10 Best B Complex Vitamins High Strength in The UK

Last updated on 12/08/2025

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Solgar Vitamin B-Complex "100" Extra High Potency Vegetable Capsules - Pack of 100 - Key Vitamin B Combination - For Increased Energy and Mental Performance - Vegan and Gluten Free

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Why We Love It

High potency B-complex dose.
Boosts energy and mental performance.
Sustainable, recyclable packaging.

Main Highlights

✓ KEY VITAMIN B COMBINATION - Vitamin B-Complex ''100'' is an extra high potency formulation delivering a 100 mg dose of key B vitamins. Many B vitamins are interdependent, and thus it is best to take them in combination, such as through a B-complex or a multiple vitamin containing a B-complex
✓ INCREASED ENERGY AND MENTAL PERFORMANCE - Solgar's unique formula delivers Thiamine (B1), Riboflavin (B2), Niacin (B3), Pantothenic Acid (B5), and Vitamin B6, along with other B vitamins such as Folic Acid, Biotin (B7) and Vitamin B12. B vitamins are essential nutrients required by the body. They help our bodies convert food into energy, allowing us to stay energised throughout the day, as well as supporting our mental performance
✓ NATURAL WELLNESS - We believe that cleaner is better, we craft our vitamins and minerals in small batches to help ensure consistency and purity from bottle to bottle
✓ COMMITTED TO SUSTAINABILITY - For over 70 years we've used 100% recyclable amber glass bottles. We believe that cleaner is better, we craft our vitamins and minerals in small batches to help ensure consistency and purity from bottle to bottle
✓ GOLD STANDARD - All Solgar products meet our industry recognized “Gold Standard” for excellence, made using naturally sourced ingredients and innovating since 1972

Solgar Vitamin B-Complex "100" Extra High Potency Vegetable Capsules - Pack of 100 - Supports Mental Performance and Reduces Fatigue - Vegan

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Why We Love It

Elevates energy and mental performance.
Promotes sustainability and natural wellness.
Guarantees gold standard excellence.

Main Highlights

Âœ“ UNLOCK ENERGY FROM FOOD - Solgar Vitamin B-Complex ''100'' is an extra high potency formulation delivering a 100 mg dose of key B vitamins
Âœ“ PERFECT BUSY OR ACTIVE LIFESTYLES - Solgarâ€s unique formula delivers Thiamine (B1), Riboflavin (B2), Niacin (B3), Pantothenic Acid (B5), and Vitamin B6, along with other B vitamins such as Folic Acid, Biotin (B7) and Vitamin B12. They help our bodies convert food into energy, allowing us to stay energised throughout the day, as well as supporting our mental performance
Âœ“COMMITTED TO SUSTAINABILITY - For over 70 years we've used 100 percent recyclable amber glass bottles
Âœ“NATURAL WELLNESS - We believe that cleaner is better, we craft our vitamins and minerals in small batches to help ensure consistency and purity from bottle to bottle
Âœ“GOLD STANDARD - All Solgar products meet our industry recognized â€œGold Standardâ€ for excellence, made using naturally sourced ingredients and innovating since 1947

Solgar Vitamin B-Complex 50 High Potency - Supports Mental Performance - Reduces Tiredness & Fatigue - Vegan - 100 Vegetable Capsules

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Why We Love It

Boosts mental performance and energy.
Promotes nervous system health.
Vegan, vegetarian, and kosher.

Main Highlights

✓ SUPPORTS MENTAL PERFORMANCE - Pantothenic Acid (Vitamin B5) contributes to normal mental performance
✓ REDUCES TIREDNESS & FATIGUE - Riboflavin (Vitamin B2), Niacin (Vitamin B3), Vitamin B6 and B12 contribute to the reduction of tiredness and fatigue and energy-yielding metabolism
✓ SUPPORTS NERVOUS SYSTEM & PSYCHOLOGICAL FUNCTIONS - Thiamine (Vitamin B1), Biotin (Vitamin B7), Niacin (B3) and Vitamin B6 contribute to normal nervous system and psychological functions
✓ SUITABLE FOR VEGANS - Solgar's Vitamin B-Complex 50 Vegetable Tablets are Vegan, Vegetarian and Kosher
✓GOLD STANDARD - All Solgar products meet our industry recognized “Gold Standard” for excellence, made using naturally sourced ingredients and innovating since 1954

Vitamin B Complex High Potency - 1 Full Year Supply - 8 Vitamins B1-B2-B3-B5-B6-B12, Biotin, Folic Acid & VIT D3 in 1 High Strength Micro Tablet - Reduction of Tiredness - Made in The UK by Nutravita

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Why We Love It

Year-long supply for value.
High potency with added benefits.
Quality tested ingredients.

Main Highlights

✔ NUTRAVITA'S ONE YEAR SUPPLY OF VITAMIN B COMPLEX MICRO TABLETS - Our high strength Vitamin B Complex with added Vitamin D3 provides extra value for you, as WE PROVIDE A FULL YEAR'S SUPPLY INSTEAD OF MARKET STANDARD OF 6 MONTHS FOR COMPARABLE PRICES. Due to the added Vitamin D3, our Vitamin B Complex is not vegan-friendly.
✔ HIGH PURITY & HIGH POTENCY VITAMIN B COMPLEX WITH VITAMIN D3 - Nutravita's Vitamin B Complex contains the perfect blend of the following 8 highly bio-available B-Vitamins: Vitamins B1 (Thiamin), B2 (Riboflavin), B3 (Niacin), B5 (Pantothenic Acid), B6 (Pyridoxine Hydrochloride), B7 (Biotin), B9 (Folic Acid), and Vitamin B12 (Methylcobalamin). Furthermore, our Vitamin B complex comes with added Vitamin D3 for extra support.
✔ SUPPORTS YOUR BODY - Our Vitamin B Complex with added Vitamin D3 supports the maintenance of normal hair, skin, bones, absorption of calcium, reduction of tiredness & fatigue, normal energy yielding metabolism, normal red blood cell production, and normal function of the immune system. As substantiated by the European Food Safety Authority (EFSA).
✔︎ QUALITY TESTED - Unlike many supplements, we haven't spared any expense on quality. Each ingredient is quality tested before the manufacturing process begins, every batch of our supplement undergoes further rigorous quality testing. We have done our best to provide as much information as possible, but if you do have any questions please reach out to our very helpful customer care team. They will be happy to provide personalised assistance to help this supplement fit into your lifestyle.
✔ WHAT IS THE STORY BEHIND NUTRAVITA? - Nutravita is a recognised and trusted Vitamins & Supplements brand providing thousands of customers across the world since 2014. Our high quality products are manufactured, batch tested and certified in the UK, and safeguarded by the highest manufacturing standards in the world (GMP, BRC). We have a dedicated team of pharmacologists, chemists and research scientists working to source the finest and most beneficial ingredients.

Vitamin B Complex High Strength Tablets - All Activated & Methylated B Vitamins Including Vitamin B12 and Folate, Vitamin B6, Vitamin B3, Vitamin B5, B1, B2, B8, VitaBright Methyl B Complex Vitamins

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Why We Love It

Supports energy and metabolism.
Perfect blend of B vitamins.
Superior bioavailability and absorption.

Main Highlights

HIGH DOSE, TINY TABLETS: Take all eleven B vitamins the easy way with our super-slim tablets. Our tablets may be small, but we encourage you to compare our doses to alternatives, as our much stronger doses offer much better value and benefits. Our complete formula contains ALL THE B VITAMINS in activated and METHYLATED forms underlines the superior quality of our vitamin B complex tablets. Take 2 tablets a day. Bottle lasts 2 months.
METHYLATED FOR BETTER ABSORPTION: These Vitamin B compound strong tablets contain the activated, body-ready forms of each B vitamin for maximum benefit and bioavailability, including methylated vitamins B12 and B9.

Liposomal Vitamin B Complex Liquid - High Strength B-Vitamin Complex Drops, Supports Immune System and Energy Levels, 60ml (Pack of 1)

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Why We Love It

Advanced and high potency formula.
Superior absorption for effectiveness.
Supports overall health.

Main Highlights

Advanced Formula: P!nkTribe's high-potency Vitamin B Complex liquid contains 8 essential B vitamins, including Thiamin (Vitamin B1), Riboflavin (Vitamin B2), Niacin (Vitamin B3), Pantothenic Acid (Vitamin B5), Vitamin B6, Biotin (Vitamin B7), Folic Acid (Folate), and Vitamin B12 (Methylcobalamin). Our perfectly proportioned formula provides you the best experience.
Superior Absorption: Our liposomal vitamin B complex drops are highly bioavailable, meaning that the active vitamin B forms can be instantly used by the body. With a liposome encapsulation rate of over 90%, our product effectively avoids the destruction of vitamin B by the digestive tract, greatly improving absorption.
Free Of Unneeded Additives: P!nkTribe vegan-friendly vitamin B complex liquid supplement contains no artificial colors or flavors, and is non-GMO, gluten-free, soy-free, and dairy-free. One milliliter a day gives you a healthy balance of B vitamins, and a 60ml bottle can be used for 2 months.
Overall Health Support: B vitamins play a crucial role in energy production, supporting the immune and nervous systems, and maintaining healthy skin, hair, and eyes. Incorporating our B complex supplement into your daily routine can help you maintain overall health.
Quality You Can Trust: Our vitamin B complex supplements are manufactured in the UK under strict manufacturing guidelines. We place the highest priority on purity, quality and safety. Each batch is carefully tested to ensure only the finest ingredients are used.

Vitamin B Complex - 365 Small Tablets (1 Year Supply) High Strength All 8 B Vitamins B1-B2-B3-B5-B6-B12, Biotin, Folic Acid and Vitamin C - Reduction of Tiredness, Energy & Immune Support - UK Made

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Why We Love It

Comprehensive one-year supply.
Enhanced with Vitamin C.
Supports overall wellbeing.

Main Highlights

FULL SPECTRUM 1 YEAR SUPPLY B Complex - Each micro small b vitamins tablet contains all 8 B Vitamins (B1,B2,B3,B5,B6,B12) as well as Biotin, Folate and Vitamin C to help absorption and immunity. Unique formula that contains full spectrum of B complex vitamins high strength in accurate dosages. Each bottle contains 365 Tablets which will last up to 12 months
ENRICHED WITH VITAMIN C – Our B vitamin complex includes a unique blend of 8 vitamins including: Vitamins B1 (Thiamine), B2 (Riboflavin), B3 (Nicotinamide), B5 (D-Calcium Pantothenate), B6 (Pyridoxine), B7 (Biotin), B9 (Folic acid), and Vitamin B12 (Cyanocobalamin) as well as added vitamin C (Ascorbic acid) to help with absorption and immune support.
SUPPORTS YOUR BODY - Our Vitamin B Complex with added Vitamin C supports the maintenance of normal hair, skin, bones, absorption of calcium, whilst contributing to the reduction of tiredness & fatigue, normal energy yielding metabolism, normal red blood cell production, and normal function of the immune system.
SAFETY & QUALITY - To uphold the highest standards of safety and quality, our products undergo post-production testing for heavy metals and other unwanted compounds, ensuring full compliance with international regulations. Once testing is complete, products are bottled and packaged in BRC Grade AA certified facilities, guaranteeing that our rigorous quality standards are reliably maintained and delivered to you.
Why Choose New Leaf Products? As a family-owned business with extensive experience in formulating and producing our unique range of over 100 vitamin and mineral supplements, we are dedicated to upholding the highest standards of safety and quality. We prioritise environmental sustainability and social responsibility, donating a portion of our sales to global causes. Join our community of over 2 million satisfied customers, where our customers are always our top priority.

Vitamin B Complex Supplement - 365 Tablets - 1 Year Supply - with All 8 B Vitamins & C - 1 Tablet-a-Day - Non-GMO, Gluten-Free & Vegan-Friendly - for Men & Women

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Why We Love It

Complete B-vitamin range.
Year-long supply.
Vegan-friendly formula.

Main Highlights

RIGHT BLEND OF VITAMINS: WeightWorld’s B Complex brings together all 8 B Vitamins in one easy-to-take tablet, including B1 (Thiamine Hydrochloride), B2 (Riboflavin), B3 (Nicotinamide), B5 ( D-Calcium Pantothenate), B6 (Pyridoxine Hydrochloride), B7 (D-Biotin), B9 (Folic Acid), and B12 (Methylcobalamin). The formula also includes Vitamin C (Ascorbic Acid), rounding out a well-considered daily blend.
1 YEAR SUPPLY - 365 TABLETS: B Vitamins are water-soluble and aren't retained for long after consumption, which is why they're often taken daily as part of a consistent routine. WeightWorld's Vitamin B Complex Tablets offer a great option for those looking to include an effective source of vitamins in their daily routine. Each bottle of Vitamin B Complex Supplement contains 365 tablets, providing a whole 1-year supply.
PART OF THE ROUTINE: Riboflavin (Vitamin B2) contributes to the maintenance of normal skin. Vitamin B6 contributes to the normal function of the immune system. Riboflavin (Vitamin B2) contributes to the maintenance of normal vision. Vitamin B12 contributes to normal energy-yielding metabolism. Vitamin C contributes to the reduction of tiredness and fatigue. Vitamin B6 contributes to normal red blood cell formation (EFSA)
NON-GMO & VEGAN-FRIENDLY: WeightWorld’s B Complex is designed for everyday convenience. Just take 1 tablet a day, no mixing needed. It is Non-GMO, free from gluten, lactose & magnesium-stearate, also suitable for both men and women. Made in GMP-approved facilities, this supplement is also vegan-friendly, aligning with a wide range of lifestyle and dietary preferences.
THE JOURNEY OF WEIGHTWORLD: Born from a passion for food supplements, WeightWorld has been growing since 2006. With nearly two decades of experience, the brand offers a wide range of products, including vitamins, minerals, plant-based supplements, devices, and more. Now reaching multiple countries, the focus remains on developing products that evolve with changing needs while staying true to the values that started it all.

Igennus Healthcare Nutrition

Igennus Super B-Complex - High Absorption Methylated B Vitamins, Clean Label, Sustained Release - Complete Spectrum of B Vitamins with Folate, Boosted B12 & Vitamin C, 60 Tablets

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Why We Love It

Enhanced absorption formula.
Boosts energy levels.
Sustained nutrient release.

Main Highlights

SUPERIOR METHYLATED & ACTIVE FORMS - all 8 essential B-vitamins are easily absorbed and instantly used by the body, including methylated folate (instead of standard folic acid tablets), and vitamin B12 as methylcobalamin, MTHFR-friendly
PURE & CLEAN - formulated by nutrition scientists; we only use hypoallergenic ingredients with no unnecessary additives (such as silicon dioxide, magnesium stearate or titanium dioxide), lab verified, vegan, GMP manufactured in the UK
SUPPORTS ENERGY - scientifically supported doses of vitamin B1 and B6 contribute to normal energy-yielding metabolism & vitamin C also contributes to the reduction of tiredness and fatigue
ALL-DAY NUTRIENT COVERAGE - as B-vitamins are easily excreted, we use a sustained-release tablet delivering potent doses, to gradually deliver B-vitamins into the bloodstream for all-day nutrient coverage
SMALL & EASY-TO-SWALLOW - to optimise nutrient levels, we recommend dividing the dose for adults by taking 1 tablet twice a day, or for children over 11 yrs, 1 daily

Supports energy and mental performance.
Assures premium quality ingredients.
Backed by expert research.

Main Highlights

WHAT IS HIGH STRENGTH VITAMIN B COMPLEX? It’s a group of 8 essential B vitamins, including biotin and folic acid, that work together to help our body systems to operate efficiently. B vitamins have a long list of functions, including maintaining heart health, supporting mental performance, as well as combating tiredness and helping us to convert food into energy. B vitamins also keep skin, hair and eyes in good condition.
WHY CHOOSE HEALTHSPAN? They have created a high strength formulation in one daily tablet that includes all 8 B vitamins plus the nutrients choline, inositol and PABA to support your energy levels, nervous system and psychological function. This supplement is ideal for those who want to support their brain, heart and energy levels. It is also suitable for vegetarians and vegans, who may not be getting enough of these important vitamins.
QUALITY INGREDIENTS FIRST: Healthspan work harder to seek out the best-quality ingredients for their supplements. They source and manufacture their range, ensuring optimal purity and quality along the way so whether it is faster-acting, better-absorbed, filtered for optimal purity or simply contains more active ingredients, they're confident you won't find better quality.
INNOVATIVE SOLUTIONS, BACKED BY EXPERTS: Healthspan has 25 years' experience working closely with trusted research partners and experts. They thoroughly test and perfect their products with in-house doctors and nutritionists to bring you the latest developments in nutritional supplements.
THE HEALTHSPAN WAY: Here's something you may not know – Not All Supplements Are Created Equal. There can be considerable differences in product quality, purity and sustainability. Healthspan strive to bring you the most innovative solutions for maximum benefit: that's just The Healthspan Way.

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We scanned 1643 products

We reviewed these offers relevant to the B Complex Vitamins High Strength within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Solgar, Nutravita, VitaBright, P!nkTribe, NEW LEAF PRODUCTS, WeightWorld, Igennus Healthcare Nutrition, healthspan, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best B Complex Vitamins High Strength in the market, we considered we took a deep dive into 8216 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Solgar Vitamin B-Complex "100" Extra High Potency Vegetable Capsules - Pack of 100 - Key Vitamin B Combination - For Increased Energy and Mental Performance - Vegan and Gluten Free. We love many things about this product by Solgar. What sets it apart from the competition is High potency B-complex dose, Boosts energy and mental performance, Sustainable, recyclable packaging.
The best value product for most shoppers and where user satisfaction is continuously the highest is Solgar Vitamin B-Complex "100" Extra High Potency Vegetable Capsules - Pack of 100 - Supports Mental Performance and Reduces Fatigue - Vegan by Solgar based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for B Complex Vitamins High Strength and the best cost-to-value ratio is Solgar Vitamin B-Complex "100" Extra High Potency Vegetable Capsules - Pack of 100 - Supports Mental Performance and Reduces Fatigue - Veganat Solgar with a 51% discount.
Our list of the best B Complex Vitamins High Strength is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best B Complex Vitamins High Strength in The UK

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We scanned 1643 products

We concluded that: