Natural Factors, BioCoenzymated Active B Complex, 60 Capsules

Natural Factors BioCoenzymated Active B Complex is a Canadian vegetarian B-vitamin supplement in which every B vitamin is provided in its biologically active coenzyme form -- the specific molecular configuration that the body uses directly in cellular reactions, without requiring metabolic conversion. Key active forms include methylcobalamin (B12), pyridoxal 5-phosphate or PLP (B6), riboflavin 5-phosphate (B2), 5-methyltetrahydrofolate or 5-MTHF (folate), and benfotiamine (fat-soluble B1). It supports cellular energy metabolism, nervous system function, red blood cell production, mood regulation, and methylation -- the set of biochemical reactions central to DNA synthesis, detoxification, and neurotransmitter production.

Per capsule: Vitamin B1 25 mg total (thiamine HCl 15 mg + benfotiamine 10 mg), Vitamin B2 10 mg (riboflavin 5-phosphate sodium -- the active phosphorylated form), Niacin 100 mg (as inositol hexanicotinate -- a no-flush form that does not cause the skin flushing of standard niacin), Pantothenic acid 100 mg (calcium d-pantothenate), Vitamin B6 25 mg (pyridoxal 5-phosphate -- the active coenzyme form, bypassing the liver conversion required by pyridoxine HCl), Vitamin B12 500 mcg (methylcobalamin -- the neurologically active methyl donor form, not cyanocobalamin which requires demethylation), Folate 400 mcg (as 5-MTHF, Quatrefolic brand -- the end-product of the folate metabolic pathway, directly usable by individuals with the MTHFR gene variant that impairs standard folic acid conversion), Biotin 250 mcg, Choline 50 mg (citrate), Inositol 50 mg. The significance: standard B-complex products use less expensive precursor forms (pyridoxine HCl, cyanocobalamin, folic acid) that require enzymatic conversion in the liver before becoming active. Individuals with genetic variants (particularly MTHFR), liver dysfunction, or high physiological demand may convert these precursors inefficiently, making active forms therapeutically superior.

BioCoenzymated Active B Complex is particularly valuable for: individuals with the MTHFR gene variant (estimated 40-60% of the population carries at least one copy), which impairs conversion of folic acid to its active 5-MTHF form -- these individuals benefit specifically from pre-converted methylfolate; people with elevated homocysteine (requiring active B6, B12, and folate for the methylation cycle that clears homocysteine); those with chronic fatigue or neurological symptoms who want to ensure complete B-vitamin bioavailability; vegetarians and vegans at risk of B12 deficiency (methylcobalamin is the preferred form for neurological protection); and individuals with liver conditions that impair B-vitamin conversion. Standard dose: 1 capsule daily. Take with food to minimize any digestive sensitivity. High-dose B6 (over 100 mg/day long-term) can cause peripheral neuropathy; at 25 mg/day in active PLP form, this product is well within the safe range. Consult a physician if pregnant or taking medications that interact with B vitamins (methotrexate, certain antibiotics, levodopa).

The defining difference is the exclusive use of active coenzyme B-vitamin forms versus the precursor forms found in most B-complex products. Three distinctions are most clinically significant. First, folate as Quatrefolic 5-MTHF: Quatrefolic is a branded, patented form of 5-methyltetrahydrofolate (5-MTHF) with documented stability and bioavailability data. Unlike folic acid (the oxidized synthetic form in most supplements), 5-MTHF does not require the MTHFR enzyme for activation -- meaning individuals with common MTHFR polymorphisms can use it directly. Second, B12 as methylcobalamin: the methyl group attached to cobalamin makes this form directly active in the methylation cycle and neurological tissue. Cyanocobalamin (used in most supplements) must be demethylated and remethylated in the liver -- a step with individual variation in efficiency. Third, B6 as pyridoxal 5-phosphate (PLP): PLP is the active cofactor for over 100 enzymatic reactions; pyridoxine HCl requires hepatic phosphorylation and oxidation before becoming PLP. Benfotiamine (fat-soluble B1) adds superior nervous system penetration compared to water-soluble thiamine forms. Beyond ingredients: Natural Factors operates 1,000+ acres of certified organic farmland, holds TGA certification (Australian pharmaceutical-grade manufacturing standard), ISURA third-party testing for 800+ contaminants, and B Corp certification -- a comprehensive quality and ethics infrastructure.

Natural Factors is a Canadian-owned supplement manufacturer founded in 1948 and headquartered in Coquitlam, British Columbia. One of North America's largest supplement makers, it operates over 1,000 acres of certified organic farmland in BC's Okanagan Valley and manufactures in-house at Health Canada-licensed, FDA-inspected facilities. Every product is third-party tested through ISURA for over 800 contaminants including pesticides and heavy metals. Natural Factors is also B Corp certified, meeting rigorous environmental and social standards.

Natural Factors is one of Canada's largest supplement manufacturers, founded in 1955 by Jack and Rona Katz in British Columbia and still 100% Canadian family-owned. The company controls every production stage from raw material sourcing to finished product. Its facility holds TGA certification from Australia's Therapeutic Goods Administration, one of the world's strictest supplement manufacturing standards. All products are ISURA certified — independently tested for 800+ contaminants including pesticides and heavy metals — and Natural Factors conducts four rounds of product testing, double the industry average of two.

Natural Factors' most distinctive quality is vertical integration: the company grows its own raw herbs on 1,000+ acres of certified organic farmland in BC's Okanagan Valley, then processes and manufactures in-house. Most supplement brands source raw materials from external suppliers with no direct agricultural control. Natural Factors also uses ISURA third-party testing, a Canadian standard that screens for over 800 contaminants, well beyond typical heavy-metal panels. B Corp certification further reflects a documented commitment to environmental and social accountability, not just a marketing claim.

Natural Factors holds TGA certification from Australia's Therapeutic Goods Administration — one of the world's most rigorous pharmaceutical manufacturing standards, rarely earned by Canadian brands and far exceeding most North American certification requirements. Its ISURA testing program screens every product for 800+ contaminants, and it conducts four rounds of quality testing per product versus the industry standard of two. The company also operates its own farm in the Okanagan Valley for select botanical ingredients — a level of vertical integration uncommon among supplement manufacturers — and has been family-owned for over 70 years.