The best vitamin B12 supplements for energy, focus and long-term health
Vitamin B12 doesn’t have the cult aura ofmagnesiumor the glow-up narrative ofcollagen. No one’sdry-scoopingit before a workout, nor is it trending on wellness TikTok. And yet, if your energy has quietly. . .
Vitamin B12 doesn’t have the cult aura ofmagnesiumor the glow-up narrative ofcollagen. No one’sdry-scoopingit before a workout, nor is it trending on wellness TikTok. And yet, if your energy has quietly flatlined, your concentration feels unreliable or your gym performance has started to stall for no obvious reason, B12 is the micronutrient worth paying attention to. GQ's best vitamin B12 supplements at a glance…Best vitamin B12 supplementWild Nutrition Food-Grown B12 PlusJump to reviewBest luxury B12 supplementErewhon Methyl B12 & Folate + P-5-PJump to reviewOn paper, it’s dull stuff: red blood cell formation, nervous system function, DNA synthesis. In reality, it’s one of the most commonly overlooked deficiencies in the UK – particularly among vegetarians, vegans and anyone whose diet leans more “grab-and-go” than thoughtfully balanced. This isn’t an optimisation flex or a biohacker’s badge of honour. It’s foundational. Before you add another glossy supplement to your morning stack, it’s worth getting the basics right. Here’s what actually matters when it comes to vitamin B12 – and how to supplement it properly if you need to. How we choose the best vitamin B12 supplementsAs we’ve said before, if you suspect a vitamin B12 deficiency is affecting your day-to-day energy, focus or overall health, you’d be much better off speaking to a GP thanGQ. For this guide, we’ve focused on real-world usability rather than lab claims alone. A regular contributor to GQ’s fitness and wellbeing content,Aaron Toumazouis a dedicated CrossFitter, runner and cyclist who is currently undertaking his personal trainer qualifications. He brings a performance-led, evidence-informed perspective to supplementation, shaped by both structured training and personal experimentation through various periods of vegetarian and vegan training. His consideration factors in how easy each product is to integrate into a daily routine (from capsules to sprays), how well it’s tolerated under consistent use, and whether a brand’s approach is grounded in credible nutritional thinking rather than marketing noise. Where relevant, we’ve also drawn on expert input to sensecheck claims around absorption, dosage and form. What are the best vitamin B12 supplements for men?Best vitamin B12 supplement: Wild Nutrition Food-Grown Vitamin B12 PlusWild NutritionFood-Grown B12 PlusWild Nutrition’s Food-Grown B12 combines vitamin B12 with plant-based cofactors, aiming to mimic how nutrients naturally occur in whole foods. This gentler and more holistic formulation is easy on the stomach while supporting energy metabolism, nervous system health and overall cellular function. It’s a sensible, daily-use option that feels thoughtful rather than gimmicky. Best vitamin B12 multivitamin: Heights Vitals+HeightsVitals +Heights’ Vitals+ takes a broader, brain-first approach. Rather than megadosing B12, it includes it as part of a tightly formulated multivitamin alongside omega-3, vitamin D, magnesium and various other cognitive-supporting nutrients. It’s less about fixing a deficiency in isolation and more about covering multiple nutritional bases in a single hit, especially appealing if your diet is inconsistent or you want a simplified routine. Best luxury B12 supplement: Erewhon Methyl B12 & Folate + P-5-PErewhonMethyl B12 & Folate + P-5-PA premium, practitioner-style blend combining methylcobalamin, folate, and P-5-P (active vitamin B6), this formula is designed for optimal absorption and broader B-vitamin support. It’s more than just B12 – it’s about supporting all-round energy, cognitive function and nervous system health. Pricey, yes, but high-quality ingredients and considered formulation justify the cost for those seeking a top-tier option. Think of it as the viralHailey Bieber Strawberry Glaze skin smoothieof B12 supplements. Thorne Vitamin B12ThorneVitamin B12Thorne’s methylcobalamin capsules offer a practitioner-trusted approach to B12 supplementation. As the methylcobalamin form is the “active” variant naturally used by the body, this is a solid choice for anyone looking for efficient absorption and reliable energy support. Simple, well-studied and easy to integrate into your routine, it’s a supplement you can trust without overthinking it. Dr Vegan Vitamin B12Dr VeganVitamin B12Dr Vegan’s B12 capsules are an affordable, no-frills option in cyanocobalamin form. Easy to swallow and effective for daily use, this supplement is perfect for plant-based diets or anyone who wants a reliable B12 top-up without fuss or high cost. Straightforward, accessible and effective, it covers the basics with confidence. Holland & Barrett High Strength Slow Release Vitamin B12Holland & BarrettMax Strength Slow Release Vitamin B12This 1000µg slow-release B12 tablet is designed to maintain steady levels throughout the day, reducing the need for multiple doses. High-strength yet convenient, it’s ideal for busy lifestyles or anyone wanting to pair supplementation with daily routines. While absorption still follows natural limits, the slow-release format can be gentler on digestion and more convenient for long-term use. BetterYou Vitamin B12 Oral SprayBetterYouVitamin B12 Daily Oral SprayThis pill-free B12 spray is all about convenience and fast absorption. It bypasses the digestive tract to deliver a quick daily hit, making it ideal for travel, picky pill-takers or anyone who simply doesn’t want to add more tablets or capsules to their routine. Affordable and portable, it’s an easy way to stay consistent without fussing over timing or digestion. What is vitamin B12?Vitamin B12 – also known as cobalamin – is essential for red blood cell production, neurological function and DNA synthesis. In plain English: it keeps your brain sharp, your nerves firing and your oxygen transport system doing its job. Unlike many other vitamins, B12 is found almost exclusively in animal products – meat, fish, dairy and eggs. That makes it a clear pressure point for plant-based diets. But deficiency isn’t limited to vegans. Absorption efficiency declines with age, and certain gut conditions can reduce uptake even when intake looks solid on paper. Low B12 levels can show up as persistent fatigue, weakness, brain fog, low mood and even numbness or tingling in hands and feet. Left unchecked long-term, a deficiency can become serious. The upside? Once identified, it’s usually straightforward to correct. How much vitamin B12 should I take?Before adding the most expensive B12 supplement you can find to your basket, registered nutritional therapist Annie Winter advises getting your levels checked with a blood test. “Supplementing B12 will only make a difference if you have insufficient or deficient levels of B12,” she tells GQ. “If very low levels are seen then they may see very fast symptom improvement following high-dose B12 injections via their GP. Supplementing can take a while longer to bring levels up to adequate, but can be a more accessible way to improve your levels. ”In the UK, adults are advised to get about 1. 5 micrograms (mcg) a day. That’s enough for most omnivores to stay out of deficiency territory. Supplements, however, often come in doses of 50, 100, even 1000 mcg. Sound excessive? Here’s the nuance: your gut can only absorb so much at once. A big dose mostly relies on passive absorption – a small percentage sneaks into your system regardless of stomach chemistry. So swallowing 1000 mcg doesn’t mean 1000 mcg ends up in circulation, and that’s perfectly fine. For most meat eaters without deficiency, 10–50 mcg daily is enough. Vegetarians and vegans might benefit from 50-150 mcg daily, or 1000 mcg a few times a week. More isn’t automatically better, but in B12’s case, bigger doses are usually practical, not performative. If you have a diagnosed deficiency, follow your doctor’s advice. That could mean high-dose tablets or injections, but that’s a medical conversation, not a TikTok wellness hack. What form of vitamin B12 should I take?You’ll typically see B12 supplements in two main forms. Cyanocobalamin is the most common, well-studied, stable and effective for most people. “It’s also cheaper to produce and more ‘shelf-stable’, in that it is less affected by light, for example,” says Winter. “Once consumed, it requires enzymes to convert it into an ‘active’ form that the body’s cells can use. ”Methylcobalamin is marketed as “active” and naturally found in the body. “Methylcobalamin is ‘pre-converted’ so it’s more bioavailable,” says Winter. “But it is less stable so you would need to ensure you store this supplement well away from light and heat. For the vast majority of supplement-takers, a simple oral tablet – cyanocobalamin or methylcobalamin – does the job. Sublingual tablets and sprays are convenient, but research shows standard pills are just as effective. Branding hype aside, it’s largely about consistency, not form. “B12 can only be absorbed in the gut with the presence of something called intrinsic factor, which is produced by cells in the stomach lining,” Winter says. “If intrinsic factor is missing or low – for example for those with pernicious anaemia – then absorption could be an issue. Those with chronic inflammation in the intestines – conditions such as Crohn’s disease – will have reduced ability to absorb B12, too. In these cases, a liquid B12 may be most beneficial as it is absorbed under the tongue, bypassing the digestive system altogether and entering the blood stream much more quickly. ”Unlike some trendy supplements, timing isn’t critical. Research indicates that taking it with breakfast, lunch, dinner, or mid-afternoon snack won’t make a dramatic difference. What does matter is habit. B12 stores can last a while, but once depleted, it takes time to rebuild, especially if your diet is plant-based. Occasional dosing is like expecting your phone to fully charge if you only plug it in for five minutes.