Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — vitamin D3 testing

Did you know that low vitamin D could be disrupting your sleep? Research shows that vitamin D plays a key role in serotonin and melatonin production — the hormones that regulate your sleep-wake cycle. Dr. Kate Placzek explores the science behind the vitamin D–sleep connection, what else low vitamin D affects, and how to find out if deficiency is at the root of your sleep problems.

Vitamin D is not just a vitamin — it is a steroid hormone that plays a critical role in fertility, conception, placental development and fetal health. From improving ovulation in women with PCOS to supporting sperm motility in men, adequate vitamin D levels matter at every stage of the journey to parenthood. Discover why testing before and during pregnancy is increasingly recommended.