What Is Magnesium Ascorbylborate?
Magnesium Ascorbylborate is a lab-crafted ingredient that joins vitamin C (ascorbic acid) with boric acid then stabilizes the blend with magnesium. The result is a salt that carries the antioxidant power of vitamin C while gaining extra stability from boron and magnesium. It was developed as chemists searched for vitamin C options that resist oxidation and stay active longer in creams and serums. By the late 2000s formulators started adding it to brightening and age-defying products because it kept its punch even in water-based formulas.
Production starts with purified ascorbic acid and boric acid dissolved in controlled pH conditions. Magnesium ions are introduced, causing the mix to form a solid salt that is then filtered, washed and dried into a fine powder. This powder disperses easily in water or glycerin, making it friendly for both cold-processed and heated emulsions.
You will most often spot Magnesium Ascorbylborate in lightweight serums, daily moisturizers, sheet masks, eye creams, after-sun gels and specialty treatments aimed at boosting radiance or evening skin tone.
Magnesium Ascorbylborate’s Cosmetic Benefits/Uses
Formulators choose this ingredient because it offers several helpful actions for the skin.
- Antioxidant – helps neutralize free radicals from UV light and pollution which can otherwise speed up visible aging
- Humectant – attracts water to the skin surface supporting a fresher plump look and improving product spreadability
- Skin conditioning – contributes to a smoother softer feel and can help brighten an uneven complexion over time
Who Can Use Magnesium Ascorbylborate
This vitamin C derivative is generally well tolerated by all skin types, including oily, dry, combination and even most sensitive complexions because it is less acidic than pure ascorbic acid. Those with extremely reactive skin or a known sensitivity to borates should proceed cautiously, but such cases are uncommon.
The ingredient is synthesized from mineral salts and lab made vitamin C so it contains no animal derived material, making it suitable for both vegans and vegetarians.
No studies flag Magnesium Ascorbylborate as unsafe during pregnancy or breastfeeding when used topically in typical cosmetic concentrations. That said, this is not medical advice and anyone who is pregnant or nursing should show the full ingredient list of any product to a qualified healthcare professional before use to be on the safe side.
The molecule does not induce photosensitivity. In fact its antioxidant action can help buffer some free radical stress that occurs after sun exposure, though it is not a substitute for sunscreen.
Potential Side Effects/Adverse Reactions
Reactions to Magnesium Ascorbylborate vary from person to person. The points below outline potential side effects, but most users will not experience them when the ingredient is included at normal cosmetic levels.
- Mild stinging or tingling in very sensitive skin during the first few applications
- Temporary redness if applied to compromised or freshly exfoliated skin
- Dry patches when layered with multiple strong actives that disrupt the skin barrier
- Allergic contact dermatitis in the rare event of a boron or vitamin C derivative allergy
If any of these effects occur discontinue use and consult a healthcare professional for guidance.
Comedogenic Rating
Rating: 0 / 5
Magnesium Ascorbylborate is a lightweight water-soluble salt that does not leave an oily film on the skin. It sits on the surface long enough to deliver antioxidant and moisture-binding benefits then rinses or absorbs away without blocking pores. Because it lacks heavy oils or waxes it earns a solid 0 on the comedogenic scale.
That makes it a good choice for people who are prone to acne or frequent breakouts.
No data suggest it worsens blackheads or whiteheads even when used alongside richer formulas. Of course a product’s overall pore-clogging risk also depends on the other ingredients in the mix.
Summary
Magnesium Ascorbylborate delivers an easy-to-use form of vitamin C that fights free radicals, binds water for a plumper look and smooths skin texture. It does this by pairing ascorbic acid with boron and magnesium which shield the vitamin from early oxidation and let it stay active longer in water-based skincare.
The ingredient is still a bit of a hidden gem compared with better known vitamin C derivatives, yet formulators who want stability without harsh acidity are starting to use it more often in serums masks and moisturizers.
Topical safety data show a low risk of irritation, allergy or pore blockage when the salt is used at normal cosmetic levels. As with any new skincare step it is wise to patch test first to make sure your skin agrees with the full formula.