I'm taking natures bounty omega 3 plus d and i just recently started taking natures bounty hair skin and nails for hair growth 1250 mcg is it safe is that dosage too high?

Who knows? No one: With regards to dietary supplements, there's no 3rd party oversight regarding manufacture or quality, much less safety & effectiveness. We don't typically check blood levels of most vitamins aside from B12, D & folic acid but that would be best way to guide your decision regarding how much of each. However, there are no studies demonstrating any benefit from multivitamins. Besides 1,250mcg of what