The Journal

Stories. Insights. Science.

Formulation thinking, ingredient deep-dives, and the research behind what we put in.

Immune Defence

Vitamin D3 and K2: why take them together?

The short answer: vitamin D3 drives calcium absorption, and vitamin K2 directs where that calcium actually goes. Without K2, research suggests the calcium mobilised by...

Stress & Cortisol

Can high cortisol cause insomnia?

Yes — and the evidence is reasonably consistent on this. Elevated evening cortisol appears to be one of the more plausible physiological drivers of sleep-onset...