Polypodium leucotomos
Also known as: Polypodium leucotomos extract, PLE, fern extract, Heliocare (brand)
Multiple systematic reviews identify oral PLE as among the supplements with the strongest evidence for photoprotective effects and as an adjunct in melasma and vitiligo when combined with phototherapy. The evidence base includes randomized controlled trials and treatment studies in humans; reviewers note promising efficacy but also limitations such as small sample sizes and short durations. Safety is generally reported as encouraging in these reviews.
Last reviewed: 2026-10-14 · 5 indexed studies
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Overview
Polypodium leucotomos extract (PLE) is an oral fern-derived polyphenolic preparation used mainly as an oral photoprotective agent and as an adjunct in several dermatological conditions. Systematic reviews of human studies report evidence for photoprotection and potential benefit as an adjunctive therapy for melasma, vitiligo and other photodermatoses, with an overall favourable safety profile.
Mechanism & Function
Mechanism of Action
Reported mechanisms in the reviews include antioxidant, anti-inflammatory and immunomodulatory effects that reduce UV-induced damage, which plausibly underpins observed photoprotective and adjunctive dermatologic benefits.
Physiological Role
Modulation of cutaneous response to ultraviolet radiation via reduction of oxidative stress and inflammatory signalling; potential immunomodulation relevant to autoimmune depigmenting conditions.
Primary Pathways
Performance / Health Relevance
Not applicable to exercise performance. Relevance is to dermatological outcomes related to UV exposure and photodamage.
Evidence Review
Practical Use & Dosage
- Minimum Effective Dose
- Not established (doses not specified in provided abstracts)
- Optimal Range
- Not established
- Upper / Caution Level
- Not established
- Timing
- Not established
- Best Format
- Oral extract capsules/tablets
- Bioavailability
- Not specified in the provided abstracts
- Absorption Considerations
- Not specified in the provided abstracts
Safety & Interactions
Side Effects
- •Generally well tolerated in reviewed studies (specific adverse events not detailed in provided abstracts)
Who Should Avoid
- •Not specified in the provided abstracts; standard caution in pregnancy/lactation or severe illness as per clinical judgement
Monitoring
Not specified in the provided abstracts; monitor clinical response and tolerability when used adjunctively with other dermatologic treatments.
Frequently Asked Questions
Auto-generated from indexed evidence — dosage, safety, interactions, and more.
When is Polypodium leucotomos typically used or indicated?
Polypodium leucotomos is most commonly used for: Oral photoprotection (adjunctive to sunscreens and phototherapy), Adjunctive treatment for melasma, Adjunctive treatment for vitiligo and other photodermatoses, Support for photoaging/actinic damage management. Modulation of cutaneous response to ultraviolet radiation via reduction of oxidative stress and inflammatory signalling; potential immunomodulation relevant to autoimmune depigmenting conditions.
How does Polypodium leucotomos work?
Reported mechanisms in the reviews include antioxidant, anti-inflammatory and immunomodulatory effects that reduce UV-induced damage, which plausibly underpins observed photoprotective and adjunctive dermatologic benefits.
What is the recommended dose of Polypodium leucotomos?
The optimal range is Not established. with a minimum effective dose of Not established (doses not specified in provided abstracts). Best taken: Not established. Upper / caution level: Not established.
What are the side effects of Polypodium leucotomos?
Reported side effects include: Generally well tolerated in reviewed studies (specific adverse events not detailed in provided abstracts). Monitoring: Not specified in the provided abstracts; monitor clinical response and tolerability when used adjunctively with other dermatologic treatments.
Who should avoid Polypodium leucotomos?
Polypodium leucotomos is generally not recommended for: Not specified in the provided abstracts; standard caution in pregnancy/lactation or severe illness as per clinical judgement.
How strong is the evidence for Polypodium leucotomos?
Evidence level: Moderate (overall score 71/100), based on 5 indexed studies on SuppIndex.
Research & References (5)
Oral Supplements and Photoprotection: A Systematic Review.
Systematic review assessing dietary supplements for photoprotection; identified 47 studies including multiple supplement types and concluded the greatest evidence of photoprotection exists for polyphenols, carotenoids and Polypodium leucotomos, though limitations include small sample sizes and short durations.
The Utility of Oral Polypodium Leucotomos Extract for Dermatologic Diseases: A Systematic Review.
Systematic review of oral PLE for dermatologic diseases; 21 articles met inclusion criteria, including 11 RCTs and 5 treatment trials across conditions such as photoaging, actinic keratosis, photodermatoses, melasma and vitiligo; authors report therapeutic potential and an encouraging safety profile.
Melasma: systematic review of the systemic treatments.
Systematic review of oral medications and supplements for melasma; eight RCTs met inclusion criteria and PLE was among agents reported to have a beneficial effect on melasma improvement, with tolerability acceptable.
A Systematic Review of Nutrition, Supplement, and Herbal-Based Adjunctive Therapies for Vitiligo.
Systematic review of nutrition and supplements for vitiligo; PLE included among supplements reviewed and noted as promising when used with phototherapy or photochemotherapy.
Interventions for vitiligo.
Cochrane-style systematic review of interventions for vitiligo that included PLE among newer interventions; many trials were small and combination therapies often reported better results, making attribution to a single agent difficult.
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Research Overview
Moderate EvidenceCite this ingredient
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Stable URL
https://thesuppindex.com/ingredients/polypodium-leucotomos
SuppIndex. (2026). Polypodium leucotomos: Evidence summary, dosage and clinical studies. Retrieved October 16, 2026, from https://thesuppindex.com/ingredients/polypodium-leucotomos
Based on 5 indexed studies · Evidence level: Moderate.
Goal Ratings
Stack Compatibility
Often used as an adjunct to topical agents and phototherapy in studies; compatibility with specific drugs not detailed in the provided abstracts.