It's badly written by someone who obviously doesn't have English as his first language.
Vitamin D3 — 1000–3000 IU/day. Note RDA (Recommended Daily Allowance) is 800–1000 IU/day. The safe upper-dose daily limit is likely < 4000 IU/day.
Nonsense. I've been taking 10,000 IU daily for two years. The safe upper limit is likely to be at least 50,000 IU and you could probably take double that for short periods (months).
https://www.aestheticsadvisor.com/2021/02/quercetin-zinc-study.html
It's badly written by someone who obviously doesn't have English as his first language.
Nonsense. I've been taking 10,000 IU daily for two years. The safe upper limit is likely to be at least 50,000 IU and you could probably take double that for short periods (months).