Insights & Discussion
Tree nut consumption is inversely associated with the prevalence of hyperestrogenism and circulating estradiol levels in men.
This cross-sectional study utilized data from the US National Health and Nutrition Examination Survey between 2013 and 2016, and involved 3340 men aged 20 years and above. The associations of tree nut consumption with circulating estradiol - a form of the female sex hormone estrogen - and the prevalence of hyperestrogenism - a condition characterized by excess estrogen - were analyzed using weighted linear regression and binary logistic regression, respectively.
Tree nut consumption was observed in 207 of the participants, with the average usual intake amounting to 34.2g per day. The study noticed an inverse relationship between the typical intake of tree nuts and levels of bioavailable estradiol, even after taking into account all confounding factors. Regular consumption of 30g/day or more of tree nuts was associated with significantly lower risk of hyperestrogenism. Furthermore, higher consumption of tree nuts was linked with higher levels of circulating folate, which was in turn inversely related to circulating estradiol. Therefore, the study concluded that increased tree nut consumption could potentially lower the risk of hyperestrogenism in men by reducing circulating estradiol levels.
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Pomegranate juice supplementation has been found to effectively decrease testosterone levels in overweight and obese women diagnosed with polycystic ovary syndrome.
2023 Phytotherapy Research The effect of concentrated pomegranate juice on biomarkers of inflammation, oxidative stress, and sex hormones in overweight and obese women with polycystic ovary syndrome: A randomized controlled trial Abedini M, Ramezani‐Jolfaie N, Ghasemi‐Tehrani H, Tarrahi MJ, Amani R
Randomised Controlled Trial PCOS Testosterone
In the methodology, the study employed a randomized controlled trial which involved 44 participants. The women, aged between 18 and 40 years, had all been diagnosed with polycystic ovary syndrome and had a body mass index exceeding 25 kg/m. They were randomly divided, with one group consuming 45 ml/day of concentrated pomegranate juice and the other group receiving no intervention. A variety of biomarkers for sex hormones, inflammation, and oxidative stress were measured before starting the trial and again after eight weeks.
Further discussion of the results revealed a significant decrease in testosterone levels among the overweight and obese women with polycystic ovary syndrome who took concentrated pomegranate juice over the eight week period, in contrast to those in the control group. Apart from testosterone, no significant changes were observed for luteinizing hormone, sex hormone-binding globulin levels or for markers of inflammation and oxidative stress between the two groups.
Nutraceuticals like zinc, vitamin D, l-arginine, mucuna, ashwagandha, tribulus, and ω3 fatty acids, along with lifestyle changes, can mildly improve male testosterone levels and sperm parameters.
2022 Clinical Therapeutics Nonpharmacological Interventions for the Management of Testosterone and Sperm Parameters: A Scoping Review Santos HO, Cadegiani FA, Forbes SC
Review Article Sperm Quality Testosterone
A comprehensive scoping review was undertaken to investigate the effectiveness of nonpharmacologic interventions such as dietary supplements, herbal remedies, diverse diets, sleep patterns, and various forms of physical exercise. The study was aimed to understand their potential in enhancing male health by improving testosterone levels and sperm parameters, especially in men with hypogonadism or fertility issues.
Results indicated that among a multitude of nutraceuticals and functional nutrients that claim to stimulate testosterone production, only a select few, including zinc, vitamin D (in cases of its deficiency), l-arginine, mucuna, and ashwagandha, based on well-conducted randomized clinical trials, showed positive results in men with low testosterone levels and related complications. Except for l-arginine, these and other natural substances like tribulus and omega-3 fatty acids showed potential to enhance sperm parameters in infertile men. Implementing proper diet, ensuring adequate sleep and regular exercise are considered crucial, particularly in obese patients. It's also highlighted that androgen receptor content is potentially more significant in muscle hypertrophy than endogenous androgens. While the impact of nonpharmacologic interventions on testosterone levels are modest and do not translate into significant clinical benefits, some supplements and herbal medicines could serve as adjunctive approaches in testosterone and sperm health management. However, proper use of nutraceuticals involves personalised consideration by care providers.
In women with polycystic ovary syndrome, cinnamon reduced insulin resistance and testosterone levels similar to metformin, and ginger decreased follicle-stimulating and luteinizing hormones.
2022 Frontiers in Nutrition A comparison of the effects of cinnamon, ginger, and metformin consumption on metabolic health, anthropometric indices, and sexual hormone levels in women with poly cystic ovary syndrome: A randomized double-blinded placebo-controlled clinical trial Dastgheib M, Barati-Boldaji R, Bahrampour N, Taheri R, Borghei M, Amooee S, et al.
Randomised Controlled Trial Ceylon Cinnamon Cinnamon FSH
In the methodology of the study, 100 women diagnosed with polycystic ovary syndrome were divided into four groups. Each group received a different treatment: cinnamon, ginger, metformin, or placebo. The dosage for these treatments was 500 mg, three times a day, administered over a period of 8 weeks. The participants' sex hormones, weight revelations, along with glycemic and lipid markers were monitored before and after this period. Several participants were disqualified because of unspecified factors, resulting in a final sample size of 83.
In terms of results, all groups saw a decrease in weight and body mass index. The metformin and cinnamon groups specifically had notably decreases in their insulin resistance, meaning that these treatments were effective in improving metabolic health. Additionally, the ginger group experienced a reduction in follicle-stimulating hormone and luteinizing hormone levels unlike the other groups. Testosterone levels were lowered in the metformin and cinnamon groups, but no significant changes in dehydroepiandrosterone were observed in any of the groups. These results indicate the potential use of cinnamon and ginger as alternative treatments in managing polycystic ovary syndrome.
Walnut consumption coupled with concurrent training improves lipid profile, steroid hormone levels, and systematic inflammation in elderly men.
2021 Biology of Sport Moderate walnut consumption improved lipid profile, steroid hormones and inflammation in trained elderly men: a pilot study with a randomized controlled trial Kamoun A, Hammouda O, Turki M, Maaloul R, Chtourou M, Bouaziz M, et al.
Randomised Controlled Trial Cholesterol Cortisol CRP
The study created two matched groups of fit elderly men and placed one on a diet inclusive of walnuts (15g/day for six weeks) alongside their concurrent (resistance and endurance) training. The other group did the concurrent training without the walnut-supplemented diet. The study then took fasting blood samples from the participants 48 hours before and after the intervention for biochemical assessments.
The group consuming walnuts saw a significant improvement in their lipid profiles with increased high-density lipoprotein levels and decreased total cholesterol, low-density lipoprotein and triglyceride levels. The walnut-eating participants also saw an increase in testosterone levels after the training, which was significantly higher than the group not consuming walnuts. Additionally, the walnut-consuming group experienced lowered cortisol levels and decreased C-reactive protein compared to the group not consuming walnuts. It is plausible the results could be attributed to the presence of polyunsaturated fatty acids in walnuts.
Ginger significantly improves sperm health, enhancing quality parameters like count, viability, motility, morphology and DNA integrity, thereby boosting fertility.
2021 Veterinary Medicine and Science A systematic review on the effect of Ginger (Zingiber officinale) on improvement of biological and fertility indices of sperm in laboratory animals, poultry and humans Gholami‐Ahangaran M, Karimi‐Dehkordi M, Akbari Javar A, Haj Salehi M, Ostadpoor M
Systematic Review Ginger Male Fertility Sperm Quality
The study investigated the impact of ginger on semen quality across different species. It focused on key sperm parameters including count, viability, motility, morphology, and DNA integrity. The research pointed to the antioxidant properties of ginger, attributed to active phenolic compounds, which disrupt the production of free radicals - these are known to cause oxidative stress and negatively impact the quality of sperm. The study also noted ginger's androgenic activity and the associated influence on the levels of gonadotropin and sex hormones, such as testosterone.
In the discussion of results, it was identified that ginger minimizes DNA failures, reduces damage to the mitochondrial genome in sperm cells, and essentially moulds a sperm with apt morphological structure. The sperm, under the influence of ginger, attains progressive motility, high viability, and increased fertility. Overall, the entire fertility indicators of sperm also saw an upswing with the usage of ginger - reinforcing its effectiveness in increasing the total motility, survival rate, the normal morphological structure of sperm, and the number of sperm cells.
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Tree nuts included almonds, Brazil nuts, cashews, chestnuts, hazelnuts, macadamia nuts, pecans, pine nuts, pistachios, and walnuts as well as butter from these tree nuts.
—Jinnan C 29 Dec 2023