Thiamin or Vitamin B1 is an essential nutrient obtained from food sources such as whole grains pulses nuts and seeds. Lamberts® Thiamin is a high strength supplement that is made to pharmaceutical standards. Diets low in whole foods may provide inadequate intake of thiamin and it is recognised that thiamin contributes to the normal functioning of the nervous system heart the heart and the immune system as well as to normal psychological function. A full 100mg of thiamin per capsule. Made in the UK to pharmaceutical standards of GMP. Daily Intake: 1 capsule.