Posts tagged cognitive focus | XY Files – Veedma's evidence-based men's health articles

Glycine for sleep and performance: The amino acid you might be missing

Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist

Dec 09, 2025 · 10 min read

It is not just for building muscle. This simple amino acid cools the body, calms the mind, and might be the missing link in your deep sleep architecture. “We often look for complex pharmaceutical solutions for sleep, but sometimes the answer is basic biology. Glycine helps the body lower its core temperature—a non-negotiable physiological trigger ...

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

Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate

Dec 05, 2025 · 13 min read

Chronic stress can quietly push testosterone down and make it harder for your body to recover, focus, and stay lean. Here is how stress and testosterone interact, what symptoms to watch for, and what actually helps break the cycle. “Stress and testosterone talk to each other all day long. Short bursts of stress are usually ...

Semen retention meaning and the science behind the hype

Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate

Dec 05, 2025 · 12 min read

Many men search for the true semen retention meaning hoping for higher testosterone, sharper focus, and better sex. Here is what the science actually shows about holding your semen, your hormones, and your long‑term health. “Your body is not a battery that ‘charges up’ testosterone by holding semen. Sperm and testosterone are related but separate ...

Optimal vs normal: why “in range” blood tests can still miss what your body needs

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 29, 2025 · 13 min read

Many men are told their blood work is “normal” even though they feel tired, softer, and off their game. Understanding optimal vs normal lab ranges can turn a frustrating dead end into a clear plan to feel and perform better. “When a lab report says ‘normal’, it mostly means you’re not in immediate danger. It ...

Nad+ side effects: what science really says about safety, injections, and anti-aging hype

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 29, 2025 · 13 min read

NAD injections are marketed as a shortcut to better energy, sharper focus, and longer life. The science is promising but early, and there are real limits, costs, and side effects you should understand before you sign up for NAD shots. “NAD+ is central to how your cells make energy and repair damage, so it makes ...