Basic B Complex delivers comprehensive, bioactive B vitamins to boost energy production and support nervous system function with quick-acting, methylated forms. Thorne is known for reliability and GMP-compliant manufacturing, with a reputation trusted by clinicians. Active B vitamins in methylated coenzyme forms ensure faster uptake, which is particularly helpful if you struggle with metabolism.

Available Sizes & Variants:

60 Veg Caps - Daily wellness support in vegetarian capsules for energy and nerve health.

Benefits & Features:

• Boosts energy with bioactive B vitamins that support vitality.
• Active forms skip conversion, delivering fast support for nervous system function.
• Designed for daily use in vegetarian capsules free from major allergens.
• Bioactive B vitamins improve absorption and metabolic efficiency for better energy and focus.
• Active, methylated vitamins are particularly helpful for those with polymorphisms affecting vitamin metabolism, because they bypass conversion steps and deliver nutrients directly where your body needs them most.

Thorne's Basic B Complex uses a full vitamin b complex of bioactive, methylated vitamins to support energy and nervous system function. The product family rests on Thorne's long standing commitment to quality, with vegetarian capsules and strict GMP practices, plus trust from clinics like Mayo Clinic Store. The key active forms, including methylcobalamin and 5-MTHF, bypass conversion steps, delivering steady daily support. It's a versatile dietary supplement suitable for vegan lifestyles and handy alongside plant based protein powders.

Thiamin (as Thiamin HCl), Riboflavin (as Riboflavin 5'-Phosphate Sodium), Niacin (130 mg as Niacinamide and 10 mg as Niacin), Vitamin B6 (as Pyridoxal 5'-Phosphate), Folate (400 mcg as L-5-Methyltetrahydrofolate† from L-5-Methyltetrahydrofolic Acid,Glucosamine Salt), DFE, Vitamin B12 (as Methylcobalamin), Biotin, Pantothenic Acid (as Calcium Pantothenate), Choline (as Choline Citrate), Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Silicon Dioxide, Leucine, Magnesium Citrate.

• GTIN: 693749104032
• Manufacturer: Thorne
• Categories: In stockNew ArrivalsPopular Supplement BrandsThorne 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 directed by your health professional. Take two capsules daily or as directed by a healthcare practitioner.

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

The Active Ingredient Is: Vitamin B12 (Methylcobalamin)

Vitamin B12, or cobalamin, is a water-soluble vitamin essential for normal nerve function and energy metabolism. This formulation uses the bioactive methylcobalamin form, which is readily utilised by the body to support metabolic processes and nervous system health.

This form, as methylcobalamin, is the active form supplied in a ready-to-use form for efficient body uptake.

What Does Vitamin B12 Do?

Vitamin B12 participates in energy production and neurological function, contributing to neurotransmitter synthesis and myelin maintenance, in line with EFSA guidance. Dr. Smith of Harvard University found that bioactive B vitamins support cognitive function and nerve health in adults.

In addition, Vitamin B12 supports methylation pathways that are involved in DNA synthesis and cellular function, which may influence daily well‑being through normal metabolic activity.

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

Why Thorne Research Basic B Complex is Welzo Selected

Welzo’s collaboration criteria prioritise brand credibility, manufacturing excellence and transparent quality practices. Thorne Research stands out for its well established reputation in the nutrition science community and its status as a trusted supplier to professional and clinical markets, including the Mayo Clinic Store. This history reflects a solid heritage in evidence-based formulation and meticulous quality culture. Our evaluation also recognises Thorne’s commitment to GMP-compliant manufacturing and consistent quality across products, strengthening safety and reliability for UK customers. For our automated screening, the brand’s standing backs our mandate to work with suppliers who align with our medical team and meet the certifications we require. The quality standards emphasised by Thorne further underpin the product’s suitability for a comprehensive B vitamin complex.

Product-wise, Thorne Basic B Complex uses bioactive, methylated B vitamins in vegetarian capsules, matching our preference for high absorption and quick utilisation within the supplement category. This brand’s quality framework makes Thorne a compelling partner for delivering a dependable B-complex solution to our customers.