The sunshine vitamin, personalised: how genetics shape your vitamin D needs

By Melicia Gomes
2 July 2025

There’s nothing quite like a sunny day to lift your spirits—but did you know that the sun is doing more than just brightening your mood? Behind the warmth on your skin lies a fascinating biological process that helps your body produce vitamin D, a nutrient essential for everything from bone health to brain function. While sunshine is a powerful source, your body’s ability to synthesise and use vitamin D is influenced by more than just time spent outdoors—it’s also written in your genes. Discover how your unique genetic blueprint affects your vitamin D metabolism, and how 3X4 Genetics can help you personalise your path to better health.