Testosterone regulates cytokine expression through androgen receptors, modulating the inflammatory response (10). A decline in testosterone secretion significantly contributes to changes in the body composition of aging males (6), marked by a decrease in fat-free mass and an increase in fat mass. In particular, cytokines such as IL-6, TNF-α, and adipokines like leptin could provide additional mechanistic insights and better reflect tissue-specific inflammatory processes. This enzymatic transformation inhibits the hypothalamic–pituitary axis, thereby diminishing testosterone synthesis (3). If you adjust training volume, change your sleep routine, or shift your diet, these markers often respond within weeks to months. A single read gives you a baseline; a few data points show a trend. Together, these markers separate "cholesterol load" from "artery irritation," which guides smarter prevention conversations. ApoB reflects the number of atherogenic particles; hs‑CRP captures the inflammatory milieu in which those particles interact with artery walls. Low LH and FSH with low testosterone point toward central suppression; high LH and FSH suggest the gonads aren’t responding. To interpret testosterone intelligently, look at SHBG, LH, FSH, and estradiol. Free testosterone can be directly measured by equilibrium dialysis or estimated by calculation using SHBG and albumin. Data from studies of the effect of testosterone replacement therapy (TRT) on levels of inflammatory markers are not always consistent. Scatterplots presented in Figure 1 show fairly linear associations between CRP and sex hormone levels on the log scale. Characteristics of the men included in the analysis are presented in Table 1 and descriptive statistics on sex hormones and CRP levels are included in Table 2. Serum testosterone (T) and sex hormone-binding globulin (SHBG) levels were measured by competitive electrochemiluminescence immunoassays on the 2010 Elecsys system (Roche Diagnostics, Indianapolis, IN). The association between CRP and sex hormone levels was assessed using multiple linear regression models. Analyses were conducted on 1,559 men with complete data on CRP and sex hormone levels. Mean concentrations of total testosterone… Furthermore, hsCRP was observed to increase the risk of biochemical hypogonadism in men independent of age, obesity, and other confounders. However, CRP is known to be unspecific, and the use of other inflammatory markers such as IL-6 might provide a more precise estimate of inflammation (3, 36). All material, information, data, and content that Function Health provides is strictly for general information purposes. Function Health is a healthcare technology company and not a laboratory or medical provider. Best money I have spent on healthcare. I am thrilled to know more about my health and how to improve it. 100+ lab tests chosen by the world’s top doctors to help give you the most complete picture of your current and future health. For cardiovascular risk, hs‑CRP is the appropriate test; standard CRP isn’t sensitive enough at low levels. Opioids, glucocorticoids, and some androgen‑suppressing drugs can lower testosterone; androgen therapy or anabolic agents can raise it. Restrict sleep for a week and morning testosterone can fall noticeably in healthy men; sleep extension tends to restore it. Low CRP generally signals low background inflammation, which is desirable for long-term cardiovascular health. Sometimes the number looks low because SHBG is high, making free testosterone lower even when total seems okay. For heart health, persistently high hs‑CRP alongside elevated ApoB or LDL‑C strengthens the case that arteries are under inflammatory stress. A direct association between BMI and hsCRP was observed across demographic variables such as age, sex, ethnicity, and education. In contrast, a study involving 890 men showed that testosterone deficiency was present in 20% of individuals aged 60–89 years, 30% in those aged 70–79, and 50% in participants over 80 years old (23). The relationship between anthropometric factors, and hormone levels in the group of patients with testosterone deficiency syndrome (TDS) according to hsCRP concentration. Relationship between anthropometric factors, and hormone levels in the group of patients without testosterone deficiency according to hsCRP concentration. Relationship between anthropometric factors, hormone levels, and hsCRP in patients with and without testosterone deficiency. In Table 3, the relationship between anthropometric factors, and hormone levels in the group of patients with testosterone deficiency (TDS) was analyzed based on hsCRP concentration. In Table 2, the relationship between anthropometric factors, and hormone levels in the group of patients without testosterone deficiency was analyzed based on hsCRP concentration. The diversity of results from previous studies highlights the need for further research that considers both hormonal and anthropomorphic factors influencing this relationship. Conversely, other studies fail to corroborate such a distinct relationship (13, 14). Numerous studies indicate the existence of a relationship between these two parameters; however, the results of these studies are often contradictory and dependent on various factors. The literature on this topic exhibits a diversity of perspectives regarding the relationship between CRP and androgens in men and androgen levels. Studies suggest a bidirectional relationship between obesity-stimulated cytokine levels and TT (11).
