Glyphosate is the main active ingredient in the weedkiller RoundUp, which is manufactured by Monsanto and owned by Bayer. The reason why glyphosate works so well as a herbicide because the weed absorbs the glyphosate. The glyphosate then blocks enzymes within the root so that the weed is not allowed to metabolize nutrients any more. As a result, the weed dies.
The problem is that if a person is exposed to glyphosate, then the glyphosate blocks enzymes within that person’s cellular development throughout the immune system. That explains why thousands of people have obtained cancer from using RoundUp.