Stressed Skin Starts from the Inside: Cortisol, Your Complexion, and Two Oils Worth Keeping in Your Cabinet

You have your cleanser, your moisturizer, and your favorite serum. You drink your water. You try to get some sleep. You have probably tried switching products more than once, searching for the thing that finally makes your skin behave. And still, something feels off. Your skin looks puffy, or dull, or you keep breaking out along your jaw in the same stubborn spots. The texture feels rough no matter how much you moisturize. The redness comes and goes without much warning.

Here is something worth sitting with: the answer might not be in your skincare cabinet at all.

Chronic stress and the hormones it produces are among the most overlooked culprits behind a complexion that just will not cooperate. When your body is stuck in a state of low-grade stress day after day, a quiet cascade of internal changes unfolds, and your skin is one of the first places it shows up. Not in a dramatic, overnight way. In a slow, frustrating, why-does-nothing-work kind of way.

In this post, we are going to walk through what high cortisol actually does to your complexion at the tissue level, how to naturally bring your levels back into balance, and how two simple ingredients, castor oil and magnesium oil, can support your skin from the outside while your body recalibrates from within. No complicated protocols. No expensive overhauls. Just practical knowledge rooted in real research, written for real women who want to understand what is actually happening inside their bodies.

What Is Cortisol, and Why Should You Care?

Cortisol is a steroid hormone produced by your adrenal glands, the small triangle-shaped glands that sit on top of each kidney. It is often called the "stress hormone," but that nickname undersells it a little. Cortisol plays a role in a wide range of daily bodily functions, including regulating metabolism, managing blood sugar, controlling inflammation, supporting immune response, and governing your natural sleep-wake cycle.

Every morning, cortisol naturally peaks just before you wake up. This is healthy and intentional. That morning surge is part of what gives you the energy and alertness to get up and get going. As the day progresses, levels gradually fall. By midnight, they should be at their lowest, allowing your body to shift into rest, repair, and restoration mode.

The problem is not cortisol itself. The problem is when it never comes back down.

This is what happens under chronic stress. Whether it is poor sleep, financial worry, a demanding job, skipping meals, overexercising, scrolling through anxiety-inducing news, or simply the relentless pace of modern life, your body interprets it all as a threat. It responds by activating a system called the hypothalamic-pituitary-adrenal (HPA) axis. The hypothalamus releases a hormone that signals the pituitary gland, which then signals the adrenal glands to produce cortisol. In short bursts, this is exactly what the body is designed to do. But when that loop runs continuously, cortisol remains artificially elevated for days, weeks, and months.

It is also worth noting that cortisol concentrations tend to naturally increase after midlife, meaning women in their 40s and beyond can be especially susceptible to chronically elevated levels even without any single dramatic stressor. The everyday accumulation of poor sleep, hormonal shifts, and a busy life is often more than enough to keep levels running high.

When cortisol is chronically elevated, it does not just affect your mood or your waistline. It shows up on your face. It changes the very structure of your skin. And until you understand the connection, you can chase skincare solutions forever without ever addressing the root.

Signs Your Cortisol Might Be Running Too High

Before we get into the skin piece specifically, it helps to recognize what chronically elevated cortisol can look like across the whole body. Many of these symptoms are things women chalk up to aging, hormones, or just being tired, when cortisol is quietly at the wheel.

Some of the most common signs include weight gain in the midsection and face, sometimes called "moon face," a bloated or puffy appearance that does not seem connected to what you are eating. Many women with high cortisol describe waking between two and four in the morning feeling alert and wired, unable to fall back asleep even when they are exhausted. A low-grade anxiety that feels like your nervous system is always slightly dialed up, irritability that comes out of nowhere, and a persistent craving for sugar or carbohydrates are also hallmark signs. Irregular cycles, low libido, and a general feeling of being "tired but wired" round out the picture.

And then there is your skin.

Dullness that does not lift. Breakouts that cluster around the chin and jaw. Skin that feels sensitive or reactive to products it used to tolerate just fine. Fine lines that seem to be progressing faster than they should. A barrier that feels perpetually compromised, tight after washing, dry in some spots, oily in others.

These are not random. They are your body communicating, and once you know what to listen for, it becomes much easier to respond.

What High Cortisol Actually Does to Your Complexion

This is where it gets fascinating, and honestly, a little sobering. Cortisol affects the skin through several distinct biological pathways, each one well-documented in published research. Understanding them helps explain why stressed skin behaves the way it does, and why addressing cortisol from the inside makes such a meaningful difference in how your complexion looks and feels.

It Breaks Down Collagen and Accelerates Aging

Collagen is the structural protein that keeps your skin firm, plump, and resilient. Cortisol actively suppresses the fibroblasts responsible for producing it. Over time, as cortisol stays elevated, collagen breaks down faster than the skin can rebuild it. The result is a gradual loss of firmness and elasticity, the appearance of fine lines, and skin that looks older than it should.

Research by Nobel Prize-winning scientist Elizabeth Blackburn found that women under chronic stress showed signs of biological aging equivalent to more than a decade beyond their actual age, visible in the skin as accelerated fine lines, loss of firmness, and an overall lack of vitality [1]. That is not a small finding. That is a decade of visible aging driven not by time, but by stress hormones.

A 2024 review published in the International Journal of Dermatology found that cortisol, by activating specific skin enzymes, directly reduces dermal collagen levels and contributes to measurable skin thinning over time. Inhibiting those enzymes, the researchers noted, was associated with meaningful increases in collagen content and dermal thickness [3]. A 2025 study published in the Journal of Cosmetic Dermatology built on this, confirming that chronic psychological stress produces measurable signs of skin aging, with cortisol identified as a key driver of DNA damage, decreased antioxidant capacity, and weakened barrier function [2].

It Destroys Your Skin Barrier

Your skin barrier is the outermost layer of your skin, and its job is to keep moisture in and irritants out. When it is functioning well, your skin feels comfortable, hydrated, and resilient. When it is compromised, everything feels harder.

Cortisol directly undermines this protective layer by decreasing two key structural proteins: filaggrin and loricrin. These proteins are essential to the integrity of the barrier. Research has confirmed that psychological stress triggers a measurable reduction in filaggrin synthesis, causing the barrier to develop gaps where moisture escapes and irritants get in, leaving skin reactive, dry, and sensitive [2]. This is why stressed skin so frequently feels intolerant of products it used to love. The barrier has been structurally weakened and can no longer buffer as it once did. If you have noticed your skin acting more sensitive lately and nothing in your routine has changed, cortisol is worth looking at. For a deeper look at what barrier damage looks and feels like day to day, this post is a helpful place to start: Is Your Skin Barrier Damaged? 5 Signs Your Skin Is Asking for Help.

It Drives Breakouts and Excess Oil

Cortisol directly stimulates the sebaceous glands to produce more oil. More oil means more clogged pores, and clogged pores mean breakouts. Research has confirmed that cortisol and stress hormones directly affect sebum production, leading to a higher likelihood of acne breakouts during periods of chronic stress [4]. This is why stress-related breakouts tend to appear along the chin, jaw, and neck, and why they often come a week or two after a particularly difficult stretch, just when you thought things were settling down.

The inflammation that cortisol triggers compounds the issue. Chronically elevated cortisol keeps the immune system switched on, fueling ongoing skin inflammation that makes breakouts slower to heal and easier to scar. For women already managing hormonal acne, high cortisol is often the invisible variable that keeps it from fully resolving. You can read more about common skin troubles and how to address them naturally in this guide: Guide to Spotting and Treating Common Skin Troubles.

It Dulls the Complexion and Slows Healing

When cortisol is chronically elevated, it slows tissue repair. Minor blemishes take longer to heal. Post-inflammatory marks linger. The skin's natural cell turnover process, which is responsible for that fresh, glowing look, becomes sluggish. Skin looks flat, tired, and uneven, not because of the products you are using, but because the internal repair systems are running behind.

Poor sleep compounds all of this. Elevated cortisol disrupts nocturnal skin regeneration, the window when your skin does its most important repair work [2]. Inflammation gets worse. Complexion gets duller. The cycle feeds itself. If you are looking for ways to improve your sleep to support your skin, this nighttime routine post is worth a read: "Sleep Better Naturally: Simple Nighttime Tips for Deep, Restful Sleep."

How to Naturally Lower Your Cortisol Levels

The good news is that cortisol is responsive. Unlike some aspects of our health that feel fixed or out of reach, cortisol levels are genuinely influenced by daily habits, and small, consistent changes can make a meaningful difference over time. None of what follows requires a prescription, an expensive supplement stack, or a complete lifestyle overhaul. These are the kinds of slow, steady, farm-girl practices that compound quietly in the background while you go about your life.

Prioritize Sleep Above Almost Everything Else

If there is one lever to pull first, it is sleep. Cortisol and sleep are locked in a continuous loop. Poor sleep raises cortisol, and elevated cortisol disrupts sleep. Breaking that cycle is foundational to everything else.

Your cortisol naturally drops to its lowest point around midnight and peaks just before you wake. When you do not get enough sleep or when your sleep quality is poor, this natural rhythm is disrupted, and your baseline cortisol rises. Research has shown that people who sleep fewer than six hours regularly experience measurably higher cortisol levels the following day [5]. Over time, this chronic sleep debt keeps the HPA axis in a low-grade state of activation, even when nothing externally stressful is happening.

Practical places to start: keep a consistent sleep and wake time even on weekends, lower the temperature in your bedroom, switch to red or amber lighting in the evenings, and limit screen exposure for at least an hour before bed. Blue light from screens suppresses melatonin production, which further disrupts the natural cortisol rhythm. For a full evening wind-down routine that supports both sleep and skin, this post covers it beautifully: A Simple Nighttime Routine for Deeper, More Restful Sleep.

Learn to Breathe Intentionally

This one sounds almost too simple, but the research behind it is solid. Slow, deliberate breathing activates the parasympathetic nervous system, the branch responsible for rest, digestion, and repair. It is the direct physiological counterweight to the fight-or-flight response that cortisol drives.

The Mayo Clinic notes that mindfulness and breathing exercises lower cortisol and can help manage stress-related health conditions [5]. One of the most accessible techniques is the 4-7-8 method: inhale for four counts, hold for seven, exhale slowly for eight. Even two or three rounds of this during a stressful moment can begin to shift your nervous system state. A few minutes of slow breathing before bed, before a difficult conversation, or during a midday reset can add up significantly over time.

Move Your Body, But Do Not Overdo It

Regular moderate exercise is one of the most effective tools for lowering long-term cortisol levels. It improves sleep quality, supports healthy hormone regulation, and gives the nervous system a constructive outlet for the stress it has been holding. Walking, swimming, gentle cycling, yoga, and low-intensity strength training all fall into this category.

The important caveat is intensity. High-intensity exercise performed too frequently, or without adequate recovery, can actually spike cortisol rather than lower it [4]. If you are already running on empty and you push your body through grueling workouts daily, you may be adding fuel to the fire. Listen to your body. On high-stress days, a twenty-minute walk outdoors will serve your cortisol levels better than a punishing workout.

Eat in a Way That Supports Your Adrenals

What you eat directly influences cortisol, though it is not always the connection people think of first. Severe calorie restriction actually raises cortisol, as the body interprets under-eating as a form of stress. Erratic blood sugar, driven by high sugar intake and skipping meals, keeps cortisol spiking throughout the day to compensate.

Research involving more than 200 teenagers found that those who followed a Mediterranean-style diet had measurably lower cortisol levels than those who did not [4]. Whole grains, healthy fats, low-fat dairy, leafy greens, and fatty fish all appear to support lower cortisol. Foods rich in omega-3 fatty acids, like wild-caught salmon, walnuts, and flaxseed, are particularly supportive. Dark chocolate, in reasonable amounts, has also shown cortisol-lowering effects. On the other hand, excess caffeine, especially later in the day, is worth watching closely since it directly stimulates cortisol production.

The goal is not dietary perfection. It is consistency and nourishment. Regular meals, plenty of whole foods, and stable blood sugar go a long way.

Spend Time Outside

Spending time in nature is one of the simplest and most underutilized tools for cortisol regulation. A 2019 study found that spending just 20 minutes in a natural setting, whether a park, a garden, a trail, or even a quiet backyard, produced significant, measurable reductions in cortisol compared with time spent indoors [6]. You do not have to hike a mountain. You just have to step outside and be present in it.

For those of us drawn to the farm-girl way of living, this is a reminder that the lifestyle itself is medicine. Gardening, walking barefoot in grass, sitting with animals, watching the sky change, these are not small things. They are cortisol interventions dressed up as ordinary moments.

Lean Into Connection and Laughter

Social connection has a measurable impact on cortisol. Research has shown that affectionate interaction with a trusted person before a stressful event results in lower stress-induced cortisol and blood pressure responses [5]. Laughter works similarly. It stimulates endorphin production, actively lowers cortisol, and shifts your physiological state in a way that is hard to replicate with any supplement. Time with people who make you feel safe and seen, pets included, is genuinely therapeutic for your stress hormones.

Consider Targeted Supplements

Certain supplements have shown meaningful results in clinical research for cortisol regulation. Ashwagandha, an adaptogenic herb with a long history in Ayurvedic medicine, has been studied extensively and shown to reduce cortisol levels in chronically stressed adults [5]. Fish oil, rich in omega-3 fatty acids, supports adrenal function and has demonstrated cortisol-lowering effects in research settings. A 2024 meta-analysis of 46 studies also found that probiotic supplementation measurably decreased cortisol levels, though results varied across strains and populations [5].

As always, it is worth talking to your physician before adding new supplements, particularly if you are managing any underlying health conditions or taking medications. These are supportive tools, not replacements for addressing the root causes of chronic stress.

Castor Oil for Cortisol-Damaged Skin

Now that we have talked about lowering cortisol from the inside, let us talk about what you can do topically to support the skin that chronic stress has been working against. Because even as you do the internal work, your skin needs targeted nourishment to repair what cortisol has broken down.

Castor oil is one of the most versatile and underappreciated ingredients in natural skincare, and it is particularly well-suited for stressed, cortisol-compromised skin. Cold-pressed from the seeds of the Ricinus communis plant, castor oil is rich in ricinoleic acid, a rare fatty acid that makes up roughly 90 percent of its composition, along with vitamin E, omega fatty acids, and antioxidant compounds.

What makes ricinoleic acid so interesting from a skin science standpoint is its demonstrated anti-inflammatory activity. Published research in Mediators of Inflammation assessed its activity across multiple experimental models and reported meaningful results, noting similarities between the effects of ricinoleic acid and capsaicin in modulating neurogenic inflammation [7]. For skin chronically inflamed by elevated cortisol, this is a meaningful property.

Because cortisol weakens the skin barrier by depleting filaggrin and loricrin, the barrier develops structural gaps that allow moisture to escape and irritants to enter. The fatty acids in castor oil, particularly ricinoleic acid, help fill those gaps and reinforce the lipid matrix that holds the barrier together [7]. Because cortisol drives sebum overproduction and the inflammation that turns clogged pores into breakouts, castor oil's antimicrobial and anti-inflammatory properties make it a thoughtful addition to acne-prone skincare. It helps reduce redness, calm irritation, and support a clearer complexion without the harshness of conventional acne treatments that can further strip and destabilize an already compromised barrier.

Because cortisol dulls the complexion and slows healing, castor oil's ability to support cellular repair and keep the skin moist during healing makes it useful for fading post-inflammatory marks and maintaining an environment conducive to recovery.

There is also promising research around castor oil and hyperpigmentation specifically. A clinical trial published in the Journal of Cosmetic Dermatology found that a cream containing castor oil was an effective treatment for infraorbital hyperpigmentation, the dark discoloration that appears under the eyes [8]. The researchers attributed this to the oil's anti-inflammatory, antioxidant, and antibacterial properties, noting that compounds such as ricinoleic acid, linoleic acid, and phenolic compounds contribute to its skin-clarifying effects.

When choosing castor oil for your face and skin, look for the terms "cold-pressed" and "hexane-free" on the label. Cold-pressing preserves the oil's active compounds, and hexane-free ensures no harsh solvent residue remains. Because castor oil is quite thick, many people find it works best mixed with a lighter carrier oil like jojoba or applied to damp skin after a shower. A patch test is always a good idea before applying it to your face, as some people with sensitive skin do find it too occlusive on its own.

For more on how castor oil works as a multi-purpose natural remedy, this post dives deeper into its benefits for hair, lashes, and brows: Natural Hair Growth with Castor Oil: Benefits for Hair, Lashes and Brows. And if you are curious about the belly button application that has been circulating in the wellness space, this post breaks it down: Belly Button Benefits of Castor Oil: A Simple Routine Your Body Might Be Missing.

Magnesium Oil for Stress, Cortisol, and Your Skin

If castor oil is the topical repair ingredient for cortisol-damaged skin, magnesium oil works at a different and arguably deeper level. It does not just address the symptoms of stress on the skin. It helps interrupt the stress response itself.

First, a quick clarification on the name. Magnesium oil is not actually an oil. It is magnesium chloride dissolved in water, and the name comes from its slightly slippery texture when applied to the skin. It is typically sprayed or massaged onto the body and absorbed transdermally, bypassing the digestive system entirely.

The Cortisol-Magnesium Connection

Magnesium plays a direct regulatory role in the HPA axis, the very system that produces cortisol. Low magnesium levels are associated with elevated cortisol, and chronically high cortisol depletes magnesium stores, creating a cycle that is difficult to break without intentional replenishment. Research shows that magnesium helps modulate the nervous system and downregulate the stress response, with transdermal application supporting the parasympathetic activation associated with rest and recovery [9].

A 2026 review published in JAAD Reviews confirmed that magnesium influences keratinocyte proliferation, fibroblast migration, collagen synthesis, and barrier function, processes that cortisol directly suppresses [9]. In other words, magnesium supports the very rebuilding work that cortisol tears down. The same review found preclinical and clinical evidence suggesting potential benefits in atopic dermatitis, psoriasis, acne, wound healing, and photoprotection, reinforcing how central this mineral is to healthy skin biology.

Research published in the Italian Journal of Anatomy and Embryology found that participants who applied a concentrated magnesium chloride spray to their skin twice daily for four months showed a progressive, measurable increase in intracellular magnesium levels, supporting the idea that topical application raises levels in the body over time [10].

What Magnesium Oil Does for Your Skin Directly

Beyond its role in calming the stress response, magnesium contributes to skin health through several direct pathways.

It helps regulate oil production and supports clearer skin. Because magnesium helps balance inflammation and hormone-driven sebum overproduction, it can be a helpful support for acne-prone skin. Research confirms a meaningful relationship between magnesium status and inflammatory skin conditions, including acne vulgaris, with magnesium influencing skin hydration, barrier repair, and epidermal differentiation [9].

It supports the skin's natural barrier function. Magnesium helps regulate ionic balance and enzymatic activity in the epidermis, thereby supporting keratinocyte differentiation and a healthier, more resilient outer layer [9]. For skin that has been structurally weakened by cortisol, this is particularly valuable.

It has anti-inflammatory properties that directly benefit the skin. Research has found that magnesium can reduce the chronic skin inflammation that cortisol perpetuates, with evidence suggesting benefits for inflammatory conditions such as eczema and psoriasis [9].

It supports collagen synthesis. As a cofactor in more than 300 enzymatic reactions in the body, magnesium is essential to the processes that produce and maintain collagen [9]. Given that cortisol actively breaks collagen down, replenishing magnesium is one of the most direct ways to support the skin's ability to rebuild.

How to Use Magnesium Oil

Magnesium oil is simple to incorporate into a daily routine. Spray it directly onto clean skin on your arms, legs, or abdomen. Many people find the soles of the feet to be an excellent site of application because the feet contain some of the highest concentrations of sweat glands in the body, making them highly efficient for transdermal absorption. Applying it to the feet before bed has the added benefit of supporting relaxation and sleep onset, which, as we have already discussed, is one of the most powerful cortisol-lowering tools available.

A slight tingling sensation on first application is common, particularly if your levels are depleted, and it typically lessens with regular use. Leave it on for at least twenty minutes before rinsing if desired, or simply let it absorb overnight. For best results, use it consistently rather than occasionally.

A Simple Evening Routine to Bring It All Together

All of the knowledge in the world is only as useful as what you actually do with it. So here is what this can look like in practice: a simple, unhurried evening routine that works with your body rather than against it.

After a warm shower, while your skin is still slightly damp, apply a small amount of castor oil mixed with a lighter carrier oil to your face. Focus on areas where cortisol has done its most visible work, under the eyes, along the jawline, across any dry or reactive patches. Let it absorb while you do your other wind-down steps.

Spray magnesium oil onto the soles of your feet and your lower legs. Take a few slow, deliberate breaths while it absorbs. Try the 4-7-8 method: in for four, hold for seven, out for eight. Do this two or three times.

Dim the lights. Put the phone down. Choose a book over a screen.

That is it. No elaborate protocol, no ten-step process. Just a few intentional minutes that signal to your nervous system that the day is over and it is safe to rest. Cortisol responds to exactly these kinds of cues. So does your skin.

For more ideas on building an evening routine that supports deeper sleep and genuine restoration, this post is a favorite: A Simple Nighttime Routine for Deeper, More Restful Sleep.

Frequently Asked Questions

Can stress really cause acne and wrinkles at the same time? Yes, and through distinct mechanisms. Cortisol increases sebum production, leading to breakouts, while simultaneously breaking down collagen and weakening the skin barrier, accelerating the appearance of fine lines and loss of firmness [1] [4]. The two processes run in parallel, which is why chronically stressed skin often looks both congested and aged.

How long does it take to lower cortisol naturally? This varies depending on how elevated your levels are and which strategies you use, but many people notice meaningful changes in sleep quality, skin health, and overall anxiety within two to four weeks of consistently prioritizing sleep, breathwork, and nutrition [5]. Cortisol is responsive to lifestyle, but it rewards consistency over intensity.

Is castor oil safe for all skin types? For most people, yes, particularly when using cold-pressed, hexane-free castor oil. Because it is quite thick, those with very oily or acne-prone skin may find it works better mixed with a lighter oil like jojoba rather than applied alone. Always do a patch test on your inner arm before applying to your face [7].

Can you use magnesium oil every day? Yes. Daily use is actually where the benefit compounds most effectively, particularly for cortisol regulation and sleep support. Start with a smaller amount and increase gradually to allow your skin to adjust to the sensation [9].

What is the fastest way to lower cortisol in the morning? Getting natural light exposure within thirty minutes of waking helps anchor your circadian rhythm and supports a healthy cortisol curve throughout the day. Pairing that with a nourishing breakfast that stabilizes blood sugar, rather than skipping breakfast or reaching for coffee first thing, keeps cortisol from spiking unnecessarily early in the day [5].

The Takeaway

Your skin is not separate from your stress. It is a direct reflection of your nervous system, your sleep, your nutrition, and the internal environment your body is living in day to day. When cortisol is chronically elevated, your complexion carries the weight of it in ways that no serum or cleanser alone can fix.

The path forward is not complicated, but it does ask you to look inward before reaching for another product. Support your sleep. Nourish your body. Slow down where you can. And in the meantime, reach for simple, real ingredients like castor oil and magnesium oil that meet your skin where it is and help it do what it is always trying to do: heal, strengthen, and glow.

For more on building a natural skincare routine that supports your skin from the outside in, this guide is a wonderful complement to everything we have covered here: How to Glow Naturally in 7 Days.

References

Epel, Elissa S., Elizabeth H. Blackburn, Jue Lin, Firdaus S. Dhabhar, Nancy E. Adler, Jason D. Morrow, and Richard M. Cawthon. "Accelerated Telomere Shortening in Response to Life Stress." Proceedings of the National Academy of Sciences, vol. 101, no. 49, 2004, pp. 17312-17315.
Pujos, Muriel, Cecile Chamayou-Robert, Marine Parat, Magali Bonnet, Sandra Couret, Alessia Robiolo, and Olivier Doucet. "Impact of Chronic Moderate Psychological Stress on Skin Aging: Exploratory Clinical Study and Cellular Functioning." Journal of Cosmetic Dermatology, vol. 24, no. 1, 2025, e16634.
Hall, L., and R. Hart. "Role of Corticosteroids in Skin Physiology and Therapeutic Potential of an 11beta-HSD1 Inhibitor: A Review." International Journal of Dermatology, vol. 63, 2024, pp. 443-454.
Zhang, H., M. Wang, X. Zhao, Y. Wang, X. Chen, and J. Su. "Role of Stress in Skin Diseases: A Neuroendocrine-Immune Interaction View." Brain, Behavior, and Immunity, vol. 116, 2024, pp. 286-302.
Mayo Clinic Staff. "Stress Management: Relaxation Techniques." Mayo Clinic, 2024, mayoclinic.org.
Hunter, MaryCarol R., Brenda W. Gillespie, and Sophie Yu-Pu Chen. "Urban Nature Experiences Reduce Stress in the Context of Daily Life Based on Salivary Biomarkers." Frontiers in Psychology, vol. 10, 2019, article 722.
Vieira, C., S. Evangelista, R. Cirillo, A. Lippi, C.A. Maggi, and S. Manzini. "Effect of Ricinoleic Acid in Acute and Subchronic Experimental Models of Inflammation." Mediators of Inflammation, vol. 9, no. 5, 2000, pp. 223-228.
Parvizi, Mohammad Mahdi, Nasrin Saki, Soodabeh Samimi, Roya Radanfer, Mohammad Miaad Shahrizi, and Mohammad Mehdi Zarshenas. "Efficacy of Castor Oil Cream in Treating Infraorbital Hyperpigmentation: An Exploratory Single-Arm Clinical Trial." Journal of Cosmetic Dermatology, vol. 23, no. 3, 2024, pp. 911-917.
Chalupczak, Natalia V., and Shari R. Lipner. "The Role of Magnesium in Dermatology." JAAD Reviews, vol. 7, 2026, pp. 24-30.
Piccini, F., G. Ragazzoni, L. Valentini, E. Faloia, and P. Gobbi. "Intracellular Absorption of Transdermal Magnesium Demonstrated by ESEM-EDS." Italian Journal of Anatomy and Embryology, vol. 119, no. 1, 2015, p. 152.

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