Vitamin
B-Complex (Energy Focus)
Also known as: B-complex, Active B vitamins
Essential coenzymes for energy metabolism. Methylated forms for optimal function.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Energy metabolism
- Nerve function
- Mood
- Cellular energy
How it works
- Coenzymes for ATP production
- Nerve function
- Methylation support
Dosage
- Typical range
- 1-2x RDA or higher B's
- Timing
- Morning (may be energizing)
- With food
- Yes
- Duration
- Daily
- Special populations
- Fatigue, stress, poor diet, vegetarians
Forms
- Methylated/active forms
- Standard
Safety
Common side effects
- Yellow urine (B2)
- Flushing (B3)
Contraindications
- None at appropriate doses
Evidence notes
Essential for energy production
Grade A: Multiple well-designed human trials support the main claims.
Related in Vitamin
Check a full stack
Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.
Open the checkerWhere does B-Complex (Energy Focus) fit in your stack?
Answer two questions and get a stack graded on research — every ingredient scored on the evidence behind it, not the marketing.
Build my stack2 questions · free · no account needed to start
Also on iPhone — get the free app
Evidence-based supplement guides, no spam
We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.
Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.