Human biochemistry carefully explained
Enzymes, hormones, and signals — written for readers who want the machinery, not the jargon.
Latest Posts
Hormones and signaling
Cold hits the nerves first and the thyroid later
The first response to cold is sympathetic. Thyroid hormone turnover changes on a slower clock than shivering.
Energy metabolism
Lactate is a fuel, not the thing that burns
Working muscle ships lactate as a fuel other tissues can oxidize. The burn is not lactate acting as a toxin.