B-Complex is a comprehensive b complex vitamins solution that supports steady energy production and neurological health, using bioactive forms for better absorption and daily resilience. This formula uses bioactive forms like methylcobalamin and 5-MTHF to boost absorption, helping you feel more energy and sharper thinking throughout the day. Thorne is trusted for quality and rigorous testing, so you know you’re getting a high standard supplement.

Available Sizes & Variants:

60 Veg Caps B-Complex - Daily energy and nerve health.

Benefits & Features:

• Supports daily energy and mood balance.
• Active ingredients include methylcobalamin and 5-MTHF, designed to support energy production and neurological health through improved absorption and utilisation in daily life, for sustained wellbeing every day.
• Biotin and folate support red blood cell formation for steady vitality.
• Designed for daily use with all eight b complex vitamins in bioactive forms.
• Thorne's strict quality testing ensures purity and potency you can rely on.

Thorne's B-Complex #12 brings a full spectrum of eight B vitamins in their active forms, including methylcobalamin and 5-MTHF, designed for better absorption. The brand's reputation for strict quality standards and third-party testing underpins every bottle. The formulation supports energy production and neurological function, with vegetarian capsules that fit plant-based lifestyles. Probiotics can complement a wellbeing routine, and a vitamin d supplement can be part of a balanced approach. This is reliable, premium nutrition you can feel good about.

Biotinn, Choline (Citrate), Folate (5-MTHF & Calcium Folinate), Vitamin B1 (Thiamin HCI), Vitamin B12 (Adenosylcobalamin), Vitamin B12 (Methylcobalamin), Vitamin B2 (Riboflavin 5'-Phosphate Sodium), Vitamin B2 (Riboflavin), Vitamin B3 (Niacinamide), Vitamin B5 (Pantothenic Acid), Vitamin B6 (Pyridoxal 5'-Phosphate), Vitamin B6 (Pyridoxine HCL), Calcium Laurate, Hypromellose Capsule, Microcrystalline Cellulose, Silicon Dioxide

• GTIN: 693749112037
• Manufacturer: Thorne
• Categories: Best SellersNew ArrivalsPopular Supplement BrandsSubscribe & Save ProductsThorne Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one capsule up to three times daily, or as advised by your healthcare provider. Shake Well Before Using
Add 0.68 ml (30 drops) to 2 oz. of water or juice\, 2 or 3 times per day. Best taken between meals.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Vitamin B12 (Methylcobalamin and Adenosylcobalamin)

Vitamin B12, also called cobalamin, comes in bioactive forms such as methylcobalamin and adenosylcobalamin, which help normal bodily functions. These forms are picked to boost bioavailability and utilisation within the body. The bioactive forms are more efficiently absorbed than other forms, adding to the body’s metabolic processes.

What Does Vitamin B12 Do?

Vitamin B12 takes part in energy production and neurological function, and supports red blood cell formation and DNA synthesis as part of normal metabolism. EFSA notes the key roles of B vitamins in these processes, while NHS guidance emphasises keeping adequate intake for overall health.

*This product is not intended to diagnose, treat, cure, or prevent any disease.

Thorne is the brand we chose over other supplement manufacturers for this B-Complex product because this brand consistently demonstrates a track record of high-quality, research-backed formulations that healthcare professionals trust. Compared with many alternatives, Thorne is renowned for its professional-grade formulations and rigorous testing culture, which aligns with our commitment to reliability and safety. This brand has earned a strong industry standing for purity and potency, and is widely recommended by clinicians, reflecting its credibility and heritage in the sector.

This product fits Thorne’s strengths perfectly. By delivering all eight B vitamins in bioactive forms, including methylcobalamin and 5-MTHF, Thorne highlights its focus on bioavailability and practical value for daily use. The brand’s established quality standards and third-party testing underpin our confidence in its consistency and safety. Our medical team assesses brands like Thorne through our our medical team and evaluates it via our quality certification process to ensure alignment with Welzo’s criteria.

Ultimately, Thorne stood out in our evaluation for its heritage, trusted reputation, and product design that directly supports the intended B-complex functionality, making it our endorsed partner for this supplement.