Posts by Jonathan Pierce, PhD: Clinical psychologist & Neuroscience specialist | XY Files – Veedma's evidence-based men's health articles

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

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 ...

Why do i get so hot when i sleep: The science of night sweats and overheating

Jonathan Pierce, PhD: Clinical psychologist & Neuroscience specialist

Dec 05, 2025 · 14 min read

If you keep Googling “why do i get so hot when i sleep” even though your bedroom feels cool, you are not imagining it. Your brain, hormones, muscles, and bedroom setup all play a role — and most of them are fixable. “When men ask me ‘why do i get hot when i sleep?’ I ...

The science of food noise and how to turn down the volume

Jonathan Pierce, PhD: Clinical psychologist & Neuroscience specialist

Dec 03, 2025 · 16 min read

If your brain never shuts up about food, it is not a character flaw. It is a brain–body signal problem that you can dial down with the right mix of habits, hormones and, when needed, medication. “When a man tells me he wakes up thinking about food and goes to bed planning his next snack, ...

Andrew Huberman sleep cocktail: what it is, what works, and what to skip

Jonathan Pierce, PhD: Clinical psychologist & Neuroscience specialist

Nov 26, 2025 · 14 min read

The Andrew Huberman sleep cocktail has gone viral as a “science-based” way to fall asleep faster. Here is what each ingredient really does, what the research shows, and how to use it safely—if at all. “The Huberman sleep cocktail is basically a curated mix of familiar supplements. One or two of them can modestly help ...

Low libido: when the brain is the issue

Jonathan Pierce, PhD: Clinical psychologist & Neuroscience specialist

Oct 19, 2025 · 15 min read

Low libido in men is rarely just a testosterone issue. Here is how the brain, hormones, mood, and everyday habits interact to shape sex drive, and what actually helps when it stays low. “Desire starts in the brain. Testosterone is the fuel, but chemicals like dopamine and norepinephrine decide how much you care about sex ...