Blood test interpretation

Learn how to read and understand your blood work results, from hormone panels to metabolic markers. Knowing what your numbers mean empowers you to make informed decisions about your health, TRT protocols, and overall optimization.

BMI normal band for men (18.5–24.9): What science shows

BMI normal band for men (18.5–24.9): What science shows

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Dec 07, 2025 · 14 min read

A “normal” BMI is 18.5 to 24.9 kg/m². It is a population screening tool and does not directly measure body fat, muscle mass, or visceral fat, so use it as a starting point. Pair BMI with waist circumference, body composition, and a few core metabolic labs to decide what to change and what to track. ...

Can low testosterone cause joint pain?

Can low testosterone cause joint pain?

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Dec 06, 2025 · 15 min read

Low testosterone can contribute to joint pain by increasing chronic inflammation and weakening the muscle, bone, and cartilage support that stabilizes joints. A 2025 longitudinal cohort study in BMC Musculoskeletal Disorders reported that men with low testosterone had about double the risk of developing osteoarthritis. [4] If aching knees or stiff shoulders come with fatigue, ...

Healthy suppositories for men: What works, what is safe, and what to avoid

Healthy suppositories for men: What works, what is safe, and what to avoid

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 05, 2025 · 12 min read

Healthy suppositories for men are clinician recommended rectal or urethral inserts that treat a specific diagnosis with a known medication, dose, and safety profile. This guide breaks down which suppositories are evidence based, what “natural” options really mean, and how to use them safely without missing more serious problems. “A suppository is just a delivery ...

Does stress cause low testosterone in men? What science really shows

Does stress cause low testosterone in men? What science really shows

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 05, 2025 · 14 min read

Chronic psychological stress is linked to lower morning testosterone in men, largely because sustained HPA axis cortisol output can suppress hypothalamic-pituitary-gonadal (GnRH/LH) signaling and reduce testicular testosterone production. Here is how to recognize the stress-low T feedback loop and what actually helps break it. “Stress and testosterone talk to each other all day long. Short ...

Which essential biomarkers runners should track? The lab numbers that predict fatigue and low testosterone

Which essential biomarkers runners should track? The lab numbers that predict fatigue and low testosterone

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Dec 04, 2025 · 15 min read

The essential biomarkers runners should track include vitamin D, iron and ferritin, magnesium and potassium, C reactive protein, testosterone, cortisol, blood glucose, and performance markers like VO2 max, lactate threshold, and resting heart rate. When those numbers drift, your training can feel harder, recovery slows, and injury risk rises even if your mileage looks “perfect.” ...

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