参考文献:1. Bosman et al. Skin Exposure to Narrow Band Ultraviolet (UVB) Light Modulates the Human Intestinal Microbiome. Front. Microbiol. 2019, (10) :2410 2. Moan et al. Addressing the health benefits and risks, involving vitamin D or skin cancer, of increased sun exposure.PNAS. 2008, 105 (2):668-6733. Holick et al. Vitamin D and Sunlight: Strategies for Cancer Prevention and Other Health Benefits. CJASN. 2008, 3 (5) 1548-1554;4. Mead et al. Benefits of Sunlight: A Bright Spot for Human Health. Environ Health Perspect. 2008,116(4): A160–A167.5. What Are the Benefits of Sunlight? Healthline