Cyanocobalamin: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 24, 2025
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All information on this page is verified using publicly available nomenclature standards and reference materials from The Personal Care Products Council (PCPC) and the European Commission's CosIng database. Our analyses are based on technical data from these sources to ensure accuracy and reliability.

What Is Cyanocobalamin?

Cyanocobalamin is a lab made form of vitamin B12, the bright red nutrient best known for supporting healthy energy levels inside the body. In skin care, it appears as a water soluble powder or liquid that blends easily into creams and serums. The compound was first isolated in the late 1940s during research on vitamin deficiencies, and formulators soon noticed its stable color and gentle nature made it useful in topical products. Today manufacturers create cyanocobalamin through a controlled fermentation process using friendly bacteria that naturally produce vitamin B12, followed by purification and the addition of a small cyanide group that keeps the molecule steady on the shelf. You will find it in hydrating masks, daily moisturizers, soothing after sun gels, brightening eye creams and anti aging treatments that aim to keep skin soft and balanced.

Cyanocobalamin’s Cosmetic Benefits/Uses

As a skin conditioning agent cyanocobalamin helps skin feel smooth and comfortable. It supports the natural moisture barrier so the surface stays hydrated, which can reduce the look of dryness and flakiness and give the complexion a healthier glow.

Who Can Use Cyanocobalamin

Cyanocobalamin is gentle enough for nearly all skin types including dry, normal, combination and oily complexions. Its water based nature means it will not clog pores, so even acne prone skin can usually tolerate it. People with very reactive or allergy prone skin may still wish to monitor how their skin feels, as with any new cosmetic ingredient, but reports of intolerance are rare.

Because most cosmetic grade cyanocobalamin is produced through bacterial fermentation rather than animal extraction, it is considered suitable for vegans and vegetarians. Always check the overall product label though, as other ingredients in the same formula might not share that status.

No evidence suggests that topical cyanocobalamin poses a risk to women who are pregnant or breastfeeding when used as directed in over the counter products. This is not medical advice; anyone who is expecting or nursing should discuss any skincare routine with their physician to be extra safe.

The ingredient does not cause photosensitivity, so it will not make skin more prone to sunburn. It also plays well with common actives like vitamin C, niacinamide and retinoids without destabilising them.

Potential Side Effects/Adverse Reactions

Side effects from applying cyanocobalamin to the skin can vary from person to person. The issues listed below are possible yet uncommon when the ingredient is used correctly in a well formulated product.

  • Temporary redness or warmth at the application site
  • Mild itching or stinging in very sensitive individuals
  • Rare cases of contact dermatitis for those allergic to vitamin B12 derivatives
  • Pinkish staining of light fabrics if product is not fully absorbed before dressing

If you notice any of these reactions stop using the product and seek guidance from a healthcare professional or dermatologist.

Comedogenic Rating

Cyanocobalamin earns a comedogenic rating of 0. This water soluble vitamin does not contain heavy oils or waxes that can lodge in pores and it dissolves completely in the watery phase of a formula. Because it simply conditions the surface and supports moisture balance without leaving a greasy film, it is considered non pore clogging. In short, the ingredient is suitable for people who are prone to acne or frequent breakouts. One added bonus is that its low use levels in skincare, usually well under 1 percent, keep the overall oil load of a product minimal, further limiting any chance of congestion.

Summary

Cyanocobalamin is a lab made form of vitamin B12 that works as a skin conditioning agent, helping skin hold on to water so it feels smooth and looks healthier. By reinforcing the moisture barrier it can ease flakiness and dullness, giving the complexion a fresher vibe. Although not a headline making active like retinol or vitamin C, it appears quietly in a variety of moisturizers, masks and after sun gels where it lends stability, a gentle touch and a subtle rosy tint.

Topical use of cyanocobalamin is viewed as very safe for the vast majority of people, with only rare reports of irritation or allergic reaction. As with any new skincare ingredient it is wise to perform a small patch test before full use, just to ensure your skin agrees with it.

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