[outworlder]

I keep seeing this on different threads.

Be careful with supplements containing fat-soluble compounds , of which Vitamin D is one. Vitamin D is a hormone. Careful!

Same goes for any metals.

Taking supplements occasionally shouldn't be harmful. A vitamin D supplement every once in a while should be ok, specially if you are locked up and not getting sufficient sunlight.

The key being "occasionally". However, if you routinely take them, please have a checkup done on the next opportunity you get. If you don't have any deficiencies, you shouldn't need supplementation.

Vitamin C should be fine. It is water-soluble, excess can be disposed of, if your kidneys are normal.

[akira2501]

Also, get your blood work done regularly and do your annual checkups with your Doctor. There's no reason to guess that you might be vitamin deficient, you can just go check.

[mixmastamyk]

It sounds like to two of you (and downvoters) didn't read my post closely enough and/or not up on recent research:

https://pubmed.ncbi.nlm.nih.gov/32252338/

https://www.webmd.com/lung/news/20200518/more-vitamin-d-lowe...

Most folks are deficient, and it is difficult, though not impossible to overdo it. Also, if you are living at 35+ degrees latitude, dark skinned, or ~50+ years old, you are deficient.

Your warnings to be careful are careful in the wrong direction, ie. dangerous.

Just found this on the front page!:

https://www.sciencedirect.com/science/article/pii/S096007602...

https://news.ycombinator.com/item?id=24366006