Organic natural substances (protein bodies, proteins) that come from amino acids are composed and constitute a main component of all living things. In the grape seeds they are in the pulp of the grapes contain, more proteins are formed in dry years. In the fermentation they serve as food for the yeast. In larger quantities, the so-called thermolabile protein causes haze-like, gray cloudiness and is eliminated by bentonite away. Various protein-containing agents are used for beautiful and clarify of the wine used, among others albumin. egg white. gelatin. isinglass. lysozyme and casein, All of these substances are positively charged electrically and therefore attract negatively charged substances.
If there is too much thermolabile wine protein in the bottle, the two can wine faultsprotein haze and Käseln occur. Proteins can be found in humans allergies trigger with sometimes strong reactions. From a quantity of 0.25 mg / l in wine, this is why label declarable. Vegetarians and vegans reject wines treated with protein products (see under vegetarian wine ). Even the incompatible with certain diseases gluten is a protein, but wine is usually gluten-free. See limits below ADI (acceptable daily intake) and a list of all wine ingredients under total extract,