Skin Health
Polypodium Leucotomos
Also known as: PLE, Fernblock
Fern extract providing internal sun protection. Popular in dermatology for UV sensitivity.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Sun protection
- UV damage
- Photoaging
- Sun sensitivity
How it works
- Reduces UV-induced damage
- Anti-inflammatory
- Protects against photodamage
Dosage
- Typical range
- 240-480mg daily
- Timing
- Before sun exposure
- With food
- Optional
- Duration
- During sun exposure periods
- Special populations
- Fair skin, sun sensitivity, outdoor activities
Forms
- Capsules
Safety
Common side effects
- Rare GI
Contraindications
- Fern allergy
Evidence notes
Dermatologist-recommended for sun sensitivity
Grade B: Some human trials support key claims; further confirmation needed.
Related in Skin Health
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.