Vitastrong TESTOBOOSTER helps increase and maintain testosterone levels, an important hormone for athletes. For a long time, Vitastrong has distinguished itself from other products on the market by creating strong, truly effective formulations, investing significant sums of money and resources in the company's Research and Development department. Through the combination of the following natural ingredients: Tribulus Terrestris (95% Saponins) - The active ingredient in tribulus is saponins, which help maintain hormonal activity in good condition. The Tribulus terrestris in the TESTOBOOSTER contains 95% saponins, one of the highest concentrations on the market, infallible in increasing testosterone. It also improves libido and sexual desire, helps increase muscle mass and physical performance. 750mg per daily dose KSM-66® Ashwagandha - For an herb to work systematically, a complex mixture of phytochemicals with a wide range of actions on the human body is needed. Ashwagandha is one of the few herbs in the world with such a complex mixture. Important studies have shown its effectiveness in reducing stress and anxiety in adults, thus improving quality of life. Other proven benefits include improving testosterone levels, cardiorespiratory endurance, significantly increasing muscle mass and strength, correct management of body weight in adults under chronic stress, improvements in attention and processing speed of information, usefulness for normalizing thyroid indices, and improving sleep quality. For clinical studies: click here 750mg per daily dose Zinc - important for the body as it is one of the enzyme complexes necessary for the proper functioning of hormones, insulin, sex hormones, and growth hormone. Zinc, due to its properties, is a fundamental element for a balanced body growth and for controlling metabolism and weight. 15mg per daily dose Iron - a fundamental component of hemoglobin (the protein that carries oxygen from the lungs to the rest of the body) and myoglobin (the protein that supplies oxygen to the muscles), but not only. This mineral also takes part in the activity of many enzymes and the body needs it to produce some hormones and connective tissue. 30mg per daily dose Vitamin D - in its activated form, vitamin D actually acts as a hormone that regulates various organs and systems and is important in the control of inflammation and the immune system. 50mcg per daily dose RECOMMENDED SUPPLEMENTS If your goal is to increase testosterone levels to improve athletic performance and increase muscle mass, we recommend combining VITASTRONG TESTOBOOSTER with: VITASTRONG BCAA 4.1.1 VITASTRONG PREWORKOUT VITASTRONG CREATINE