Red Vine Leaf
ANTISTAX® contains a unique and clinically proven red vine leaf extract AS195®. It is enriched in a special process and sparingly dried. The leaves themselves grow on red grape vines in many areas of the world. French wine producers traditionally used to make a range of infusions from red vine leaves; the leaves are often eaten as part of a normal diet.
Red vine leaf extract is now known to contain a range of valuable substances, including flavonoids, which can help keep leg veins healthy. Red vine leaf extract is obtained from the leaves of the red grape vine after steeping them in water at 70-80 degrees. The liquid from the extract is evaporated to form the dry vine leaf ingredients, which are used to make ANTISTAX®. The dry extract of red vine leaf contains many herbal substances, including the flavonoids quercetin and isoquercitrin.
Red vine leaf standardisation
Standardisation means guaranteeing the minimum content of the active supplement in the extract. Standardisation is necessary in order to ensure the consistent quality of the product for the consumer to rely on. This gives the confidence that AS195® red vine leaves extract contained in ANTISTAX® is the same from pack to pack, from year to year.
Obtaining active ingredient from red vine leaves
The leaves for ANTISTAX® red vine leaf extract come from vines of Vitis vinifera Linné.
These grapevines have blackish-blue grapes with a red centre. In the autumn they bear strikingly red-coloured leaves. On fermentation, the grapes yield deep-red wines. In earlier times, they used to be blended with light-red varieties in order to make the colour appear more attractive.
The red-leaved vines are cultivated in warm and dry regions of Europe, Africa and in South America. The red vine leaf is harvested following the grape harvest. It is at this time that the leaves have the highest content of the key ingredients. After being harvested, the leaves are dried and then extracted using purified water, a method that is dependent upon precise temperature control. In this process, the extracting agent perfuses the comminuted leaves and dissolves out the ingredients in several stages. The liquid phase is separated from the raw material residue and dried, leaving the active ingredients extracted from the leaves.