This Vitamin B12 product provides the coenzyme form adenosylcobalamin, which the body can use directly, without needing to convert from less active forms. It’s designed to help support energy production, healthy nerve function, red blood cell formation and overall well-being.

Lead busy, active or high-demand lifestyles where energy, brain clarity or nervous-system support matter

Our Vitamin B12 Adenosylcobalamin capsules deliver the active, usable form of B12 in a clean, reliable formula. Manufactured in our UK facility under strict quality standards, with only purposeful ingredients and no unnecessary fillers or additives. You can feel confident you’re choosing B12 support that meets your standards for transparency, integrity and effectiveness.

Despite its presence in food, B12 absorption can be challenging due to a complex process involving stomach acid, digestive enzymes, and specific transport proteins. After being released from food in the stomach, B12 binds to haptocorrin, is released again in the small intestine, and finally binds to Intrinsic Factor to be absorbed in the ileum. From there, it is transported via Transcobalamin II to body tissues. Any disruption in this pathway - due to low stomach acid, gut issues, or dietary restrictions - can impact B12 status.

Vitamin B12 deficiency can affect anyone at any age, but certain groups are at higher risk. These include vegans and vegetarians, adults over 60, individuals with eating disorders such as anorexia or bulimia, and those taking medications like antacids or diabetes treatments that interfere with B12 absorption. People with a history of alcoholism, anaemia, or gastrointestinal conditions such as Crohn’s disease and IBS are also more vulnerable. Autoimmune conditions like type 1 diabetes, Addison’s disease, and SLE can increase risk, as can a family history of pernicious anaemia. Women with infertility or recurrent miscarriage, as well as infants born to or breastfed by deficient mothers, should also be aware of their B12 status.

What Is Adenosylcobalamin?
Adenosylcobalamin is a biologically active coenzyme form of vitamin B12, featuring a cobalt ion bound to a 5'-deoxyadenosyl group. It is primarily stored in the mitochondria - the energy-producing structures within cells - where it plays a vital role in converting methylmalonyl-CoA to succinyl-CoA, a key step in the citric acid cycle that supports energy production.

This form of B12 is significant for mitochondrial function and the metabolism of specific amino acids and fatty acids. In humans, it is found mainly in tissues such as the liver and is the dominant form in many non-human animals.

Metabolics Vitamin B12 (Adenosylcobalamin) Liquid offers an effective, bioavailable source of B12 in a convenient one-drop format, ideal for individuals seeking direct support for cellular energy metabolism.