What is benefit of sunlight without UV and IR rays on human body?

Vitamin D synthesis: Exposure to sunlight without UV and IR rays still allows for the synthesis of vitamin D in the skin. Vitamin D is essential for strong bones, teeth, and muscles, as well as for the absorption of calcium from food.

Improved sleep: Sunlight helps regulate the body's natural sleep-wake cycle, known as the circadian rhythm. Getting enough sunlight during the day can help improve sleep quality and reduce the risk of sleep disorders.

Enhanced mood: Sunlight has been shown to boost mood and increase feelings of happiness and well-being. This is thought to be due to the release of serotonin, a neurotransmitter associated with improved mood and reduced depression.

Reduced risk of obesity: Exposure to sunlight may help regulate appetite and body weight. Some studies have suggested that people who get enough sunlight are less likely to be obese.

Improved immune function: Sunlight has been shown to have a positive effect on the immune system, helping to protect against infections and diseases.

Lowered risk of certain cancers: Some studies have linked regular exposure to sunlight (without UV rays) to a reduced risk of certain types of cancer, including prostate cancer, breast cancer, and colon cancer. However, it's important to note that excessive exposure to UV rays can increase the risk of skin cancer, so it's important to find a balance and use sun protection when necessary.