It is used to reduce the absorption of glucose into the body, and also reduce the sweetness of foods, both of which are desirable for those wishing to lose weight and to reduce the level of sugar in their blood. It was used for this purpose in Ayurvedic medicine, subjects being given the leaves to chew. As with many other ancient Ayurvedic remedies, this use of gymnema sylvestre has passed into modern times, and has sound scientific basis. First, however a bit more about the plant itself.
It is found predominantly in the Western Ghats, and also to the west of the mountains, around coastal Goa. It is a vinous plant that climbs on other bushes and trees, known in Sanskrit as Meshasringa, or ram's horn after the shape of the leaves from which the supplement is extracted. For what it's worth, the official name seems a mix of Greek and Latin (gymnos(Gr) - naked and Silva (L)- forest) for naked forest. That, however, is irrelevant to its uses, so let's have a look at the science involved and the active ingredients in the plant.
The main constituents are terpenoid saponins known as gymnemic acids, so one can assume that they were first found in this plant. They are glycosides, including hodulcine and ziziphin, which act as sweetness inhibitors so that there is no sweet taste in anything that is sweetened by sucrose. There are over 20 types of gymnemic acid in the leaves, of which the strongest, Gymnemic Acid 1, can suppress the sweetness even of artificial sweeteners such as aspartame.
These are not irreversible effects, and last only about 10 minutes, after which normal sweetness is detectable by your tongue. During the active period, however, a solution of normal sugar will taste like ordinary unsweetened water. However, is this just a matter of taste, or does it affect the sugar itself?
Studies have shown that animals fed the leaves of Gymnema sylvestre develop hypoglycemia, probably because it stimulates the pancreas to generate insulin that reduces the level of sugar in the blood. Further studies have shown the presence in the leaves of a number of types of acylated derivatives of deacylgymnemic acid. There are well over a dozen types of saponins known to be contained within the leaves.
Other chemicals found include anthraquinones, flavanoids, chlorophylls, querticol, phytin, a number of glycosides and anthraquinones. The bush also contains alkaloids, although these are constituents in most plants used in ancient remedies. This is by no means all of the chemicals discovered, and many of the minor benefits of using it could be due to the minor constituents of this amazing little leaf.
A study of the above constituents will reveal a few antioxidants, and it is no surprise that the extract from Gymnema sylvestre also possesses anti-inflammatory properties. Gymnemic acid is believed to have a similar chemical structure to saccharose, and the plant extracts can be used not only to reduce a craving for sugar, but also to treat digestive problems and high cholesterol levels. So what scientific evidence is there other than the obvious effects reported by those that use it?
A study in the UK in 2005 found that an aqueous extract of Gymnema sylvestre caused the secretion of calcium and insulin from mouse and human cells to be increased at a specific concentration without affecting the cellular function. This means that the supplement can be used to stimulate the secretion of insulin with people with Type 2 diabetes without otherwise affecting health. Its usefulness to diabetics is obvious, but there are other health benefits to those that are not diabetic.
Anything that modulates a sweet tooth must be of use to those seeking to lose weight, particularly if they feel the need for sweet foods. In fact Gymnema tends to reduce food cravings for carbohydrates and sweets, and can be used by those seeking a natural means of curbing their appetite for sweet and sugary foods. Because excess weight can lead to diabetes,
Although there have been many discussions about the biochemical mechanism of the gymnemic acids in this effect on taste, recent evidence suggests that the phytochemicals act on both your taste buds and on those parts of the intestine responsible for absorbing nutrients from digested foods.
Not only that, but studies have also indicated that Gymnema sylvestre removes the bitterness of acerbic chemicals such as quinine in the same way that it removes the sweetness form cakes and candies, and if you drank tonic water it would taste just like water. On the other hand, if you ate an orange, you would taste the acidity but not the sweetness.
The way to use this remarkable supplement is to follow the instructions, and within about a week you will be able to control your appetite much better, and any cravings for carbohydrates you previously had will be much reduced. After a month or so, you will notice an accelerated rate of weight loss if you had been overweight, and diabetics will find a significant reduction on blood sugar between insulin shots.
Gymnema sylvestre can take care of any sugar or carbohydrate cravings, and is of significant use to the overweight, obese or to diabetics, and the mechanism by which it works has now been all but understood, although there are still some biochemical secrets that this amazing plant has yet to reveal. This amazing herb can be found at your local or internet vitamin store.