NP. Yeah, I was recently tested and found very deficient and even my doctor didn't prescribe anything close to that level. I'm at ~14k/day (50k twice a week) for 12 weeks. Talking with my colleagues, it seems most are on a prescribed Vitamin D supplement (or an encouraged supplement), but no one else was even close to my level. One has a 10,000 IU daily dose for 8 weeks, the rest have 1k-2k (like your friends) indefinite daily dose or just for the winter to carry them through.