Vitamin D is arguably the most important micronutrient supplement for people living in the UK — regardless of diet. But for keto dieters, it has additional significance.
The NHS recommends vitamin D supplementation for everyone in the UK from October to April. At UK latitudes (50–60°N), the sun angle is insufficient for vitamin D synthesis in skin for 6 months of the year.
Research consistently shows that vitamin D deficiency impairs insulin sensitivity. Correcting deficiency improves insulin signalling — directly supporting keto’s metabolic goals.
Vitamin D is a potent immune modulator. Deficiency is associated with increased susceptibility to respiratory infections, autoimmune conditions, and chronic inflammation — all relevant for keto dieters seeking optimal health.
Vitamin D supports calcium absorption (important when dairy intake varies), muscle function, mood regulation, and sleep quality — all areas keto affects.
1,000–4,000 IU daily in the UK during winter months. Take with a fatty meal (vitamin D is fat-soluble and absorbs best with fat). Our keto main dishes featuring fatty fish provide the perfect supplement companion, and our keto beverages pair well with daily supplementation routines.