Losing 10 kg in 2 weeks is a very ambitious goal and may not be safe or sustainable for most people. It is generally recommended to aim for a weight loss of 1-2 pounds (0.5-1 kg) per week through a combination of healthy eating and regular exercise.

As for the website savoirmaigrir.fr, it appears to be a French weight loss program that offers personalized meal plans, coaching, and support. However, there is no specific product mentioned on the website that promises to help you lose 10 kg in 2 weeks.

Without more information about a specific product, it is difficult to provide details about its ingredients or materials, as well as its positive or negative effects. It is important to be cautious of any product that promises rapid weight loss, as it may not be safe or effective in the long term. It is always recommended to consult with a healthcare professional before starting any weight loss program or taking any weight loss supplements.