From the first link, sounds like what the other reply said - vitamin D is important (but can be gotten from other sources), and I failed to mention it. Sorry. That said, it also recommends wearing a hat, and using sunscreen when outside for longer periods of time.
I unfortunately can’t read the second link without agreeing for them to sell my data, so that’s a nope.
I feel like Italy might have that one covered, what with all the tortellini, ravioli, and such