---
title: Wine (composition) - Santa Margherita wines
description: What is meant by wine (composition)? Discover the meaning of terms related to the world of wine in the Santa Margherita wine glossary.
author: Santa Margherita
url: https://www.santamargherita.com/en/glossary/w/wine-composition
---

# Wine (composition)

According to the law, 'wine is only the product of total or partial alcoholic fermentation of fresh or slightly dried grapes…' But what is there in a bottle of wine? The transformation of the fruit (grapes) into a drink (wine) leads to it having hundreds of components, of which the vast majority are present only as minimal traces or in traces which may be considered negligible. The main ones are:
Water: 78-85%
Sugars: mostly glucose (from 7.5 to 15%) and fructose (7.5-16%)
Peptins: 0.2-0.3‰
Gums, mucilagenous substances: trace
Organic acids: tartaric (5-10‰), malic (2-5‰), citric (0.2-0.5‰)
Inorganic acids: sulphuric (0.2-0.7‰), phosphoric (0.3-0.5‰), chloridic (0.02-0.2‰)
Polyphenolics: flavonol (0.05‰), anthocyans (0.05‰), leucoanthocyans (0.02-1‰), tannins (0.5-2‰), resveratrol (trace)
Nitrogenous substances: trace
Vitamin (P, C and B group): trace
Mineral elements: potassium (0.5-1.5%), calcium (0.05-0.2‰), magnesium (0.08-0.1‰), sodium (0.01-0.05‰), iron (trace)