Hacker News Reader

I wouldn’t worry too much about sunscreen. Don’t have the link, but I remember reading a study that sunscreen had pretty much a zero 0% effect on Vitamin D levels, because most people wear way less sunscreen than they should, and the left over areas that people miss still produce enough.

View on HN

btw sunscreen has a pretty negative effect on environment though, and is easily avoidable anyway with a cap/clothes

I can assure you that people with very light skin do not agree. Sunscreen is a necessity for some people.

The mineral based sunscreen is a big step in fixing this. Look for those that are environmentally friendly.

From a doctor I've heard you only need to go in the sun for about 10 minutes a day and you'll get all the vitamin D you need, but food also gives you it.

That's a misconception. It depends on where you live, but most people who work inside can expect to be deficient.

For instance, in a study on skateboarders in Hawaii who spent around 4 hours in the sun each day, 50% of participants were found deficient.

https://pubmed.ncbi.nlm.nih.gov/17426097/

Reply on news.ycombinator.com