Red-light therapy has become one of the most popular at-home wellness and skincare treatments.
From enhancing skin tone to promoting collagen synthesis, millions of people are incorporating red-light therapy into their daily routines. However, one question that often arises is:
Should you wear sunscreen or makeup under red light?
The straightforward answer is that red and near-infrared light can most effectively penetrate clean, bare skin. Certain skincare products and cosmetic formulations may alter or obstruct the transmission of light before it reaches target skin tissues.
Why Clean Skin Helps Light Reach the Target Area
To understand light penetration, we first need to look at the underlying mechanism. Photobiomodulation works by delivering concentrated red and near-infrared light directly to cellular targets. When absorbed by chromophores in skin cells, these specific wavelengths boost normal cellular functions, thereby promoting skin health and cellular repair. [1]
While a thin, fully absorbed layer of a lightweight hydrating serum is generally not a major barrier, heavier cosmetic products like thick physical sunscreens and foundations can substantially reduce the effective light intensity reaching skin tissue due to reflection, absorption, and scattering from mineral pigments.
Imagine trying to shine a flashlight through a tinted window. Heavy facial oils, dense creams, makeup layers, and mineral sunscreens can alter or reduce light transmission depending on formula density and wavelength. [2]
For this reason, standard clinical practice and manufacturer protocols recommend applying red-light therapy to clean and dry skin for optimal phototherapeutic delivery.
Can Sunscreen, Foundation, or Tinted Moisturizer Block Red Light?
Different cosmetic products impact light penetration in distinct ways.
Sunscreen
Sunscreen is engineered specifically for absorbing, reflecting, or scattering ultraviolet (UV) radiation. Although red and near-infrared light operate at significantly longer wavelengths than UV rays, certain sunscreens—particularly thick mineral sunscreens that contain zinc oxide or titanium dioxide—create a physical barrier that attenuates light penetration. [3]
When conducting indoor red-light therapy, you do not need to wear sunscreen during the session.
Instead:
Cleanse and wash off sunscreen prior to your light therapy session.
Apply fresh broad-spectrum sunscreen afterward if you plan to spend time outdoors.
Foundation
Liquid and cream foundations typically contain dense pigments, talc, iron oxides, silicones, and oils designed to provide opacity. These opaque pigments can scatter and absorb light energy before it can penetrate into deeper skin layers. For facial treatments, removing all pigmented and opaque makeup is a necessary step.
For best results, thoroughly remove:
- Liquid foundation
- Powder foundation
- BB cream
- CC cream
- Concealer
Tinted Moisturizer
Although tinted moisturizers are lighter in texture than full-coverage foundations, they still contain iron oxides and color pigments that interfere with light transmission. To maximize photobiomodulation benefits, wash off tinted products before starting your session.
What to Remove Before Facial or Body Light Therapy
Take a few minutes to remove the following products from your skin before initiating treatment:
- Sunscreen
- Foundation
- Concealer
- BB or CC cream
- Tinted moisturizer
- Heavy moisturizers
- Thick facial oils
- Waterproof makeup
- Self-tanner
- Body makeup and shimmer lotions
A complicated skincare prep routine is unnecessary; a gentle water-based cleanser followed by patting the skin dry is sufficient.
Which Products Are Best Applied After Your Session?
Once your red-light therapy session is complete, your skin is primed to receive active topical formulations. Recommended post-session options include:
Hydrating Moisturizers
Look for barrier-supporting ingredients such as:
- Ceramides
- Glycerin
- Hyaluronic acid
- Squalane
Peptide Serums
Peptides complement collagen-boosting regimens and are ideal for post-session application.
Niacinamide
Niacinamide (Vitamin B3) is well tolerated across all skin types and helps soothe skin while supporting barrier recovery.
Sunscreen
If treating skin during daylight hours, always conclude your routine with a broad-spectrum sunscreen. [4]
Red-light therapy does not replace photoprotection, so never skip daily sunscreen application before outdoor sun exposure.
How Morning and Evening Skincare Order Should Look
For maximum efficacy, administer light therapy directly after cleansing and before applying heavy occlusives or active treatments.
Morning: Cleanser → Red Light Therapy → Lightweight Serum (optional) → Moisturizer → Sunscreen → Makeup.
Evening: Makeup Remover (if needed) → Cleanser → Red Light Therapy → Targeted Serums → Moisturizer.
If retinol or retinoids are part of your nightly routine, apply them after your red-light therapy session. This sequence minimizes potential light degradation of active ingredients and prevents barrier irritation.
Common Mistakes to Avoid
Avoid these frequent application errors during light therapy:
- Using red light therapy over full-coverage makeup
- Applying sunscreen prior to indoor sessions
- Applying thick facial oils right before treatment
- Failing to thoroughly cleanse environmental residue from the skin
- Using heavy occlusives that leave a reflective film over target areas
Clear Timing Delivers Better Treatment Outcomes
Red-light therapy relies on an unobstructed light path to cellular chromophores. While wearing cosmetics during a session is not dangerous, it noticeably reduces energy density and clinical efficacy.
Keep your routine streamlined: cleanse first, complete your red light treatment, and follow with targeted skincare. This approach ensures consistent photobiomodulation delivery while easily integrating into your daily regimen.
Always follow device operating guidelines and choose skincare formulated for your skin type for safe and effective long-term results.
Frequently Asked Questions about Red-Light Therapy Use
Does moisturizer block red light?
A lightweight, water-based moisturizer that is fully absorbed will not significantly impede light. However, phototherapy remains most effective on clean, bare skin.
Can I wear eye makeup?
Eye makeup will not affect lower-face or targeted body treatments. For full-face sessions, remove all eye makeup and consistently wear certified protective eyewear as directed by your device manual.
Do I need to wash my face after each session?
No. If your skin was clean prior to treatment, you can proceed directly to applying your favorite serums, moisturizers, and daily sun protection.
References
- Cleveland Clinic. “Red Light Therapy: Benefits, Side Effects & Uses.” Cleveland Clinic, 1 Dec. 2021.
- Gracia-Cazaña T, Sánchez-Cano A, Aporta J, Gilaberte Y. Spectral Transmittance Analysis of Different Sunscreens Used in Daylight Photodynamic Therapy. Photodermatol Photoimmunol Photomed. 2025 Sep;41(5):e70040. doi: 10.1111/phpp.70040. PMID: 40731180; PMCID: PMC12307766.
- Cole C, Shyr T, Ou-Yang H. Metal oxide sunscreens protect skin by absorption, not by reflection or scattering. Photodermatol Photoimmunol Photomed. 2016 Jan;32(1):5-10. doi: 10.1111/phpp.12214. Epub 2015 Nov 10. PMID: 26431814.
- Sambandan DR, Ratner D. Sunscreens: an overview and update. J Am Acad Dermatol. 2011 Apr;64(4):748-58. doi: 10.1016/j.jaad.2010.01.005. Epub 2011 Feb 3. PMID: 21292345.
