Understanding why winter is harder on the body and mind Winter is not just colder—it fundamentally changes how the body and brain operate. Shorter daylight hours disrupt circadian rhythms, reducing serotonin and vitamin D levels. Cold temperatures force the body to burn more energy to maintain core heat, while limited outdoor activity reduces movement and…

The growing gap between sunscreen use and safety evidence Sunscreen is one of the most widely used personal care products in the world. It’s promoted by dermatologists, health authorities, and even sports organizations as a daily essential. Yet despite this near-universal recommendation, several commonly used sunscreen ingredients still lack robust, long-term safety data—especially when it…