[megaman8]

I agree with all this except the sunscreen part. I was under the impression that sunscreen can actually increase the chance of cancer. Furthermore, sunscreen does block vitamin-D. But, you don't need much (sunblock free) sun exposure to max out your vitamin-D absorption (just 12 minutes a day will do it).

On a side note, I do intermittent fasting and caloric restriction to hopefully reduce my rate of aging.

[moosey]

There is vast scientific evidence showing that using sunscreen reduces cancer risk. There was a study that showed it could cause increases, but when analyzed further (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1447210/) it showed that people who use sunscreen spend more time in the sun. While using sunscreen reduces your chances of getting cancer, there is nothing quite like avoiding the sun entirely for the vast majority of the day.

There are more recent studies like https://www.ncbi.nlm.nih.gov/pubmed/22086817, where if you go to the link, it actually points out the value in spending some time in the sun, getting some melanin and vitamin D development, which will fight a specific kind of skin cancer (CMM) that doesn't seem to be stopped by sunscreen, and might have a number of confounding factors.

The basics are that it's complicated, but that if you are spending time in the sun, you should be using sunscreen, but that you also need some sun, or something like that, who really knows.

https://www.nia.nih.gov/health/skin-care-and-aging

That article also suggests the use of sunscreen.

[mikkelam]

Not using suncreen will also cause cancer, namely skin cancer.