How does a thick extract differ from an ordinary herbal decoction or tincture? — thick extract of common aspen bark 110 g-Visterra

To make a thick extract of aspen bark, the raw material is extracted and then evaporated: excess moisture is removed, while the plant substances remain in concentrated form. The result is a dense mass that does not need to be brewed, steeped or strained — unlike a home-made decoction.

This fundamentally sets the product apart from dried herbal material and from alcohol tinctures. Dried material takes time to prepare and gives a different result each time depending on the water temperature and steeping time. An alcohol tincture contains ethanol, which matters for people who avoid alcohol. A thick extract has neither of these issues.

Aspen bark contains tannins, natural phenolic compounds and bitter substances — they give the extract its characteristic astringent, slightly bitter taste. In concentrated form this taste is more noticeable than in a weak decoction, so the extract is taken dissolved in warm water: two measuring spoons (2 g) per 100–150 ml.

It is important to understand that the concentrated form is not a neutral drink but an active plant product. It is not taken in case of individual intolerance to its components. People with a sensitive stomach or a tendency to allergies, as well as pregnant and breastfeeding women, should consult a specialist before starting to take it.