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Red Light Therapy and Skincare: Can You Use RLT with Retinol, AHAs, and Vitamin C?

One of the most common questions in the RLT community: "Can I use my skincare products during red light therapy sessions?" The short answer: it depends on what and when.

Key Principle: RLT itself doesn't cause photosensitivity like UV light. But some skincare ingredients can interact with light wavelengths, potentially causing irritation. The safest approach: RLT first, wait, then apply actives.

Understanding Photosensitivity with RLT

True photosensitivity (from medications or conditions) causes skin to react to UV light. RLT uses non-UV wavelengths, so traditional photosensitivity rules don't fully apply.

However, some ingredients can still cause issues:

  • AHAs/BHAs: These exfoliants thin the skin's outer layer, potentially increasing sensitivity to any light
  • Retinoids: Can cause dryness and sensitivity; combined with any light might cause irritation
  • Vitamin C: Generally safe, but high concentrations might increase sensitivity

The Golden Rule: RLT First, Then Actives

Optimal Routine Order:

  1. Clean face
  2. Red light therapy session (10-15 minutes)
  3. Wait 30 minutes
  4. Apply active skincare (retinol, acids, vitamin C)

Reddit user confirms: "Just do the RLT first then wait like 30 mins before putting on topicals, that's what I do at my gym and works fine."

Specific Product Guidance

Retinol / Tretinoin

  • During RLT: Avoid applying immediately before
  • After RLT: Wait 30 min minimum, or apply at night only
  • Note: Some mask-related bruising cases involve users applying retinoids before mask use, which may increase sensitivity

AHAs (Glycolic, Lactic Acid)

  • During RLT: Not recommended immediately before
  • After RLT: Safe after waiting period
  • Tip: Consider using acids on non-RLT days to reduce cumulative sensitivity

Vitamin C (Ascorbic Acid)

  • During RLT: Generally safe, but caution if high concentration
  • After RLT: Perfect timing—helps with collagen synthesis

BHA (Salicylic Acid)

  • During RLT: Similar to AHAs—don't apply immediately before
  • After RLT: Safe after waiting

Azelaic Acid

  • During RLT: Avoid immediately before
  • Note: Used for rosacea and acne; wait after RLT sessions

Niacinamide

  • During RLT: Generally safe
  • After RLT: Perfect—supports skin barrier

What About "Enhancing" Serums?

Products like MitoAura claim to enhance RLT. The reality: "Your skin already absorbs red light pretty well on its own." While copper peptides have some science behind them, most "enhancing serums" are likely overpriced.

See: Red Light Therapy Enhancing Serums

FAQ

Q: Can I use RLT if I'm on accutane?

A: No—accutane causes extreme photosensitivity. Avoid RLT during treatment unless your doctor specifically approves.

Q: What about makeup during RLT?

A: Remove all makeup before RLT. Foundation, sunscreen, etc. block light from reaching skin.

Q: Can I do RLT and chemical peels?

A> Space them out. Do peels on non-RLT days, or wait several days after a peel before resuming RLT.

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