
Just go outside (if you’re in a zone that has enough annual sun). At least in the summer months.
That’s the best source, as it helps your body produce the specific form it needs (because there are a few).
Supplementation only works when there’s a massive deficit, as it’s not necessarily the exact form a given person needs.



Businesses repair laptops every day.
I’ve replaced 2 keyboards in my family in the last year, and 2 batteries.
I’ve replaced fans in laptops. Recently replaced the cpu paste in one.
Just because you never see it because everyone you know buys shitty consumer laptops, doesn’t mean it doesn’t happen. Business-class laptops are maintainable, and they cost more because of it.
In the last year my friends in the SMB space have replaced half a dozen keyboards, numerous batteries, etc. And these are in companies that have regular replacement cycles.
So fixing computers has saved me from replacing a laptop for just $100 in parts in the last year alone. And time - I’m not waiting for some “expert” to tell me my keyboard is dead. I just ordered one online for $30.