Across 16 first-hand reports, people mentioned a side effect 5 times (about 31 per 100 reports). The most common: fatigue, brain fog, anxiety. User reports show what people notice — they can't tell you whether B-Complex Vitamin is safe for you.
“February I started a b complex with 25mg hcl...felt good. April 8th took an additional b complex...felt a bit off.”
“I feel a different anxiety after taking a B-complex vitamin. Like I feel energy surging throughout my body, and not in a good way.”
“I take a B-complex vitamin but I'm not convinced it does anything for me.”
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.
Conclusion: In this review, there was low- to very low-quality evidence to show that taking an antioxidant may benefit subfertile women. Overall, there is no evidence of increased risk of miscarriage, multiple births, gastrointestinal effects or ectopic pregnancies, but evidence was of very low quality. At this time, there is limited evidence in support of supplemental oral antioxidants for subfertile women.