20 years ago I had prostate cancer. I was in a group of men (over 30 men) taking 39 treatments to kill it. Every man, 100%, was low on vitamin D. We were given mega doses until we got our levels up as we took our Proton radiation. I take it today and have hardly been sick with anything since. I would have to think awhile, but I don’t remember even having a cold since then. I take 5k units in the AM and 5k in the evening. I know that’s too much, but after 20 years, why change? I would rather gamble on too much than not enough. I’m a believer.
Every man, 100%, was low on vitamin D.
The government forces milk sellers to add vitamin A to skim milk. Many people have excess vitamin A.
Having a lot of stored vitamin A reduces vitamin D. Giving vitamin D supplements did not prevent prostate or breast cancer many times people tried it.
Maybe excess vitamin A causes prostate and breast cancer.