What is behind Male Fertility & Sperm Health
Sperm production and the hormonal axis that sustains it. A fact worth knowing: exogenous testosterone suppresses FSH and LH and lowers fertility â testosterone and fertility do not move together. Evidence A — Human trial evidence.
The shape of the night — deep sleep early for physical repair, dream sleep late for memory — not just its hours. Evidence A — Human trial evidence.
Serum testosterone — the anabolic signal behind muscle, drive and libido in men. The evidence shows a finding that overturns the common story: suppression under stress is centrally mediated — the brain down-regulating the axis — 'despite intact gonadal capacity'. The organ is rarely the problem. Evidence A — Human trial evidence.
The hypothalamic–pituitary–gonadal axis — the command line of sex-hormone production and reproductive health. Evidence A — Human trial evidence.
The pulse generator of reproduction. Its own neurons lack estrogen receptors, so all steroid feedback must route through kisspeptin — the reason that upstream node is drawn. Evidence A — Human trial evidence.
The transcription factor that commands the body's own antioxidant and detoxification arsenal. Evidence A — Human trial evidence.
Mitochondrial energy (ATP) output. Evidence A — Human trial evidence.
The hypothalamic–pituitary–adrenal axis and its hormone cortisol — the body's central stress-and-recovery command. Evidence A — Human trial evidence.
Evidence on these pathways
HPA Axis / Cortisol → Cognition. “Whereas treatments used in previous studies generally affect more than one memory phase and therefore cannot detect possible differential effects of glucocorticoids on the distinct phases of acquisition, consolidation and retrieval, here we show that treatment of healthy humans with cortisone at acute-stress levels specifically impaired retrieval of declarative long-term memory for a word list.” — Acute cortisone administration impairs retrieval of long-term declarative memory in humans. Nature Neuroscience, 2000, vol 3, pp 313-314. doi:10.1038/73873
HPA Axis / Cortisol → Digestive Function. “Reports have consistently established that central administration of CRF acts in the brain to inhibit gastric emptying while stimulating colonic motor function through modulation of the vagal and sacral parasympathetic outflow in rodents.” — Corticotropin-Releasing Factor and the Brain-Gut Motor Response to Stress. Canadian Journal of Gastroenterology, 1999, vol 13, pp 18A-25A. doi:10.1155/1999/375916
HPA Axis / Cortisol → Prolactin. “Stress is also an important physiologic cause of hyperprolactinemia, and its clinical significance is still being explored.” — Stress-Induced Hyperprolactinemia: Pathophysiology and Clinical Approach. Obstetrics and Gynecology International, 2018, volume 2018, article ID 9253083. doi:10.1155/2018/9253083
HPA Axis / Cortisol → Muscle Recovery. “Glucocorticoids elicit the atrophy of muscle by increasing the rate of protein degradation by the ubiquitin-proteasome system and autophagy lysosome system.” — The Regulation of Muscle Mass by Endogenous Glucocorticoids. Frontiers in Physiology, 2015, 6, article 12. doi:10.3389/fphys.2015.00012
Formulas that act on these pathways
Acts on 5 of these pathways: Male Fertility, Total Testosterone, HPG Axis, Nrf2, HPA Axis / Cortisol.
Acts on 4 of these pathways: Total Testosterone, HPG Axis, Nrf2, HPA Axis / Cortisol.
Acts on 4 of these pathways: Total Testosterone, HPG Axis, Nrf2, HPA Axis / Cortisol.
Acts on 4 of these pathways: Total Testosterone, HPG Axis, GnRH, Nrf2.
Acts on 3 of these pathways: Total Testosterone, Nrf2, HPA Axis / Cortisol.
Acts on 3 of these pathways: Total Testosterone, HPG Axis, HPA Axis / Cortisol.
What this page does not claim
This page names the pathways involved and the published evidence on each. It does not claim that any formula treats, cures or prevents Male Fertility & Sperm Health. A pathway opens here only on graded, published evidence, under a standard fixed before the evidence was gathered, and every figure above carries its grade.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.