Ayurveda for skin conditions: evidence, and a specific warning

Eczema, psoriasis, acne and vitiligo are chronic, visible and frequently distressing, and conventional treatment is often experienced as inadequate. That combination makes dermatology one of the largest markets for alternative treatment.

The warning first

Undeclared corticosteroids in topical products are a documented and serious problem.

Analyses of herbal and traditional creams marketed for eczema and other skin conditions have repeatedly found potent corticosteroids present without being listed.

The consequence is that the product works dramatically, which builds confidence in it, and prolonged use of potent steroids without supervision causes skin atrophy, stretch marks, visible blood vessels, and — with sufficient absorption, particularly in children or over large areas — suppression of the adrenal axis.

Stopping causes rebound worsening, which drives further use.

Regulatory authorities in several countries have issued warnings and recalls, and cases of adrenal suppression in children from unlabelled steroid creams are documented.

If a herbal cream works dramatically and quickly on an inflammatory skin condition, and the condition flares badly when you stop, undeclared steroid is a real possibility. Take the product to your doctor.

The skin-lightening problem

A separate and serious issue. Skin-lightening products, including some marketed as traditional or herbal, have been found to contain mercury and potent corticosteroids.

Mercury in skin products causes kidney damage and neurological effects, and it is absorbed through skin. Multiple countries have issued warnings and prohibitions, and cases of mercury poisoning are documented.

These products should be avoided entirely.

What has some evidence

Eczema. Emollients are the foundation of management, and several plant oils have supporting evidence — sunflower seed oil and coconut oil in particular have small trials suggesting benefit for barrier function and symptoms.

Olive oil, somewhat counterintuitively, has been found in some studies to impair barrier function, which is a useful reminder against assuming interchangeability.

Some traditional Chinese herbal preparations have been studied for eczema, with reviews finding limited evidence and noting safety concerns including hepatotoxicity in some formulations.

Psoriasis. Some studies of topical preparations exist. Evidence is limited. Conventional treatments including topical vitamin D analogues, phototherapy and, for severe disease, systemic and biologic treatments have substantial evidence, and biologics in particular have transformed outcomes for severe psoriasis.

Acne. Some evidence for tea tree oil in mild acne, with slower onset and fewer side effects than benzoyl peroxide in comparative studies. Neem and other preparations have limited evidence.

Vitiligo. Traditional treatments using psoralen-containing plants have a genuine historical connection to modern phototherapy — psoralen plus ultraviolet light is an established treatment, derived from exactly this tradition.

This is a case where a traditional practice was investigated, the active principle identified, and it became a standard treatment. It is also a treatment with real risks including burning and long-term skin cancer risk, administered under supervision. Self-treating with plant preparations and sun exposure risks severe burns.

The classical framework's dietary emphasis

Ayurvedic management of skin conditions places substantial emphasis on diet, on digestion, and on avoiding foods classified as incompatible.

Evidence for dietary intervention in skin conditions is limited and specific.

Food allergy genuinely triggers eczema in a minority of children, and identifying it requires proper allergy assessment rather than elimination diets, which carry nutritional risk in children.

For acne, there is some evidence associating high glycaemic load diets and possibly dairy with severity, with effect sizes that are modest.

Extensive elimination diets for skin conditions are not supported and carry real costs, particularly in children.

What has the best evidence

Eczema: regular generous emollient use, topical corticosteroids of appropriate potency used correctly, topical calcineurin inhibitors, identification and avoidance of individual triggers, and for severe disease, systemic and biologic treatments.

Steroid phobia is well documented and leads to under-treatment, which produces worse outcomes than appropriate use. Topical steroids used correctly, under guidance, are safe and effective.

Psoriasis: topical treatments, phototherapy, and systemic or biologic treatment for moderate to severe disease.

Acne: topical retinoids, benzoyl peroxide, antibiotics used appropriately, hormonal treatment, and isotretinoin for severe disease.

The reasonable approach

Emollients and gentle skin care, which the classical routine also emphasises, are compatible with everything and worth doing.

Established treatment should not be replaced by unproven alternatives, particularly for conditions where undertreatment produces scarring, as in acne, or substantial quality of life impact.

Any topical product should have a full ingredient list. Products without one should not go on your skin.

Do not use unlabelled topical products. If a herbal cream produces dramatic improvement and rebound worsening on stopping, show it to your doctor. Avoid skin-lightening products entirely. A changing or non-healing skin lesion requires urgent assessment.