Moderate Sunlight Found to Prevent Dementia

Not too little, and not too much

Whether it's summer or winter, you should get outside in moderate amounts of sunlight to prevent dementia. Shutterstock/Ground Picture

You are probably exposed to sunlight on a daily basis and know of its health effects. But you may not know that too much or too little sunlight holds no health benefit.

For example, a recent study found that sunlight helps prevent dementia—but only when exposure is moderate. Why is that? And how much is “moderate”?

Exposure to Sunlight Prevents Dementia

Recently, Professor Jintai Yu’s team from Fudan University in China, together with Professor Lan Tan’s team from Qingdao University, conducted a study that included more than 360,000 people with up to nine years of follow-up.