Browse by Health Condition 13 conditions

One of the largest topics in the library: the modifiable factors behind male fertility and sperm quality.

114 human studies · newest 2026

• Lifestyle factors and prevalence of semen abnormalities among men undergoing infertility evaluation at oak specialist hospital: A retrospective cohort study.
• Ozone exposure and semen quality in low-income men with unhealthy behaviours in Foshan, China: a case-control study.
• Occupational Heat Exposure and Fertility Stress as Independent Factors of Low Semen Quality: A Multidimensional Analysis.

Studies on low testosterone, what drives it, when it is real versus a measurement artifact, and what lifts it naturally.

85 human studies · newest 2026

• Endothelial Sirtuins and Mitochondrial Function Are Associated With Testosterone Status: Implications for Accelerated Vascular Aging in Middle-Age and Older Men With Low Testosterone.
• Cross-Sectional Association of Time Spent Outdoors With Serum Testosterone: Results From the National Health and Nutrition Examination Survey.
• Vitamin D Adequacy Conditions the Prolactin-Suppressive Effect of Metformin in Men Receiving Prolactin-Elevating Medications.

Research on sleep loss and disruption in men, and what it costs hormones, recovery, and metabolism.

30 human studies · newest 2026

• Effects of unsupervised campus HIIT on fitness and sleep in sedentary male students: a randomized controlled trial.
• Lower fat-free mass is independently linked to restless legs syndrome in men: a cross-sectional PSG-BIA study.
• Acute impairments in glucose tolerance following one night of partial sleep restriction are not rescued by moderate-intensity walking in young men.

The research on excess weight in men and its reach into hormones, fertility, and metabolic health.

29 human studies · newest 2026

• Effect of Different Modes of High Intensity Interval Training on Appetite-Related Hormones, Appetite Perception, and Anthropometric Measures in Overweight and Obese Men: A Randomized Controlled Trial.
• Scaled Testosterone: A Novel Metric to Calibrate Serum Testosterone and SHBG in Men
• Dietary Protein Reduction During Isocaloric Conditions Reduces Body Weight in Men With Overweight or Obesity.

Peer-reviewed research concerning heat stress, summarized and appraised in plain language with every source cited.

25 human studies · newest 2023

• An Assessment of Men Semen Alterations in SARS-CoV-2: Is Fever the Principal Concern?
• The Impact of High Ambient Temperature on Human Sperm Parameters: A Meta-Analysis.
• Heat acclimation-induced intracellular HSP70 in humans: a meta-analysis.

Research on chronic inflammation and oxidative stress in men, and the diet and activity that calm them.

26 human studies · newest 2026

• Dietary Inflammatory Index and Blood Inflammatory Markers in Young Men with Different Levels of Physical Activity: A Cross-Sectional Observational Study.
• Endothelial Sirtuins and Mitochondrial Function Are Associated With Testosterone Status: Implications for Accelerated Vascular Aging in Middle-Age and Older Men With Low Testosterone.
• Nutritional modulation of male fertility: a molecular-focused scoping review.

Research on the changes that come with age in men, and the habits that slow them.

23 human studies · newest 2026

• Lifetime Endurance Physical Activity Is Related to Better Cardiometabolic Profile but May Be Insufficient to Preserve Muscle Strength and Power in Middle Aged and Older Men.
• Endothelial Sirtuins and Mitochondrial Function Are Associated With Testosterone Status: Implications for Accelerated Vascular Aging in Middle-Age and Older Men With Low Testosterone.
• Moderate Wine Consumption, Defined by the Mediterranean Diet, Is Associated With Delayed Biological Aging in Men From the Moli-sani Study.

Studies on recovering from hard training, soreness, muscle damage, and the tools and nutrients that speed it.

15 human studies · newest 2026

• Acute metabolic and molecular responses to sprint interval versus moderate-intensity continuous exercise in healthy young men.
• Effect of acute exercise on the dynamics of testosterone levels: a systematic review of randomized controlled trials.
• Acute Effect of Percussive Massage on Cross-Section Area, Muscle Strength, and Late Muscle Pain of the Quadriceps Muscle Following a Fatigue Protocol in Physically Active Men: Randomized Clinical Trial.

Early research on focus, memory, and mental sharpness in men. A growing area we are actively building out.

10 human studies · newest 2026

• Associations of Obesity, Inflammatory Indicators, and Serum Testosterone in Adult Males: A Cross-Sectional Study Based on NHANES 2011-2016 and 2021-2023.
• Prevalence and long-term outcomes of brain fog and cognitive impairment in individuals with long COVID: A systematic review.
• Pre-Exercise Hydration Modulates the Sweat Rate and Executive Control during Moderate Exercise to 3% Dehydration under Thermoneutral Conditions.

Studies touching on tiredness and low energy, and the exercise and nutrient factors linked to them.

6 human studies · newest 2026

• Late-onset and functional hypogonadism in aging men: an integrated perspective on hormonal, sleep, and metabolic dimensions.
• Testosterone Therapy in Men in Their 40s: A Narrative Review of Indications, Outcomes, and Mid-Term Safety.
• Exploring the efficacy and safety of a novel standardized ashwagandha (Withania somnifera) root extract (Witholytin®) in adults experiencing high stress and fatigue in a randomized, double-blind, placebo-controlled trial.

A watch-list topic: research on lingering post-viral effects on male health. Coverage is early and growing.

3 human studies · newest 2026

• Prevalence and long-term outcomes of brain fog and cognitive impairment in individuals with long COVID: A systematic review.
• Ambient climatic conditions and semen quality: a comparative analysis across the periods before, during, and after the COVID-19 pandemic.
• An Assessment of Men Semen Alterations in SARS-CoV-2: Is Fever the Principal Concern?

Peer-reviewed research concerning testicular tumors, summarized and appraised in plain language with every source cited.

1 human study · newest 2023

• Lifestyle-, environmental-, and additional health factors associated with an increased sperm DNA fragmentation: a systematic review and meta-analysis.

Peer-reviewed research concerning varicocele, summarized and appraised in plain language with every source cited.

1 human study · newest 2023

• Lifestyle-, environmental-, and additional health factors associated with an increased sperm DNA fragmentation: a systematic review and meta-analysis.