#Sun

How ultraviolet radiation releases the skin's nitric oxide to regulate blood pressure and fight cardiovascular risk

How UVB radiation and vitamin D3 switch on the natural defenses that fight this gastric pathogen

How your microbiota dictates your defenses, your headaches and your daily energy

Why the sunlight you meet on waking is the biochemical signal your body needs to oxidise fat efficiently

The visual toll of modern life, and the scientific evidence on how the sun restores the metabolism of vision

Lipid peroxidation, internal photoprotection and a practical guide to eating: from the armour of grass-fed fat to the danger of industrial oils

How UVB radiation switches on receptors that reinforce the intestinal barrier and tune immunity

How our cells work as electrical batteries tuned to the photoperiod and to solar radiation

How the solar spectra of dawn, noon, and dusk coordinate cell biology and vitamin D