How does stress affect skin appearance and health?

Acute stress can cause immediate vasoconstriction, making skin appear pale or gaunt. Chronic stress leads to accelerated aging by increasing cortisol, which breaks down collagen and elastin, thinning vessel walls and reducing skin suppleness.

What is the impact of caffeine and nicotine on skin?

Caffeine causes a transient, minute vasoconstriction, generally having a net-neutral or equivocal effect, though high intake may increase sebum production. Nicotine, especially from smoking or vaping, is a known vasoconstrictor, leading to faster aging and poor wound healing due to chronic blood vessel constriction.

Does alcohol consumption affect skin health and appearance?

Alcohol generally has negative effects on the skin. It acts as a mild diuretic, causing dehydration and hollowing (e.g., under eyes), and can trigger increased sebum production. Long-term use is associated with lifestyle choices detrimental to skin health and can disrupt the gut microbiome.

How important is water intake for skin hydration?

For individuals with a balanced or sedentary lifestyle, drinking excessive amounts of water has not been shown to directly improve skin hydration status. Skin hydration is more genetically defined and often best maintained with appropriate moisturizers.

What should one look for in a good moisturizer?

Look for moisturizers labeled 'non-comedogenic' to avoid clogged pores. Ointments (like Aquaphor or Vaseline) are greasier and provide the best barrier, ideal for eczema-prone skin. Creams and lotions are lighter; lotions, often in pump bottles, contain alcohol and are less moisturizing but better for acne-prone skin.

Are expensive skincare products more effective?

No, there is no evidence that more expensive skincare products work better than cost-effective alternatives. Often, expensive products contain more ingredients, including fragrances, which can be problematic for sensitive skin.

What causes flaky scalp (dandruff) and how is it treated?

Flaky scalp, or seborrheic dermatitis (dandruff), is often caused by an overgrowth of yeast on the scalp due to sweat and oil. Treatments include shampoos with zinc or ketoconazole and therapies to dampen the immune response.

How much sun exposure is healthy for the skin?

While excessive UV exposure is harmful and causes premature aging, some sun exposure is considered healthy. About 15-20 minutes of sun on forearms can be sufficient for Vitamin D synthesis. Being outdoors in the sun can also improve mood and reduce stress.

What are the differences between mineral and chemical sunscreens, and which are recommended?

Mineral sunscreens (zinc oxide, titanium dioxide) physically block and absorb UV without chemical change, while chemical sunscreens absorb UV and dissipate it as heat through chemical reactions. Due to concerns about chemical absorption into the bloodstream and potential endocrine disruption, mineral sunscreens are generally recommended as a safer choice, especially for children.

Can oral supplements offer sun protection?

Yes, supplements like polypodium, a fern from the Amazon, can protect skin from within by increasing its tolerance to UV exposure. Some products also include nicotinamide, which has been shown to reduce non-melanoma skin cancer risk.

What is the role of retinoids in skin health and appearance?

Prescription-strength retinoids significantly increase skin cell turnover, reduce skin cancer risk, and stimulate collagen and elastin production. They are highly effective for anti-aging and acne, unlike most weaker over-the-counter retinol products which are often inactive or unstable.

Are laser treatments effective for skin health and cancer prevention?

Certain laser and light resurfacing treatments, particularly non-ablative fractionated lasers like Fraxel, can improve skin appearance, reduce skin cancer risk by up to 20%, and activate genes associated with youthful skin cells. Ablative lasers are more aggressive but also very effective.

How does diet influence acne?

High glycemic index, sugary, and processed foods can worsen acne by increasing insulin response and inflammation. Skim and non-fat dairy products may also contribute due to emulsifiers and their glycemic effect, rather than whole fat dairy.

What measures should be taken to screen for skin cancer?

Understanding family history is crucial. Annual full-body skin exams by a board-certified dermatologist are recommended. Early detection is key, especially as skin cancers can develop in sun-protected areas like genitals and mouth, sometimes linked to HPV.

Key Moments

How to Improve & Protect Your Skin Health & Appearance | Dr. Teo Soleymani

Q: What is the recommended approach to cleansing skin?

Use mild, fragrance-free cleansers like Dove white bar soap or Cetaphil. Over-cleansing can strip natural oils and disrupt the skin microbiome, making it vulnerable to pathogens. Adjust frequency based on skin type and activity level.

Andrew Huberman

Science & Technology8 min read167 min video

Aug 19, 2024|576,892 views|13,494|952

andrew huberman huberman lab podcast huberman podcast dr. andrew huberman neuroscience huberman lab andrew huberman podcast the huberman lab podcast science podcast skin health improve skin health improve skin appearance

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TL;DR

Revolutionary skin health insights from Dr. Teo Soleymani: retinoids, sun exposure, diet, and debunking skin care myths.

Key Insights

Skin undergoes a complete cellular turnover every 28 days, highlighting its regenerative capacity.

Stress (both acute and chronic) significantly impacts skin appearance and health, primarily via cortisol-induced collagen and elastin breakdown.

Mineral-based sunscreens (zinc oxide, titanium dioxide) are generally preferred over chemical sunscreens due to concerns about systemic absorption and potential endocrine disruption.

Prescription retinoids (e.g., tretinoin) are highly effective for skin health, reducing cancer risk, growing new collagen, and improving appearance, unlike most over-the-counter retinols.

Laser resurfacing (non-ablative, fractionated lasers) can improve skin appearance and reduce non-melanoma skin cancer risk by clearing mutated cells.

A high-protein, anti-inflammatory diet is crucial for overall skin health, with specific food sensitivities and gut microbiome balance playing significant roles.

Regular dermatologist check-ups are vital for skin cancer surveillance, particularly given that most deadly skin cancers may not originate in chronically sun-exposed areas.

THE DYNAMIC NATURE OF SKIN

The skin, our body's largest organ, exhibits remarkable regenerative capabilities, with a complete surface layer turnover occurring approximately every 28 days. This constant renewal process, driven by stem cells in the epidermis, allows the skin to heal from injuries and serves as an excellent model for studying various diseases. This rapid turnover also implies that positive changes in lifestyle and skincare routines can lead to visible improvements relatively quickly, making skin a valuable biosensor for overall well-being.

THE IMPACT OF STRESS ON SKIN HEALTH

Both acute and chronic stress profoundly affect skin health and appearance. Acute stress triggers an immediate fight-or-flight response, constricting blood vessels and shunting blood away from the skin, leading to paleness or a gaunt appearance. Chronic stress, primarily mediated by elevated cortisol levels, accelerates aging by breaking down essential components like collagen and elastin, thinning vessel walls. This breakdown diminishes the skin's suppleness and can lead to hair loss, visible in situations such as high-stress periods or after significant physiological events.

LIFESTYLE FACTORS: CAFFEINE, NICOTINE, AND ALCOHOL

Caffeine's effect on skin is generally considered minimal and transient, though high intake might increase sebum production. Nicotine, however, is a known vasoconstrictor, significantly impairing blood flow to the skin, leading to accelerated aging and poor wound healing. This effect is more pronounced with smoking and vaping than with nicotine patches or gum due to higher concentrations reaching the skin. Alcohol acts as a mild diuretic, causing dehydration and compensatory sebum production, potentially leading to breakouts and congested skin. Long-term alcohol use can also disrupt the gut microbiome and is associated with lifestyle choices detrimental to skin health.

HYDRATION, MOISTURIZATION, AND CLEANSING: KEY PRACTICES

While adequate systemic hydration is crucial, direct fluid intake has not been strongly linked to skin hydration; genetic factors often dictate this. Instead, appropriate moisturization is emphasized, with distinctions between ointments (greasiest, best for dry skin/eczema), creams, and lotions (lighter, suitable for acne-prone skin). Non-comedogenic products are vital to prevent clogged pores. Over-cleansing, prevalent in highly hygienic societies, can strip natural oils and disrupt the skin microbiome, creating an environment for pathogens. Mild, fragrance-free cleansers like Dove white bar soap or Cetaphil are often recommended, tailored to individual skin type and activity levels.

SCALP HEALTH AND DANDRUFF TREATMENT

Scalp issues like dryness and flaking are typically linked to seborrheic dermatitis (dandruff) or psoriasis. Dandruff results from an overgrowth of yeast feeding on scalp sweat and oil, treated with medicated shampoos (zinc, ketoconazole) to reduce yeast and calm the immune response. Psoriasis involves an overactive immune system causing rapid skin cell proliferation. It's crucial to remember that the visible hair is dead; treatments target the scalp's living skin. Shampoos can strip natural oils from hair, making it appear limp, but don't harm the underlying follicles. Cost-effective, simple products are generally as effective as expensive ones for scalp care.

THE COMPLEX RELATIONSHIP BETWEEN SUN EXPOSURE AND SKIN CANCER

Sun exposure is a contentious topic. While some UV exposure aids Vitamin D synthesis and psychological well-being, excessive exposure contributes to photoaging. Surprisingly, widespread diligent sunscreen use hasn't definitively reduced the incidence of basal cell carcinoma (the most common skin cancer) or overall skin cancer mortality. Moreover, many lethal skin cancers often arise in non-sun-exposed areas. This suggests a complex interplay between UV damage, genetics, and the immune system, with UV light potentially acting as a trigger rather than the sole cause, challenging common notions about skin cancer prevention.

SUNSCREENS: MINERAL VERSUS CHEMICAL

Sunscreen terminology has evolved, with the term 'sunblock' now largely obsolete. Sunscreens are regulated as over-the-counter drugs and come in two main types: mineral (inorganic, e.g., zinc oxide, titanium dioxide) and chemical (organic compounds). Mineral sunscreens are generally preferred due to concerns about systemic absorption of chemical compounds (like oxybenzone, octocrylene), which have been found in blood plasma, breast milk, and amniotic fluid at levels exceeding FDA thresholds and may act as endocrine disruptors. Physical barriers like clothing, hats, and shade are highly effective. Oral supplements like polypodium (e.g., Sun powder) can also provide internal sun protection, reducing sensitivity to UV and visible light, crucial for conditions like melasma.

NUTRITION AND THE GUT-SKIN AXIS

The gut microbiome significantly influences skin health, with a dysregulated gut environment contributing to inflammatory skin conditions like psoriasis, eczema, and acne. An anti-inflammatory, high-protein diet (animal-based for complete amino acid profiles) is recommended. While individual food sensitivities exist, highly processed and sugary foods known to increase insulin and inflammation consistently worsen skin issues. Collagen supplementation is widely debated; while some benefits like temporary plumping due to increased blood osmolality are observed, direct increases in skin collagen and elastin density are not consistently evidenced, and the body can synthesize collagen from non-essential amino acids. Omega-3 fatty acids offer anti-inflammatory benefits but can thin the blood.

RETINOIDS: THE GOLD STANDARD FOR SKIN REJUVENATION

Retinoids, available in prescription strengths (e.g., tretinoin, adapalene), are powerful medications that accelerate skin cell turnover from 28 days to 7-9 days. This process helps decrease skin cancer and pre-cancer formation, stimulates new collagen growth, and improves elastin appearance, with histological verification. Unlike widely marketed over-the-counter retinols (which are inactive prodrugs requiring a two-step conversion to become effective), prescription retinoids directly activate gene transcription, leading to profound biological changes. Despite their effectiveness, they are often overlooked by the general public, overshadowed by cosmetic retinol products.

LASER AND LIGHT THERAPIES FOR SKIN HEALTH

Beyond topical treatments, dermatological procedures like laser resurfacing offer significant benefits. Non-ablative fractionated lasers (e.g., Fraxel) improve skin appearance, reduce non-melanoma skin cancer risk by 20% by eliminating mutated cells, and activate genes associated with youthful skin. Ablative lasers, though more aggressive with longer downtime, are highly effective for comprehensive resurfacing. Red light and near-infrared light therapies, (often through medical-grade panels rather than low-powered masks) show promise in improving vascular flow, aiding hair restoration, accelerating post-procedure recovery, and protecting against UV damage, though optimal parameters are still being defined.

MANAGING SPECIFIC SKIN CONDITIONS: PSORIASIS, VITILIGO, ACNE, ROSACEA, ECZEMA

Psoriasis, an autoimmune condition causing red, scaly plaques, is now treated by targeting the immune system (e.g., highly specific biologic drugs) or managing mild cases with creams, weight loss, and anti-inflammatory diets. Vitiligo, an autoimmune depigmentary disorder, involves the immune system destroying pigment-producing cells; treatments include topical immune suppressants, UV light therapy, and new Jack Inhibitors. Acne results from sebum overproduction, bacterial proliferation, and immune response; it's exacerbated by high-glycemic foods, processed sugars, and skim/non-fat dairy due to emulsifiers. Rosacea, often called adult acne, manifests as redness, flushing, pimples, or nasal enlargement; it's worsened by alcohol, UV light, spicy foods, and stress, with laser treatments effective for redness and topicals/orals for breakouts. Eczema (atopic dermatitis) involves a genetic skin barrier defect, environmental triggers, and an aberrant immune response; treatment focuses on moisturization, allergen avoidance, and topical/systemic immune suppression.

ACNE AND BREAKOUTS: UNDERSTANDING AND TREATMENT

Acne affects a broad age range, driven by excess sebum production, bacterial overgrowth (P. acnes), and a heightened immune response. High-glycemic foods and processed sugars exacerbate acne by increasing inflammation and sebum. Skim and non-fat dairy can also be problematic due to emulsifiers. The general advice is to tackle all three causes: reduce sebum, control bacteria, and calm the immune system. Resisting the urge to pick or pop pimples is critical, as physical trauma can recruit excessive matrix metalloproteinases, leading to collagen and elastin breakdown and permanent scarring. If a pimple does rupture, gentle cleansing and leaving it alone are best.

SKIN CANCER SURVEILLANCE AND PREVENTION

Skin cancer detection and prevention rely heavily on understanding individual risk factors, primarily family history and genetics. An annual full-body skin exam by a board-certified dermatologist is recommended for everyone, as skin cancers can arise in any area, including sun-protected regions (e.g., genital or oral areas, increasingly linked to HPV). For individuals with many moles, advanced tools like whole-body photography and AI-based mole mapping can help track changes. The HPV vaccine is strongly recommended for a broad age range due to HPV's link to not only cervical and throat cancers but also a significant increase in squamous cell carcinomas in non-sun-exposed areas, particularly in immunosuppressed individuals.

THE FUTURE OF SKIN CANCER TREATMENT: VACCINES

The landscape of skin cancer treatment is evolving rapidly, with promising advancements in therapeutic vaccines. These vaccines, especially mRNA-based approaches, aim to prime the immune system to recognize and target cancer cells. Early studies, particularly for melanoma, show improved survival rates when used post-surgery and chemotherapy. This revolutionary approach, which teaches the immune system what to attack, holds significant potential for various cancers, including brain tumors, and could eventually extend to all forms of skin cancer, transforming prevention and treatment strategies.

Mentioned in This Episode

●Supplements

●Products

●Software & Apps

●Companies

●Organizations

●Books

●Drugs & Medications

●Concepts

●People Referenced

Common Questions

The surface of your skin regenerates completely every 28 days. Stem cells in the lower epidermis continuously generate new skin cells, allowing for regeneration and healing.

Topics

Gut Microbiome Red Light Therapy Health & Longevity Mental Health & Psychology Human Performance Acne Treatment Skin Care Medicine & Clinical Sun Protection Skin Cancer Prevention Psoriasis Treatment Immune System Health Eczema Management Nutrition For Skin Laser Skin Treatment

Mentioned in this video

Products

Sun Powder

A brand of daily supplement formulated with polypodium and nicotinamide, designed to reduce non-melanoma skin cancer risk by up to 30% and prevent sun-related changes and burning.

Retinol

An inactive prodrug version of retinoic acid sold over-the-counter, which needs a two-step conversion to become active retinoid and is often not effective at typical concentrations.

Juv

A brand mentioned by the host that makes medical-grade red light and near-infrared light therapy devices, which are preferred due to their clinically proven wavelengths and optimal cellular adaptations.

Aquaphor

A thick, occlusive ointment-based moisturizer, excellent for dry skin and eczema prevention but can clog pores for acne-prone individuals.

Vaseline

A petrolatum jelly-based ointment that provides excellent barrier protection and moisturization.

Dove Sensitive Skin Beauty Bar

An unscented, mild bar soap recommended for newborns and kids with sensitive skin, as well as for general use.

Drugs & Medications

Minoxidil

A topical drug that increases blood flow to the dermal papilla of the hair, thereby promoting new hair growth, analogous to some effects of red light therapy.

Oxybenzone

A chemical in common sunscreens flagged by the FDA with concerns about endocrine disruption and nervous system dysregulation due to its phenolic structure.

Isotretinoin

An oral form of retinoid primarily used for severe acne and high sun-damaged skin cancer patients, but with serious fetal development risks.

Gardasil vaccine

A vaccine that builds immunity to high-risk HPV strains (16, 18, 31, 33) that cause cancer, recommended for almost anyone, including those up to their late 40s.

Octinoxate

A chemical in sunscreens with potential concerns for endocrine disruption and nervous system dysregulation, causing the FDA to question its safety.

mRNA vaccine

A type of vaccine that has shown promise in improving melanoma survival after surgery and chemotherapy by priming the immune system to target cancer cells.

Tazarotene

A common prescription-strength retinoid, effective for skin health and appearance.

Acitretin

A lesser-known oral retinoid reserved for high sun-damaged skin cancer patients, having a significant impact on skin health.

prednisone

A drug in the same family as cortisol, also mentioned as a hormone driver that can increase sebum production.

Adapalene

A common prescription-strength retinoid, effective for skin health and appearance.

Octocrylene

A chemical in sunscreens with potential concerns for endocrine disruption and nervous system dysregulation, causing the FDA to move it out of the 'generally recognized as safe and effective' category.

Organizations

Stanford University

Academic institution where Dr. Soleymani trained and Dr. Huberman holds a professorship. Also mentioned as a location for gut microbiome studies.

University of California, Los Angeles

Academic institution where Dr. Soleymani was a clinical professor of Dermatology and dermatologic surgery.

Supplements

Tretinoin

A common prescription-strength retinoid that is highly effective for acne, anti-aging, and skin cancer prevention.

Polypodium

A fern extract that, when ingested, increases the skin's minimal erythema dose, protecting against sunburns and increasing time one can be in the sun. Also helps block effects of visible light.

Nicotinamide

An ingredient in Sun Powder, shown to reduce non-melanoma skin cancer risk by up to 30%.

Zinc Oxide

A mineral component in physical sunscreens, effective as a reflecting shield against UV radiation.

Titanium Dioxide

A mineral component in physical sunscreens, providing a physical barrier against UV radiation.

Collagen

A popular supplement in the skincare world, composed of non-essential amino acids; its purported benefits for skin appearance may be partly due to increased blood osmolality and water retention rather than true collagen density increase.

Retinoids

A family of powerful medications (oral and topical) that increase skin turnover, decrease skin cancer/pre-cancer formation, grow new collagen, and increase elastin. Prescription strength is recommended over weaker over-the-counter retinol for effectiveness.

cortisol

The fundamental stress hormone of the body, which can break down collagen and elastin, leading to accelerated skin aging under chronic stress.

Vitamin D

Synthesized from UV exposure, approximately 15-20 minutes of sun on the forearms is sufficient for its formation.

People

Teo Soleymani

A double board-certified dermatologist and dermatologic surgeon, trained at Stanford University and a former clinical professor at UCLA. The guest expert on skin health.

Bob Marley

The musician who died of melanoma that arose on his toenail, highlighting that skin cancers can develop in sun-protected areas.

Jimmy Buffett

The musician who died of Merkel cell carcinoma, a rare type of skin cancer that can occur in sun-exposed areas.

Andrew Huberman

Professor of Neurobiology and Ophthalmology at Stanford School of Medicine and host of the Huberman Lab podcast.

Companies

Cetaphil

A gentle, non-comedogenic, and fragrance-free soap recommended for sensitive and oily skin types.

Concepts

Human Papillomavirus

A virus that is a rapidly increasing cause of squamous cell carcinomas in genital areas and the mouth, as well as throat cancer and plantar warts. The Gardasil vaccine is recommended for protection.

Books

New England Journal of Medicine

A prominent medical journal where a study on nicotinamide's efficacy in reducing non-melanoma skin cancer risk was published.

Software & Apps

Fraxel laser

A non-ablative fractionated laser device that has been shown to cut skin cancer risk by 20% and activate genes for more youthful, healthy skin cells.