Fermented dairy products like kefir are a little-known magic bullet for muscle building. Kefir is the perfect addition to any muscle-building blender bomb, providing distinct nutritional advantages over water or regular milk. If you usually use water in your shakes, 1 cup of kefir will add 150 calories to your diet. Compared to regular milk, kefir will allow your meal to be more easily digested due to the presence of probiotics (up to 10 billion good bacteria per cup). These healthy bacteria will help keep your digestive track running at peak condition so it can break down and assimilate a maximum amount of calories and nutrients from your meals.
Commercial synthesis came next. In the 1930s, Austrian chemists were synthesizing male and female hormones from soybean sterols (cholesterol-like substances). This process was expensive because it was hard to separate the sterols from each other. American chemist Percy Julian (1899-1975) discovered a much easier way to separate sterols, which permitted inexpensive synthesis of both progesterone and testosterone. American chemist Carl Djerassi (1923-) is also noted for synthesizing estrone and estradiol (estrogens) from plant materials.