Pepha®-Age (Micro-Algae)
This patented ingredient from the most potent micro-algae combats the harmful blue light exposure to prevent accelerated skin aging and hyperpigmentation.
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Blue light emitted from computer and cell phone screen causes oxidative stress, damaging lipids, proteins and DNA of skin cells. Chronic blue light exposure leads to a dull, uneven complexion and loss of skin firmness. Most sunscreens only protect against outdoor UV rays but not blue light.
Our defense serum, designed for screen-stressed skin, is your digital "SPF" (screen protection factor). Powered by high concentrations of antioxidants and Pepha®-Age—a clinically proven, patented blue light blocking ingredient, this serum packs a punch, delivering the blue light protection that your typical sunscreen doesn't. With its buttery-smooth texture that glides into skin, it shields against blue light damage, brightens skin tone, and restores elasticity—all in a day's work.
*Your satisfaction is our priority. We offer a 30-day money back guarantee on all products.
SIZE: 30 ml / 1 fl oz
Anti-Blue Light Brightening Serum
Product Benefits
Pepha®-Age (Micro-Algae)
This patented ingredient from the most potent micro-algae combats the harmful blue light exposure to prevent accelerated skin aging and hyperpigmentation.
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Rice Bran Seed Extract
Brightens and evens skin tone while protecting from radiation, free radicals and repairing damage with rich antioxidant properties.
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View Full Ingredient List
add removeWater, Glycerin, Helianthus Annuus (Sunflower) Seed Extract, Rosmarinus Officinalis (Rosemary) Extract, Oryza Sativa (Rice Bran) Seed Extract, Scenedesmus Rubescens (Mirco-Algae) Extract, Polyacrylamide, C13-14 Isoparaffin, Phospholipids (Ceramide), Sodium Ascorbyl Phosphate (Vitamin C), Laureth-7, Tocopherol (Vitamin E), BHT, Sodium Hyaluronate, Phenoxyethanol, Ethylhexylglycerin
All-day application
To protect your skin from harmful blue light while on your phone or computer—a glow-getting formula that defends, brightens and restores complexion in a single step.
30% reduction in the appearance of hyperpigmentation
34% enhance collagen production
Learn more about products in our FAQs.
*From an in vivo study conducted on 33 females, between the ages of 21 to 41, who applied formulations containing 3% of Pepha®-Age (the most potent micro-algae) once daily for 34 days. Our product contains 3%.
"As a dermatologist, I value formulations that are gentle enough for daily maintenance. Matter of Monday's products are clean and gentle, while also protecting against everyday environmental stressors. It’s a thoughtful, science-driven approach to skincare."
Dr. Ryan Turner, MD
Board-Certified Dermatologist
As Seen in REAL SIMPLE:
“Many people swear by retinol products when it comes to anti-aging, but Dr. Debbie Palmer says retinol can irritate the skin and exacerbate dryness in the winter.
If you suspect your retinol treatment is parching your skin, opt for a skin-renewing lotion with a gentler formula that contains loads of hydrating ingredients. Dr. Palmer recommends this Matter of Monday moisturizer, a lightweight formula infused with microalgae extract, aloe, and hyaluronic
acid to soothe and quench your skin.”
Dr. Debbie Palmer, MD
Board-Certified Dermatologist
"What makes Matter of Monday's Anti-Blue Light Brightening Serum exceptional is its dual-action formulation — it not only protects the skin from digital pollution but also supports its natural repair processes overnight. In my practice, this kind of protection against blue light is the missing link in many skincare routines — and this serum finally fills that gap."
Dr. Jame Heskett, MD
Longevity/Anti-Aging Doctor
“As a functional medicine doctor, my focus is always on preventing issues before they arise, and that includes skin health. That's why I’m proud to support Matter of Monday's skincare line. This brand is taking a proactive, root-cause approach to skincare—helping people address the real sources of skin damage. It's refreshing to see a company prioritize the health of the skin at a deeper, more sustainable level.”
Dr. Michelle Hirsch, DACM
Functional Medicine Doctor
“I've been impressed with Matter of Monday and their use of gentle yet effective ingredients. I especially like their focus on bluelight skin protection, a niche that is relevant to our evolving modern-day needs. I enjoy using these products myself and also recommend them to my patients.”
Dr. Ginger Xu, MD
Board Certified Plastic Surgeon
I've tried many skincare products, and I've finally found a serum that's powerful with antioxidants and moisturizing without being harsh, And as a heavy laptop user, it also provides skin with blue light protection from the screen.
I have been very much enjoying all the products of Matter of Monday. The Blue Light serum has actually become a personal favorite.
I use it to protect my skin in front of computers. After putting it on, my skin feels nurtured and hydrated. It has a natural glow. So impressed.
My wife bought this for me as I spend a lot of time in front of the screens. I love it's unscented, lightweight, easy to open, dispense and close. I can take it with me to travel too. It gets me into the skincare habit. A perfect skincare product for a guy.
Smart product to protect against the blue light on screen. It compliments my blue light glasses. Love how light weight and smooth it is. I use it before moisturizer and makeup. It layers well without pilling.
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