I have already talked about slimming clothes that push the body to sweat, carrying out a fat-burning action . Today we see the case of the famous Redu Shaper , a new product, similar to an elastic tank top, which with its particular fabric (made according to a technology called “neopower” which knows so much about marketing) slightly compresses the body at the height of the abdomen and the basin, and promotes the loss of fluids by making you sweat like pigs pressed in a container inside a fallout shelter in August.
Heirs of the famous Spandex , all these garments promise the same things: the heat generated by the fabric should burn fat, allowing you to lose weight through a thermogenic action.
The first question to ask is: does sweating make you lose weight?

The answer to this question is no. The fat mass contains very little water, unlike the lean one.

The adipocyte is a cell with a low concentration of water, therefore any thermogenic action can push the body to get rid of the interstitial fluid, the one between blood and cells ( source ).
In practice, heat can at most push the body to get rid of some water between the cells.

The second question is: is fat burned with heat?

Again no, fats do not melt with heat, unless by fat you mean the slice of bacon in the pan. If we talk about our meat, no. The heat simply deprives us of fluids, which the body will tend to replenish when we stop using the sheath or garment. The idea that is exploited is that fats can be burned, poof, disappearing. But we know that nothing is created and nothing is destroyed. How should fat dissolution take place? Since the adipocyte is not destroyed, it should be emptied in order to lead to weight loss. This only happens when the body uses it for energy, thus drawing on fat to produce heat. Specifically, in conditions of body temperature to be restored, it isbrown fat activates this thermogenesis , prompting the body to burn calories, thus raising the metabolism.

However, the action of shorts and slimming garments does not push the conversion of normal adipocytes from white to beige to dark, nor does it appear to activate brown fat . There will undoubtedly be calorie expenditure, but marginal compared to diet and exercise.
So as long as we use the Redu Shaper or any other garment, we will feel more compressed and we will see ourselves slimmer simply because we have lost a lot of fluids and because these fabrics have a compressing action; once we stop using them, the body returns to its original condition. And in this time frame, our fat mass variation is zero, which is why many users have confirmed the poor effectiveness of the Redu Shaper.