2 citations
,
November 2017 in “Histochemistry and Cell Biology” This study observed varying levels of polyamines in different compartments of rat hair follicles, indicating their potential involvement in hair growth, especially in the matrix and inner root sheath layers.
2 citations
,
May 2006 in “Journal of Separation Science” This study describes a capillary GC method for accurately measuring spermidine levels in hair lotions, confirming its precision and specificity for this application.
1 citations
,
January 2020 in “Recent Research in Genetics and Genomics/Recent Research in Genetics and Genomics ” In this study, high doses of Lepidium sativum seeds extract were reported to cause toxicity and tissue damage in animals, suggesting the need for careful use under medical supervision.
1 citations
,
May 2024 in “The Journal of Sexual Medicine” This case report suggests that clomiphene citrate can effectively restore fertility in some men with a long history of anabolic steroid abuse, though individual responses to treatment vary.
1 citations
,
January 2002 in “Yaoxue jinzhan” This study found that Epristeride and Finasteride reduced prostate development and testis weight in male rats, but only Finasteride appeared to impact reproductive function.
1 citations
,
December 2011 in “EFSA Journal” This opinion from the EFSA Panel concludes that the health claim regarding spermidine prolonging the anagen phase of the hair cycle does not meet regulatory criteria as it is related to disease treatment.
February 2026 in “Molecular Imaging and Radionuclide Therapy” In this study, male patients treated with 150 mCi of radioactive iodine showed no negative impact on fertility, but long-term studies with larger groups are needed to further assess hormonal effects and sperm health after this treatment.
May 2025 in “Gynecological Endocrinology” This study observed that men with a family history of PCOS had lower median sperm concentration and higher rates of alopecia and gynecomastia compared to those without such a family history.
June 2022 in “Journal of Experimental Biology and Agricultural Sciences” This study found that steroid hormones influence the quality indicators of fresh and cryopreserved stallion sperm, with testosterone negatively correlated with motility and estradiol positively correlated with survival rate.
October 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” This study found that a mild intramuscular dose of BOTOX increased spermatogenesis and improved sperm quality in ageing mice, suggesting potential benefits for managing male infertility.
April 2021 in “Animal Bioscience” This study found that 5-aminolevulinic acid significantly improved chicken sperm motility and increased mitochondrial membrane depolarization, while decreasing ATP levels.
January 2020 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” This review reports an increasing trend in sperm DNA fragmentation research over the past 20 years, with a focus on lifestyle, asthenozoospermia, and varicocele, and highlights the TUNEL technique as widely used.
October 1988 in “Pediatric research” In this study, researchers observed that the sequence of maturity markers in normal boys showed specific time lags, with some markers appearing before and others after spermarche.
January 2024 in “Journal of Applied Health Sciences and Medicine” In this study, Nephrolepis biserrata extract significantly improved fertility indices in male Wistar rats with testosterone propionate-induced benign prostatic hyperplasia, showing increased sperm count and reduced prostate weight, suggesting potential pro-fertility benefits for BPH-related infertility.
In this study, three cases of young men using finasteride for five years showed altered sperm morphology and motility issues, with partial improvement observed after discontinuation.
April 2026 in “ACS Applied Materials & Interfaces” In this study, Sper-12/siRNA nanoparticles effectively suppressed abnormal AR protein levels, promoted hair follicle proliferation, and alleviated hair loss symptoms in androgenetic alopecia model mice, providing a promising delivery platform for siRNA-based therapeutics.
October 2025 in “Physiologia” In this exploratory in vitro study, treatment with spermidine increased cell viability and altered gene expression in human epidermal keratinocytes, suggesting potential benefits to cellular health and function, though effects on mitochondrial markers were not significant.
January 2025 in “MEDS Public Health and Preventive Medicine” In this study, oral spermidine supplementation was found to significantly prolong the hair follicle anagen phase and reduce hair loss, with effects persisting three months after treatment in healthy participants, suggesting potential therapeutic benefits for hair loss conditions.
July 2012 in “EFSA supporting publications” This technical report from the European Food Safety Authority responds to comments on its previous scientific opinion regarding a health claim about spermidine and hair growth, reporting no new experimental results.
June 2011 in “Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)” The researchers reported that both estrogen receptors ERα and ERβ are expressed in human testis, and identified two novel genes, Aven and Regucalcin, linked to estrogen and androgen regulation, which may be crucial for spermatogenesis.
This study found that finasteride treatment in adult hamsters led to significant testicular alterations and reduced spermatogenesis compared to untreated controls.
July 2007 in “Journal of Reproduction & Infertility” This study found that in male rats, finasteride significantly decreased spermatogonia and primary spermatocytes numbers and increased Leydig cells, but did not affect overall testis histology or spermatogenesis.
October 2020 in “Journal of Pakistan Association of Dermatology” This analysis of seven studies explored the impact of finasteride (1mg/day for androgenic alopecia) on sperm concentration, finding that in most studies, sperm concentration increased after stopping treatment, but the largest study showed no change during or after treatment.
August 2020 in “DOAJ (DOAJ: Directory of Open Access Journals)” This study found that Finasteride at doses of 5 mg or higher may reduce the expression of key spermatogenesis biomarkers, potentially impacting male fertility in mice.
120 citations
,
October 2007 in “Clinical Interventions in Aging” This review discusses the effects of estrogens on skin aging and highlights the potential benefits of estrogen replacement therapy and selective estrogen receptor modulators for improving skin health in postmenopausal women, but reports no new clinical findings.
90 citations
,
July 2009 in “PTR. Phytotherapy research/Phytotherapy research” In this study, spearmint tea significantly reduced testosterone levels and improved self-reported hirsutism in women with PCOS, but did not change objective hair growth scores over the short trial period.
January 2017 in “CommonKnowledge Research Repository (Pacific University Oregon)” This review suggests spearmint tea may lower androgenic hormones in women with hirsutism and related symptoms, though longer treatment and follow-up may be needed for noticeable improvements.
19 citations
,
March 2016 in “Frontiers in Plant Science” This study identified that spermidine-mediated activation of eIF5A by hypusination plays a significant role in Arabidopsis thaliana growth, flowering time, stress adaptation, and development, including changing root and aerial architecture.
14 citations
,
March 2020 in “Cold Spring Harbor Perspectives in Biology” This review discusses the flexibility and diversity of tissue stem cell systems, particularly focusing on the motility and ligand distribution of spermatogenic stem cells, without presenting new experimental results.
1 citations
,
January 2018 in “PubMed” This study in Tehran found that, after adjusting for confounders, women with PCOS had no different risk of non-pregnancy after assisted reproductive treatment compared to women without PCOS.