Follow us on our new Insta page »

Magnesium Ascorbyl Phosphate

Also-called-like-this: Form of Vitamin C, MAP
What-it-does: skin brightening, antioxidant


A form of skincare superstar, Vitamin C. If you do not know, what the big deal about Vitamin C is, click here and read all about it, we will wait here for you. 

So now you know that pure vitamin C (aka ascorbic acid, AA) is really unstable and hard to formulate so the cosmetics industry is coming up with a bunch of derivatives to solve the problem and Magnesium Ascorbyl Phosphate (or MAP) is one of them.  

MAP does solve the stability problem: it's stable up to pH 7, so far so good. What is not so good is that, as the great review study about vitamin C derivatives in the Journal of Cosmetic Dermatology writes, MAP is "at very best, poorly absorbed in comparison to AA." 

Moreover,  derivatives not only have to be absorbed into the skin, they also have to be converted into pure AA. The good news is that in-vitro data shows that MAP does convert, but the bad news is we do not really know if the same is true on real, living human skin. Even if it does, we don't know how good the conversion rate is (but to be fair the same is true for all other derivatives).

Regarding the three magic abilities of pure vitamin C (antioxidant, collagen booster, skin brightener), there is no published data about MAP's antioxidant or photoprotection capabilities. We have better news about the other two things: in-vitro data shows that MAP can boost collagen synthesis similar to AA (though in the case of AA it's proven in-vivo) and even better, MAP is proven to work as a skin brightener in-vivo (on real people). 

Bottom line: when it comes to vitamin C derivatives, MAP is definitely an option. We especially recommend it if you are after skin brightening as this seems to be the strongest point of MAP. 


Show me some proof

  • Journal of Cosmetic Dermatology, Volume 11 (4) – Dec 1, 2012, Stability, transdermal penetration, and cutaneous effects of ascorbic acid and its derivatives

Products with a known amount of Magnesium Ascorbyl Phosphate

Other products with Magnesium Ascorbyl Phosphate

100% Pure Sérum De Noche Multi-Vitamin + Antiox Atypical Skincare Glow Getter Daily Serum Beautybio The Daily Vitamin C + Antioxidant Day Serum Beyoutiful Vitamin C, Hyaluronic acid, E vitamin serum Circadia Vitamin C Reversal Serum DMK Direct Delivery Vitamin C Antioxidant Serum Dermalogica Map-15 Regenerator Diadermine Lift+ Revitalisierender Vitamin C Booster Dr. Lili Fan Probiotic All In One Microdermabrasion Kit Fiery Youth Vitamin C 30% Serum JB SkinGuru Lumi La Crème Éclat Le Mieux Vita-C Serum Makhai Vitamin C Face Serum Nuva Skin Vitamin C Serum PHI Cosmetics C2 Maximum Vitamin C Serum Timeless Hyaluronic Acid Vitamin C Serum silk naturals Facelift Vitamin C, DMAE & Peptide serum Andalou Naturals Turmeric + C Enlighten Serum Hada Labo Shirojyun Deep Whitening Cream Hada Labo Shirojyun Premium Whitening Emulsion Hada Labo Shirojyun Premium Whitening Lotion Light Hada Labo Shirojyun Premium Whitening Lotion Rich Image Vital C Hydrating Anti-Aging Serum Le Mieux Marine Amino Vita-C Serum Mamaearth Skin Illuminate Face Serum Mukti Organics Age Defiance Night Serum Neemli Naturals Retinol And Peptide Serum SkinPep Super C15 Serum The Ordinary Magnesium Ascorbyl Phosphate 10% Yeouth Vitamin C & E Day Serum With Hyaluronic Acid it Cosmetics Bye Bye Pores Poreless Finish Airbrush Powder Beauty Counter Counter+ Brightening Facial Mist Beauty Pie Superdose Vitamin C Freeze Dried Ampoules Beyer&Söhne Hautgel+ Anti-Aging DrGL Toner Lightening Hey gorgeous Vitamin C Wrinkle Reversing Serum Kate Ryan Collagen Booster Intense Repair Serum Le Mieux Vita C Clear Pads Me-Just For You Vitamin C Serum Skin Actives Antioxidant Serum Skin doctors Gamma Hydroxy Aesop B Triple C Facial Balancing Gel Air Repair Super Hydrating Eye Cream Air Repair Super Hydrating Eye Cream Arcona Instant Magic Reversal Serum Ausceuticals Collagen Serum Ausceuticals Vitamin B Serum Ausceuticals Vitamin B Serum (Reformulated) DrGL Moisturiser All Skin Types Earth Rhythm CLEAR SKIN - VITAMIN C, BIO-RETINOL, SALICYLIC ACID & HYALURONIC ACID