[xwowsersx]

Supplementing with vitamin D is honestly one of the easiest things you can do... it's cheap, available everywhere, and makes a real difference. Just make sure you're also taking magnesium citrate (or another good form of magnesium) with it, since your body needs magnesium to properly use vit D

[Etheryte]

An even better option is to go to your GP and have them run your bloodwork. It's cheap, depending on where you're from it might even be free, and you don't have to guess or randomly pick supplements you read about online. Most people on HN will live to a very high age, there's no reason to take random gambles on what you do to your body.

[xwowsersx]

For sure, you're essentially flying blind without bloodwork. I get a full panel at least 3x/year.

[johnisgood]

And K2.

As for magnesium, I would go with magnesium glycinate or magnesium threonate.

[xwowsersx]

Absolutely. And you're totally right about magnesium glycinate. That's what I take. I don't know why I said citrate.