VITAMIN B12 (CYANOCOBALAMIN)
TYPE OF INGREDIENT
Vitamin and topical therapeutic agent
COMMONLY FOUND IN
Topical creams, ointments, supplements, fortified foods, and cosmetic products
WHAT ARE THE BENEFITS OF B12?
Vitamin B12 is essential for cell metabolism, red blood cell formation, and neurological function. Vitamin B12 has also been shown to exhibit anti-inflammatory properties and potentially acts as an antioxidant, leading to its use in a variety of dermatologic conditions including atopic dermatitis, seborrheic dermatitis, and psoriasis. Vitamin B12 may also act as a mast cell stabilizer, potentially reducing flares of mast cell diseases such as chronic urticaria and mast cell activation syndrome.
WHAT IS B12?
Vitamin B12, also known as cyanocobalamin, is a water-soluble vitamin naturally found in animal products and fortified foods. Topical formulations of Vitamin B12 are often characterized by a reddish-pink color. In dermatological applications, it is used topically as an anti-inflammatory agent to soothe irritated skin, particularly in conditions like atopic dermatitis.
IS B12 SAFE FOR ALL SKIN TYPES AND TONES?
Vitamin B12 is generally safe for most skin types and tones when used topically, with minimal risk of irritation or sensitization. However, potential side effects include rare instances of contact dermatitis or allergic reactions, particularly in individuals sensitive to cobalt or cyanocobalamin. Pigmentary issues are uncommon, but temporary redness or pink staining from the formulation may occur, especially with high concentrations. These effects typically resolve without long-term pigmentation changes. Patch testing is recommended for those with a history of sensitivities.
WHAT SKIN ISSUES OCCUR WITH VITAMIN B12 DEFICIENCY?
Vitamin B12 deficiency can lead to various dermatological manifestations, including hyperpigmentation (particularly on the hands, feet, and mucous membranes), vitiligo-like depigmentation, angular cheilitis, and glossitis (inflamed tongue). Deficiency may also cause hair thinning, brittle nails, and a predisposition to skin infections due to impaired immune function. These symptoms are more common in individuals with dietary deficiencies (e.g., vegans) or malabsorption conditions (e.g., pernicious anemia).
CONTRAINDICATIONS
There are no major contraindications for topical Vitamin B12 use in dermatology. However, individuals with known allergies to Vitamin B12 or cobalt-containing compounds should avoid its use and consult a dermatologist if reactions occur.
Sources:
- Stücker M, Memmel U, Hoffmann M, et al. Vitamin B12 cream containing avocado oil in the therapy of atopic dermatitis. Dermatology. 2001;203(2):141-7. PMID: 11586013.
- Lio P. Non-pharmacologic therapies for atopic dermatitis. Curr Allergy Asthma Rep. 2013 Oct;13(5):528-38. doi: 10.1007/s11882-013-0371-y. PMID: 23881511.
- Brescoll J, Daveluy S. A review of vitamin B12 in dermatology. Am J Clin Dermatol. 2015 Feb;16(1):27-33. doi: 10.1007/s40257-014-0107-3. PMID: 25559140.
- Anogeianaki A, Castellani ML, Tripodi D, Toniato E, De Lutiis MA, Conti F, Felaco P, Fulcheri M, Theoharides TC, Galzio R, Caraffa A, Antinolfi P, Cuccurullo C, Ciampoli C, Felaco M, Cerulli G, Pandolfi F, Sabatino G, Neri G, Shaik-Dasthagirisaheb YB. Vitamins and mast cells. Int J Immunopathol Pharmacol. 2010 Oct-Dec;23(4):991-6. doi: 10.1177/039463201002300403. PMID: 21244748.
