32Evidence B

Getting some sun during the day — don’t stay out of the light all the time

Women who deliberately avoid sunlight can expect to live 0.6 to 2.1 years less than those who get the most sun exposure. Even non-smokers who avoid the sun tend to have a life expectancy similar to smokers who get plenty of sun.

Cost

No cost at all. Just a few minutes each day — on your comm…

Benefit

A Swedish study followed 29,500 women for 20 years. Compared to the group getting the most sun, those who avoi…

Cost

No cost at all. Just a few minutes each day — on your commute or during lunch breaks is enough.

Benefit

A Swedish study followed 29,500 women for 20 years. Compared to the group getting the most sun, those who avoided it ended up living 0.6 to 2.1 years less. The authors noted that “non-smoking women who avoid sunlight have a life expectancy comparable to smokers who get the most sun exposure.”

Original sources

Lindqvist PG, Epstein E, Nielsen K, et al. (2016). Avoidance of sun exposure as a risk factor for major causes of death: a competing risk analysis of the Melanoma in Southern Sweden cohort. Journal of Internal Medicine, 280(4), 375-387. https://doi.org/10.1111/joim.12496

Open source link
Book note

There are some caveats: Sweden’s high latitude and limited sunlight mean these findings may not directly apply to China. It’s also possible that people avoiding sun tend to be less physically active or prefer staying indoors. Also, avoid sunburn — use protection under strong midday sun, since excessive exposure raises skin cancer risk.

My note