Citric acid

CATEGORY: Buffers
NATURAL OR SYNTHETIC: Natural

If you didn't enjoy double chemistry periods at school then the eight century Iranian Abu Musa J'bir ibn Hayy'n, or Geber to his friends, has a lot to answer for. Generally credited as being the "father of chemistry", uber-boffin Geber reputedly discovered citric acid along with mutiple other acids and processes. Citric acid is a weak acid found in most fruits and vegtables, which we use to balance the pH of our products to optimum levels for your skin.