Active Yeast, scientifically known as *Saccharomyces cerevisiae*, is a remarkable single-celled fungus crucial not only for fermentation in baking and brewing but also possessing a robust nutritional profile when considered in its dried, inactive form (though active yeast is often consumed after baking/cooking, reducing viability).

From a nutritional standpoint, 100 grams of dry active yeast provides a significant concentration of macronutrients, notably featuring an exceptionally high protein content, often exceeding 40 grams. This protein is considered high biological value, supplying essential amino acids necessary for muscle repair, enzyme production, and overall cellular function.

The carbohydrate component, typically around 38 grams per 100 grams, is primarily composed of complex polysaccharides, with a remarkable portion—about 23 grams—constituting dietary fiber, particularly beta-glucans. These beta-glucans are powerful soluble fibers linked to supporting cardiovascular health by aiding in cholesterol management and stabilizing blood glucose levels, contributing to improved glycemic control.

Yeast is perhaps most famous for being a powerhouse of B vitamins. It naturally contains substantial amounts of Thiamine (B1), Riboflavin (B2), Niacin (B3), Pyridoxine (B6), and Folate. These B vitamins are indispensable coenzymes crucial for energy metabolism, converting carbohydrates, fats, and proteins into usable fuel. Adequate intake of Folate is vital for DNA synthesis and repair, making yeast a valuable dietary source.

Furthermore, yeast provides crucial trace minerals. It is an excellent source of Selenium, an antioxidant mineral vital for thyroid function and immune defense, and a good source of Zinc, which supports immune system integrity and wound healing. Potassium and Phosphorus are also present in high concentrations, essential for fluid balance, nerve signaling, and bone health. Cholesterol and trans-saturated fat levels are negligible, making this a truly nutrient-dense, heart-healthy ingredient when incorporated into a balanced diet.