Tannic acid is a specific type of tannin. ... Regular coffee and decaf contain both tannic acid and tannins… but what's the difference between these two terms? Tannins are naturally occurring organic substances known as polyphenols. They are found in many foods and drinks such as wine, tea, cheese, nuts, berries and beers.

Does decaf coffee inhibit iron absorption?

Caffeine has no effect on iron absorption so if someone is concerned about lack of iron there is no point in switching to decaf coffee. For healthy people, there is no issue with iron absorption.

Is there coffee without tannins?

One of the main sources of tannins was oak bark, called tann in ancient Celtic languages, but any plant compound that would bind the proteins in animal skin could be used. ... However, the fact that this one isolate turned out to be mainly chlorogenic acids does not prove that no tannins are present in coffee at all.