Where to Buy Vitamin B12 in Cardiff

Vitamin B12 is one of the few supplements where deficiency is genuinely common, and where the consequences of not addressing it are serious. It is also the one supplement that vegans and vegetarians cannot avoid thinking about.

Why B12 matters

B12 is essential for three things your body cannot do without: producing red blood cells, maintaining the myelin sheath that protects your nerve fibres, and synthesising DNA. A prolonged deficiency leads to anaemia, nerve damage, and cognitive decline. What makes this particularly significant is that some of the neurological damage caused by long-term B12 deficiency is irreversible.

The good news is that the liver stores B12, and those stores can last years. The bad news is that this means deficiency develops slowly and often goes unnoticed until it is significant.

Who needs to pay attention

Vegans and vegetarians. B12 occurs naturally only in animal products — meat, fish, dairy, and eggs. It is not found in plants. There is no plant food that provides meaningful B12 in a form humans can absorb. Some fermented foods and algae contain B12 analogues, but these do not function as B12 in the human body and may actually interfere with absorption. If you eat a vegan diet and are not supplementing B12, you are not getting it.

Older adults. B12 absorption depends on a protein produced in the stomach called intrinsic factor. Production of intrinsic factor tends to decline with age. This is why B12 deficiency becomes more common in people over 50 regardless of diet.

People with digestive conditions. Crohn’s disease, coeliac disease, atrophic gastritis, and anyone who has had gastric bypass surgery can have impaired B12 absorption for the same reason — insufficient intrinsic factor or reduced stomach function.

People taking metformin. The diabetes medication metformin is known to reduce B12 absorption with long-term use. Regular monitoring and supplementation is often recommended.

Cyanocobalamin versus methylcobalamin

The two most common supplement forms of B12 are cyanocobalamin and methylcobalamin.

Cyanocobalamin is the synthetic form. It is stable, inexpensive to produce, and well-researched. The body converts it to the active forms it needs. It contains a small cyanide molecule (hence the name), but the amount is trivial and poses no health risk at normal doses.

Methylcobalamin is one of the active forms of B12 the body uses directly, without conversion. It tends to be better retained in tissue than cyanocobalamin and is the form most commonly found in sublingual tablets and oral sprays.

For most people, either form works. People with certain genetic variants affecting the MTHFR enzyme may process methylcobalamin more readily, though the evidence is mixed. If you have reason to prefer an active form, methylcobalamin is a reasonable choice.

How much to take

The NHS reference intake for B12 is 1.5 micrograms per day — a small amount. The complication is absorption efficiency. At low doses taken with food, absorption relies on intrinsic factor and is efficient. At higher doses, a small percentage is absorbed passively through the gut lining, independent of intrinsic factor — but only a fraction of the dose actually gets through.

This is why B12 supplements come in doses that look enormous relative to the reference intake. A 1,000mcg tablet is not excessive; it is calibrated for the reality of passive absorption. For vegans, a common recommendation is 1,000mcg daily or 2,000mcg several times a week.

Sublingual tablets and sprays

Sublingual tablets (dissolved under the tongue) and oral sprays deliver B12 through the mucous membranes, bypassing the digestive system and the intrinsic factor requirement entirely. This makes them particularly useful for older adults, people with absorption issues, or anyone who has had gastric surgery.

For healthy adults with no absorption concerns, regular tablets taken consistently work well. For those with known or suspected absorption issues, the sublingual or spray format is the more reliable option.

What we stock

We carry BetterYou’s B12 Boost Oral Spray at all three Beanfreaks stores — a sublingual spray delivering methylcobalamin directly through the oral mucosa. We also stock Solgar sublingual B12 tablets for those who prefer a traditional format.

Come in and ask if you are not sure which option suits you best. B12 is one of the supplements we talk about most, particularly with customers who are transitioning to a plant-based diet.

• Roath: 95 Albany Road, CF24 3LP
• Canton: 124 Cowbridge Road East, CF11 9DX
• Royal Arcade: 8 Royal Arcade, Morgan Quarter, CF10 1AE

Get in touch to check stock at your nearest store.