Tannins

What are Tannins?

Tannins are a type of polyphenols that occur naturally in many plants, especially in fruits, leaves, and bark. They are known for their astringent properties and can impart a bitter taste, making them common in beverages such as wine and tea. Tannins play an important role in plants' defence against pathogens and insects.

Relation to related compounds

Tannins are part of a larger category of compounds called polyphenols, which also include flavonoids and stilbenes. Polyphenols are known for their structural diversity and functions in plant life. Tannins can be divided into two main types: hydrolysable tannins and condensed tannins. Hydrolysable tannins are more soluble in water and can be broken down by enzymes, whereas condensed tannins are more stable and found in many foods and beverages.

Forms in dietary supplements

Tannins can appear in various forms in dietary supplements, including capsules and powders. Capsules are a common form for those seeking a simple and measured intake method, while powders can be mixed into drinks or smoothies. Sublingual forms are less common for tannins, but some products may contain tannin-rich extracts that can be taken this way.

What is typically seen on the label

When reading labels on dietary supplements containing tannins, it is important to note the amount of tannin listed, usually in milligrams per serving. There may also be information about the specific source of tannin, such as extract from green tea or oak bark.

Safety and precautions

Generally, tannins are considered safe in the amounts typically found in foods and beverages. However, it is important to be aware that excessive consumption of tannin-rich supplements can cause discomfort in the gastrointestinal tract for some individuals. People with sensitive stomachs or specific health conditions should always consult a healthcare provider before starting to take supplements containing tannins.

Brief link summary

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