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In this systematic study, we aimed to determine the significance of microgenderomes and the probable relationship between the gut microbiome and testosterone levels in men. In contrast, testosterone and other hormones influence the gut microbiome. This vast biological effect demonstrates that testosterone is important for the overall health of men, including mood, energy levels, and cognitive function (Li et al., 2022). The gonadotropin-releasing hormone secreted by the hypothalamus stimulates the pituitary gland to release luteinizing hormone, which then stimulates the testes to produce testosterone (Hohl, 2023).
Notably, germ-free male mice have a distinct transcriptional profile in the hippocampus compared to conventionally raised mice (Zhou et al., 2020). Firmicutes and Actinobacteria were more prevalent in men than in women, whereas Bacteroidetes were less prevalent (Koliada et al., 2021). A quantitative analysis of these study findings would be valuable; however, the data presentation across these studies differed significantly. Our assessment of the quality of all studies included using the New Ottawa Scale ≥8, indicating that the included studies were of good quality for review. Table 1 presents the details and characteristics of the included studies.
All of this reduces the active (free) form of testosterone in the body. The testes produces less testosterone, there are fewer signals from the pituitary telling the testes to make testosterone. In recent years, researchers (and pharmaceutical companies) have focused on the effects of testosterone deficiency, especially among men. Among women, perhaps the most common cause of a high testosterone level is polycystic ovary syndrome (PCOS). In addition, what may seem like a symptom of testosterone excess (see below) may actually be unrelated to this hormone.
Your hypothalamus and pituitary gland control the amount of testosterone your gonads (testicles or ovaries) produce and release. However, the majority of testosterone produced in the ovaries is converted to the primary female sex hormone, estradiol. Your adrenal glands also produce the hormone dehydroepiandrosterone (DHEA), which your body transforms into testosterone and estrogen.
Wilmanski et al. (2019) discovered that the gut microbiome positively correlated with a testosterone metabolite (5α-androstane-3β-17α-diol disulfate), and Bacteroides were anti-correlated with this metabolite. Wilmanski et al. (2019) discovered that the gut microbiome positively correlated with testosterone’s metabolic outcome (5α-androstane-3β-17α-diol disulfate), and Bacteroides were anti-correlated with this metabolite. Studies have suggested a possible relationship between the gut microbiome and androgen levels in men.

Gender: Female