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Energy metabolism; Cellular health; Nutrient repletion
People with busy routines seeking convenient B vitamin intake and adults who want active-form Bs for daily energy metabolism support.
Adults take 1 capsule daily with food; taking with a meal may enhance tolerance for niacin-related flushing.
Non-GMO; Gluten Free; Soy Free; Vegan
Riboflavin-5-phosphate forms FAD and FMN coenzymes that help enzymes in energy production and antioxidant recycling.
Caution: High-dose B2 may cause bright yellow urine, which is harmless but can be surprising.
Pyridoxal-5-phosphate acts as a coenzyme in amino acid metabolism and neurotransmitter synthesis.
Caution: Large amounts of B6 over time may cause tingling or numbness in some people; follow the suggested use.
Methylcobalamin is used in methylation and red blood cell formation, which are involved in cellular energy processes.
Caution: Very high B12 can cause acne-like breakouts in some individuals; monitor your response.
Vitamin B3 forms NAD+/NADP+ coenzymes that drive cellular energy metabolism.
Caution: Niacin may cause temporary flushing and warmth; taking with food can reduce discomfort.
5-Methyltetrahydrofolate is the bioactive folate form used in methylation and nucleotide synthesis.
Caution: Folate can mask signs of low vitamin B12; this formula includes B12, but those with known B12 issues should be mindful.
Active forms of B2, B6, folate, and B12 participate in methylation and coenzyme pathways that underpin energy metabolism. B3 supports NAD+/NADP+-dependent reactions, while B2 helps regenerate antioxidants, creating broad coverage for cellular processes.
Label Warning: Do not exceed the recommended dose. Consult a physician if you are hypersensitive to thiamin, niacin, or vitamin B12. Stop use and consult a physician if an adverse reaction occurs.
Who should be cautious: People with known sensitivities to B vitamins such as thiamin, niacin, or vitamin B12 may need extra caution. Those with a history of flushing from niacin may wish to start slowly and take with food.
Storage: Store in a cool, dry place.
Many users report improved energy and overall daily vitality after taking this B complex.
Capsules are described as simple to take and comfortable, with no lingering taste.
A few users noticed a temporary warm or flushing sensation at the start.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
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 well-being.
Adult use: Take 1 capsule daily with food, or as recommended by a nutritionally-informed physician.
Hypromellose (vegetarian capsule), microcrystalline cellulose, magnesium stearate (vegetable source), silicon dioxide.
Do not exceed recommended dose. Consult a physician if hypersensitive to thiamin, 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 ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| Serving Size: 1 Veggie Capsule | ||
| Serving Per Container: 60 | ||
| Amount Per Serving | %Daily Value | |
| Vitamin C (as ascorbic acid) | 40 mg | 44% |
| Thiamin (as thiamin HCl) | 60 mg | 5000% |
| Riboflavin (as riboflavin and riboflavin-5-phosphate) | 75 mg | 5769% |
| 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) | 1000 mcg | 41667% |
| Biotin | 600 mcg | 2000% |
| Pantothenic acid (from d-calcium pantothenate) | 100 mg | 2000% |
