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Energy metabolism; Cellular health; Nutrient replenishment
Adults with busy schedules seeking daily nutritional support for energy metabolism and those with limited intake of B-rich foods.
Adults take 1 capsule daily with food; taking with a meal may improve tolerance of B vitamins and reduce niacin flush.
Non-GMO; Gluten-Free; Soya Free; Vegan
Methylcobalamin acts as a cofactor for enzymes involved in methylation and energy metabolism, which may support red blood cell formation and nervous system function.
Caution: High doses may mask functional issues related to other B vitamins; those sensitive to B12 may experience restlessness or skin flushing.
Vitamin B6 serves as a coenzyme in amino acid metabolism and neurotransmitter synthesis, which may support energy production and nervous system health.
Caution: Very high intakes over time may cause tingling or numbness; take as directed and avoid combining multiple high-dose B6 products.
Riboflavin helps form FAD and FMN coenzymes that participate in mitochondrial energy production and antioxidant recycling.
Caution: High doses can cause bright yellow urine, which is harmless; take with food if stomach upset occurs.
Niacin contributes to the formation of NAD and NADP, which are central to cellular energy metabolism and redox reactions.
Caution: Niacin may cause temporary flushing and warmth; taking with food may reduce discomfort.
5-Methyltetrahydrofolate is the active folate form used in one-carbon metabolism to support methylation and DNA synthesis.
Caution: Those with a history of high folate intake should avoid exceeding directions, especially if also using fortified foods.
B1, B2, B3, B5, and B6 act as coenzymes that feed mitochondrial pathways for converting carbohydrates, fats, and proteins into energy. Methylfolate and methylcobalamin contribute to methylation processes that support cellular functions and complement energy metabolism. Vitamin C participates in antioxidant recycling, which helps protect cellular components during metabolic activity.
Label Warning: Do not exceed the recommended dose. Consult a physician if you are hypersensitive to thiamine, niacin, or vitamin B12. Stop use and speak to a physician if any adverse reaction occurs.
Who should be cautious: People with known sensitivities to B vitamins such as thiamine, niacin, or vitamin B12. Those with a history of flushing with niacin may wish to start cautiously. Individuals with vitamin B12-related concerns or receiving B12 injections should discuss combined intake with a healthcare professional.
Storage: Store in a cool, dry place. Keep out of reach of children.
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Magnesium and B vitamins may support energy production and reduce fatigue, promoting overall vitality and well-being.
AI generated. Not medical advice.
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At Doctor's Best, we value the science of energy. Our Fully Active B Complex is a comprehensive blend of B vitamins that are readily available and highly bioavailable in the body. This unique formula offers optimal support for energy production, cellular health, and overall wellbeing.
Adult use:Take 1 capsule daily with food, or as recommended by a nutritionally-informed physician.
Hypromellose (vegetarian capsule), microcrystalline cellulose, magnesium stearate (plant-based source), Silicon dioxide.
Do not exceed the recommended dose. Consult a physician if hypersensitive to thiamine, niacin, and vitamin B12. Discontinue use and consult a physician if adverse reaction occurs.
Keep out of reach of children.
Store in a cool dry place.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| Supplement information | ||
| Serving size:1 Veggie Capsule | ||
| Servings Per Container: 60 | ||
| Amount per serving | %Reference intake | |
| Vitamin C (as ascorbic acid) | 40 mg | 44% |
| Thiamine (as Thiamine HCl) | 60 mg | 5000% |
| Riboflavin (as riboflavin and riboflavin 5'-phospate) | 75 mg | 5,769% |
| Niacin (as niacinamide and niacin) | 50 mg | 313% |
| Vitamin B6 (as pyridoxine HCl and pyridoxal-5-phosphate) | 50 mg | 2941% |
| Folate (as (6S)-5-methyltetrahydrofolic acid, glucosamine salt) (Quatrefolic®) | 400 mcg DFE | 100% |
| Vitamin B12 (as methylcobalamin) | 1,000 mcg | 41667% |
| Biotin | 600 mcg | 2000% |
| Pantothenic Acid (from d-calcium pantothenate) | 100 mg | 2000% |
