Their advice hasn't been updated for a long time, and is for 400 IU. During Covid, plenty of medics in the media were recommending about 2000 IU, perhaps a bit more.

Studies are emerging, so time will tell I guess.

This was the dose that my doctor recommends as well. I didn't start taking them until doc said "your vit d levels are pretty low". They wanted to give me some of those megadoses but I just agreed to start supplementing. I took 5000IU daily for about a month and then switched over to 2000 and everything has been normal since.

Vitamin d accumulates. You can actually take it all at once, but most people take dailies. Fat soluable vitamin...unlike water soluable that leave the body almost immediately.

I saw a paper somewhere implying the more body fat you have the more Vitamin D you need too.

Does the NHS say all other vitamin supplements are a waste; or is vit-d the only one they actively endorse?

Can you share link if you have it? I would love to something from an authority like NHS about what vitamins are worthwhile.

The vitamin D page is: https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-...

There are links to other vitamins from there, but those pages all say you should be able to get all you need from a balanced diet.

>> Does the NHS say all other vitamin supplements are a waste; or is vit-d the only one they actively endorse?

I need to look for docs around this, but the message in the US (not sure about UK) is usually not that stark. Doctors usually say - "if you are eating a balanced diet, you dont need any supplements except Vitamin D".

Is b12 only recommended for those who eat little meat? They don’t recommend that? It seems like a large segment