PlainPill

B-Complex Vitamin vs B-Complex Vitamins for energy

Short answer: For energy, more users report improvement with B-Complex Vitamins — 100% of 5 reports, versus 60% of 5 for B-Complex Vitamin.

B-Complex Vitamin has 7 meta-analyses and 10 randomized trials on PubMed; B-Complex Vitamins has 5 and 5.

Based on 16 reports about B-Complex Vitamin and 24 about B-Complex Vitamins. Not medical advice.

B-Complex Vitamin
Supplement
B-Complex Vitamins
Supplement
Users say it helped51%helped6 reports · few reports45%helped9 reports · few reports
Verdict
Mixed
Mixed
ResearchAResearch: StrongBResearch: Moderate
Meta-analyses / RCTs7 / 105 / 5
Mainly used for
Energy
% reporting improvement
60% (5)100% (5)
Common side effectsfatigue, brain fog, anxiety, restlessnessNone reported
Typical dose reported25 mg / daily then additional dose—
B-Complex Vitamin
Latest review conclusion

In this review, there was very low-quality evidence to show that taking an antioxidant may provide benefit for subfertile women, but insufficient evidence to draw any conclusions about adverse events. At this time, there is limited evidence in support of supplemental oral antioxidants for subfertile women.

Cochrane Database Syst Rev, 2017 ↗
What a user said
“After starting it for about a week along with diet change...My Chronic fatigue is gone, Tachycardia is gone, brain fog is gone, anxiety is much better, depression is better”
Full B-Complex Vitamin profile →
B-Complex Vitamins
Latest review conclusion

The findings of this systematic review suggest that supplementation of B Complex vitamins, especially folic acid, may have a positive effect on delaying and preventing the risk of cognitive decline. Ascorbic acid and a high dose of vitamin E, when given separately, also showed positive effects on cognitive performance, but there is not sufficient evidence to support their use. The results of vitamin D supplementation trials are not conclusive in assessing the potential benefits that vitamin D might have on cognition.

Nutrients, 2022 ↗
What a user said
“500% of my daily intake of B-complexes...helped my memory and function like crazy”
Full B-Complex Vitamins profile →

Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate