B-Complex #12

What Is B-Complex #12?

B-Complex #12 by Thorne delivers a complete spectrum of B vitamins in their active, coenzymated forms — including methylcobalamin (active B12), 5-methyltetrahydrofolate (5-MTHF, active folate), and pyridoxal-5-phosphate (P-5-P, active B6). Unlike standard B complexes that use cheap synthetic forms like cyanocobalamin, folic acid, and pyridoxine HCl that require enzymatic conversion, Thorne’s active forms are immediately usable by the body. The #12 designation refers to the inclusion of methylcobalamin as the primary B12 form, making this formula particularly valuable for patients with MTHFR variants or compromised B vitamin metabolism. 60 capsules per bottle.

Key Benefits

• Supports healthy, sustained energy production through B vitamin-dependent ATP and metabolic pathways
• Promotes healthy nerve function, myelin synthesis, and neurological integrity throughout the nervous system
• Supports healthy mood and neurotransmitter balance through B6, folate, and B12 methylation support
• Helps maintain healthy homocysteine metabolism and cardiovascular health with active folate and B12
• Supports healthy stress response and adrenal function — B vitamins are rapidly depleted by chronic stress
• Active forms bypass MTHFR conversion limitations, ensuring full benefit for those with genetic variants

Who Should Take This?

B-Complex #12 is an excellent choice for adults dealing with fatigue, brain fog, or low energy that may have a nutritional component, patients with known MTHFR gene variants who need methylated B vitamins, individuals under chronic stress that depletes B vitamin reserves, vegetarians and vegans at higher risk for B12 insufficiency, patients dealing with mood imbalances or neurological symptoms, and older adults whose B12 absorption naturally declines with age. Our doctors consider this a high-priority addition for many patients, particularly those on proton pump inhibitors or metformin which are known to deplete B12.

How to Use

• Serving size: Take 1 capsule twice daily with meals, or as directed
• Timing: Best taken with breakfast and lunch to leverage B vitamins’ energy-supporting effects during waking hours; avoid taking in the evening as it may interfere with sleep in sensitive individuals
• Duration: Suitable for ongoing daily use; B vitamins are water-soluble and not stored extensively, making consistent daily supplementation important
• Stacking: Pairs naturally with 5-MTHF 1mg for patients needing additional folate support, Magnesium Bisglycinate as a cofactor for B vitamin-dependent enzymes, and Basic Nutrients 2/Day for patients who want a complete nutritional foundation

Our Doctors’ Take

Our doctors consider B-Complex #12 one of the most impactful energy and neurological support supplements available, especially at its accessible price point. The difference between cyanocobalamin and methylcobalamin matters clinically — we see patients who have been supplementing with standard B complexes for years show meaningful improvements in energy and neurological symptoms when they switch to active forms. For chiropractic patients with nerve-related symptoms, tingling, or neurological complaints, B12 in the methylated form is among our first nutritional recommendations.*

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.