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What is Thiamin?

Thiamin (vitamin B1) is the first B vitamin to be discovered and is a water-soluble vitamin essential for energy metabolism. Its biologically active form, thiamin diphosphate, serves as a coenzyme for several key enzymes in carbohydrate metabolism, including transketolase, pyruvate dehydrogenase, and α-ketoglutarate dehydrogenase. These enzymes are central to the conversion of food into cellular energy via the Krebs cycle — the metabolic pathway that generates the majority of the body's ATP.

Thiamin is particularly important for tissues with high energy demands, including the heart, brain, and nervous system. The nervous system depends entirely on glucose for its energy supply, and thiamin is required for glucose metabolism. Even a mild thiamin deficiency can impact neurological function and psychological well-being. Because thiamin is water-soluble and not stored in significant amounts, regular dietary intake is essential to maintain adequate levels.

EFSA-approved health benefits

The European Food Safety Authority (EFSA) has confirmed that thiamin:

• contributes to normal energy-yielding metabolism
• contributes to the normal functioning of the nervous system
• contributes to normal psychological function
• contributes to normal heart function

Why we use Thiamin in Nutri-Leaf formulas

Nutri-Leaf Vitamin B Complex provides 1.1mg of thiamin per capsule (100% NRV) alongside the seven other essential B vitamins in a comprehensive once-daily formula. The B Complex uses active, bioavailable forms of B vitamins throughout, ensuring that the body can utilise each nutrient without requiring additional metabolic conversion steps.

Products containing Thiamin

The Nutri-Leaf product featuring thiamin is Vitamin B Complex, which provides all eight B vitamins at 100% NRV per capsule in active, bioavailable forms for comprehensive energy and nervous system support.

Learn more about the role of B vitamins in energy metabolism on our Energy & Vitality and Stress Management health guides. Visit the Ingredient Philosophy page for our approach to B vitamin formulation.

Food supplements are not a substitute for a balanced and varied diet and a healthy lifestyle.