Dietary products

Protein sources and amino acids

Dietary protein supplies amino acids used in body tissues and functions. Sources may include milk, eggs and plants such as soy or peas. Caseins and whey proteins represent different fractions of milk. Amino-acid composition and digestibility contribute to the nutritional profile. Concentrated powders, drinks and cooking preparations then combine these ingredients with carbohydrate, fat or fibre. The source protein and complete food recipe therefore provide different information, while the physical form describes another characteristic of the finished preparation.

Gluten, lactose and adapted recipes

Gluten concerns cereal proteins found in wheat, barley and rye. Lactose is a sugar broken down by lactase into glucose and galactose. These components therefore belong to different molecular families. Changing a recipe for gluten and reducing its lactose content are different adaptations. Milk proteins remain another specification again. A lactose-free preparation may contain dairy ingredients, while a gluten-free recipe can still contain substantial starch. This explains why one ingredient-related statement cannot describe every nutrient or allergen in the complete food.

Glucose, sodium and oral rehydration

Oral rehydration solutions combine glucose and electrolytes in a defined composition. Intestinal glucose absorption is linked to sodium transport, supporting water absorption. Potassium salts, chlorides and citrate may complete the balance according to the formula. Dissolved-particle concentration is a different property from the drink’s taste. This physiology distinguishes oral rehydration from a predominantly protein supply or a caffeine-containing product associated with alertness. The full formulation explains its purpose more precisely than a sweet flavour or the presence of one mineral alone.

Nutrient supply, texture and food purpose

An adaptation may concern an ingredient, energy, protein or consistency. Clinical nutrition foods have defined medical purposes, while adapted ordinary foods have their own recipe characteristics. A thickened drink and a protein-rich dessert may have similar textures but different nutrient contributions. Nutrient source, molecular form and finished food are therefore complementary levels of description. This connects ingredient properties with the actual nutritional function of each family, while preserving the distinction between a complete food and a preparation addressing only one particular aspect of nutrition.

Frequently asked questions