{"schema_version":"2026-06-12","source":"https://hervitals.co.uk/api/","license":"https://creativecommons.org/licenses/by/4.0/","disclaimer":"Information only, not medical advice, and not a substitute for a registered clinician. Supplements are regulated as food, not medicines, and cannot legally claim to treat, prevent or cure any condition. Only EFSA-authorised wording such as \"contributes to normal ...\" is permitted. Always read product labels and speak to your GP or pharmacist before starting a supplement, especially if you are pregnant, breastfeeding or taking other medication. Her Vitals earns affiliate commission on some products it links to.","supplement":{"slug":"vitamin-b12","name":"Vitamin B12","efsa_roles":["contributes to normal energy-yielding metabolism","contributes to normal functioning of the nervous system","contributes to normal red blood cell formation","contributes to the reduction of tiredness and fatigue"],"buying_points":["B12 has no reliable plant source, so anyone following a vegan diet is specifically flagged by the NHS as needing a supplement or fortified foods, not just \"most vegans\".","Absorption issues are common in older adults and those on certain medications (including long-term metformin or PPIs); if you are in either group and feel persistently tired, mention it to your GP rather than assuming a supplement will fix it.","Forms vary (cyanocobalamin, methylcobalamin); the amount in micrograms on the label matters more than the form for most people, so compare that first.","Unexplained tiredness, tingling or memory problems should be checked with a blood test before self-treating, since B12 deficiency has specific causes that supplementing alone will not address."],"brands":[{"brand":"BetterYou","product":"B12 Oral Spray","retailer":"BetterYou","form":"Oral spray (methylcobalamin)","suits":"Preferring a spray to a tablet","note":"UK oral-spray format; check the microgram amount per spray."},{"brand":"Wild Nutrition","product":"Food-Grown B12","retailer":"Wild Nutrition","form":"Capsule (food-grown)","suits":"Preferring a food-grown format","note":"Food-grown delivery; women-focused UK brand."},{"brand":"Bulk","product":"Methylcobalamin B12","retailer":"Bulk","form":"Tablet (methylcobalamin)","suits":"Wanting a low-cost everyday option","note":"Budget methylcobalamin from a UK supplier; check the microgram amount."},{"brand":"Vitabiotics","product":"Ultra Vitamin B12","retailer":"Vitabiotics","form":"Tablet","suits":"Wanting a widely stocked high-street option","note":"Widely available UK B12 supplement; compare the microgram amount on the label."}],"url":"https://hervitals.co.uk/vitamin-b12/"}}