Amounts of vitamins per supplement seem to vary wildly. Just from checking supplements I have at home: Supplement #1 (all B vitamins): - B6: 4.2mg - B9: 600

Amounts of vitamins per supplement seem to vary wildly. Just from checking supplements I have at home: Supplement #1 (all B vitamins): - B6: 4.2mg - B9: 600ug - B12: 7.5ug Supplement #2 (just B6 + B9 + B12): - B6: 75mg - B9: 800ug - B12: 150ug ------------ Recommended daily doses are: - B6: 1.7 mg/day (men) - B9: 400 ug/day in US, 330 ug/day in EU (men + non-pregnant-non-lactating women) - B12: 2.4 μg/day in US, 4.0 μg/day in EU (men + non-pregnant-non-lactating women) Tolerable upper intake levels are: - B6: 100 mg/day in US, 25 mg/day in EU - B9: 1000 ug/day - B12: no sufficient evidence for setting upper level ------------ From the study: Beneficial effects (for men): - B6: 1.41 - 3mg/day, multivitamins - B9: 200 - 400 mg/day - B12: 0.1 - 55 ug/day Harmful effects (for men): - B6: > 20mg/day - B9: 400 - 600 mg/day - B12: > 55ug/day ------------ Also something to keep in mind: apparently the majority of people in this study who got lung cancer were heavy smokers for many years, even if they stopped smoking. Lung cancer by years of smoking: - 0 years: 60 cases - 1-35 years: 169 cases - > 35 years: 568 cases Lung cancer by pack-years of smoking: - 0 pack-years: 60 cases - 1-25 pack-years: 178 cases - > 25 pack-years: 555 cases