All protocols

Use a hat as a physical barrier for sun protection; described as more effective than topical sunscreens.

Use clothing as a physical barrier for sun protection; described as more effective than topical sunscreens.

An oral supplement the guest personally takes for internal sun protection; described as providing an internal sun shield and allowing longer sun exposure without reapplication. Later described as a single scoop mixed into a morning drink and containing polypodium plus nicotinamide.

Oral fern-derived supplement for sun protection; increases minimal erythema dose and can be taken daily or about an hour before sun exposure. Common studied doses range roughly 50-480 mg. Possible side effect is upset stomach. Useful for fair skin, sun hives/PMLE, sports or water exposure, and melasma.

Study-defined SPF assumes about an entire shot glass worth of product on sun-exposed skin.

Recommended as the single best overall diet pattern for skin health: emphasize high-protein animal-sourced complete proteins plus fruits and vegetables according to individual fiber tolerance.

Sugar binges are said to reliably trigger breakouts within a few days.

If you want retinoid benefits, see a dermatologist and get a prescription rather than relying on over-the-counter retinol, which the guest described as often ineffective and unstable.

Dermatologist-delivered resurfacing procedures can improve skin appearance and biologic health; certain resurfacing devices may reduce skin cancer risk. Ablative resurfacing vaporizes the top layer of skin, is more aggressive, has about two weeks of downtime, and is typically done about once every five years. Non-ablative resurfacing does not vaporize the top layer, has less downtime, and is generally recommended annually or biannually depending on goals.

Non-ablative fractionated laser resurfacing device; cited as reducing skin cancer risk by 20% and used for skin rejuvenation.

Combination of red and blue light may help acne-prone skin because blue light has antimicrobial properties.

Clinical unit used for narrowband UVB treatment of conditions such as psoriasis and vitiligo.

For mild psoriasis, common treatments include creams and lotions, moisturizers, low- or high-potency topical steroids, and keratolytics such as salicylic acid to remove excess scale. Emollients such as Aquaphor or Vaseline were also suggested for barrier support.

Weight loss can significantly improve psoriasis appearance.

Use UV light/phototherapy to suppress the skin immune system and clear psoriasis without pharmacologic intervention. Sunlight exposure was also noted as potentially helpful, though not usually recommended by dermatologists as primary therapy.

The cornerstone of vitiligo treatment is suppressing the skin immune response using topical creams, including topical steroids and topical calcineurin inhibitors.

Non-steroidal topical anti-inflammatory medications used for vitiligo.

308 nm UV laser used clinically to treat vitiligo; also mentioned in the context of psoriasis treatment.

Use specific wavelengths of UV light as part of vitiligo treatment, including UVB and UVA.

New creams and oral medications for refractory vitiligo; discussed as part of the recent renaissance in vitiligo treatment and immune-pathway targeting.

Effective acne treatment should address all three components: reduce sebum production, reduce acne-causing bacteria, and calm the skin immune response.

High-glycemic sugary processed foods can worsen acne and are described as reliably flaring acne in studies.

Avoid triggers that provoke flushing and worsen rosacea redness, including UV light, spicy foods, hot beverages, emotions, and life stressors.

For rosacea redness, discuss laser destruction of blood vessels with a dermatologist.

For papulopustular rosacea, oral medications can suppress bacterial and mite growth as well as the immune response in the skin.

For papulopustular rosacea, use creams that suppress bacterial and mite growth as well as the immune response in the skin.

Moisturize aggressively to seal the skin barrier defect in eczema; this helps restore the barrier like putting mortar back between bricks.

Use fragrance-free cleansers, fragrance-free detergents, fragrance-free skincare products, and non-preservative-based skincare products to mitigate environmental triggers in eczema.

Use topical steroids to dampen the immune system in eczema.

If a pimple pops on its own, clean it gently and otherwise leave it alone. Avoid hydrogen peroxide because it impairs wound healing by killing living tissue, and avoid over-the-counter topical antibiotics because many lack useful antibiotic activity and can cause allergic contact dermatitis.