Episode 12: Do caffeine free energy drinks work without a crash?
March 24, 2026 · 10:07
Caffeine-free energy drinks can steady focus without a crash by addressing hydration, electrolytes, and B‑vitamins.
Cognitive focus
Explore strategies, supplements, and lifestyle factors that enhance mental clarity, concentration, and cognitive performance. Learn how optimizing brain function supports better training, productivity, and overall men's health.
Most-read topics as podcast episodes
We only record episodes on the topics readers care about most.
Start here
The essentials for cognitive focus — then explore the latest posts below.
The science of caffeine free energy drinks: How to boost focus without the crash
Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist
Jan 10, 2026 · 12 min read
Non-caffeinated energy boosters, including caffeine-free energy drinks, may help support focus without a “crash,” largely by addressing fundamentals that influence energy and performance, such as hydration, electrolyte balance, and nutrient cofactors involved in energy metabolism. A “crash” is the rebound in sleepiness, brain fog, and low drive you feel when a stimulant wears off while ...
Does stress cause low testosterone in men? What science really shows
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 ...
Semen retention meaning and the science behind the hype
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 05, 2025 · 13 min read
Semen retention is deliberately avoiding ejaculation for a period of time. Research suggests it does not produce a sustained testosterone boost. A 2001 study in World Journal of Urology found a modest rise around day 7 of abstinence that drifted back toward baseline despite continued retention. Here’s what the evidence says about how “holding semen” ...
Normal lab range vs optimal: What science shows for men
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Nov 29, 2025 · 15 min read
A “normal” lab range is a population-based reference interval (often the middle 95%); “optimal” is the range that best aligns with your symptoms, function, and risk profile. 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 ...