The Taiyo library

Sunlight, in context.

Start with a question. Follow the sources. Understanding it shouldn’t be complicated.

Start here / Essential guide

Vitamin D and sunlight: from light to skin.

How they connect, what changes production and why “15 minutes a day” doesn’t answer every question.

Explore by question

A guide for each question

Visible light, glass and UVB.

What changes between the lab and daily life.

Latitude, seasons and the height of the sun.

Skin, clothing, place and time. Explore how the minutes change in our calculator.