Ashwagandha, tongkat ali, fadogia agrestis, and boron are all natural ingredients that have been claimed to boost testosterone levels. Here is what the research has to say about these ingredients:
Ashwagandha: Some studies have suggested that ashwagandha, an herb commonly used in Ayurvedic medicine, may help to increase testosterone levels. For example, a study published in the Journal of the International Society of Sports Nutrition found that men who took ashwagandha for eight weeks had an increase in testosterone levels (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5796020/).
Tongkat ali: Tongkat ali is a plant commonly used in traditional medicine to enhance male fertility and libido. Some studies have suggested that it may also help to increase testosterone levels. For example, a study published in the Journal of the International Society of Sports Nutrition found that men who took tongkat ali for eight weeks had an increase in testosterone levels (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5796020/).
Fadogia agrestis: Fadogia agrestis is a plant commonly used in traditional African medicine for its alleged sexual enhancing effects. Some studies have suggested that it may help to increase testosterone levels. For example, a study published in the African Journal of Traditional, Complementary, and Alternative Medicines found that men who took a supplement containing fadogia agrestis had an increase in testosterone levels (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4385346/).
Boron: Some studies have suggested that boron, a trace mineral, may help to increase testosterone levels. For example, a study published in the Journal of Trace Elements in Medicine and Biology found that men who took a boron supplement had an increase in testosterone levels (https://www.ncbi.nlm.nih.gov/pubmed/19882687).
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