Amino acid supplements

Explore the role of amino acid supplements like BCAAs and EAAs in supporting muscle recovery, protein synthesis, and overall performance. Learn which amino acids matter most for men looking to optimize their training results and health.

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The essentials for amino acid supplements — then explore the latest posts below.

Does creatine increase testosterone? The science on muscle fuel and male hormones

Does creatine increase testosterone? The science on muscle fuel and male hormones

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Jan 11, 2026 · 11 min read

Creatine monohydrate does not significantly increase total or free testosterone in healthy men in controlled studies, because it works by boosting cellular energy (ATP recycling) rather than directly stimulating the endocrine system. It may still help you train harder and see temporary workout-related hormone spikes. A single 2009 rugby study reporting higher DHT (a potent ...

Does creatine cause erectile dysfunction? What the evidence says for men

Does creatine cause erectile dysfunction? What the evidence says for men

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Jan 01, 2026 · 10 min read

No, creatine does not cause erectile dysfunction in men based on the current clinical evidence. The more important story is why the rumor started, what actually drives ED, and how to use creatine safely while protecting sexual performance. “When men ask me, ‘does creatine cause erectile dysfunction,’ my answer is no. In the medical literature ...

Creatine weight gain: What’s normal, what’s not, and how to stay in control

Creatine weight gain: What’s normal, what’s not, and how to stay in control

Dr. Bruno Rodriguez, DPT, CSCS avatar
Dr. Bruno Rodriguez, DPT, CSCS: Strength, Recovery, and Physical Therapy Expert
Dec 11, 2025 · 11 min read

Creatine commonly increases scale weight by about 2 to 4.5 lb in the first week, mostly from an increase in total body water as creatine stores rise (especially with a loading phase). Learn how to tell normal water shifts from true fat gain and how to track performance and body composition so weigh-ins don’t catch ...

Does glycine help you sleep better? What studies show about core temperature and next day fatigue

Does glycine help you sleep better? What studies show about core temperature and next day fatigue

Dr. Jonathan Pierce, PhD avatar
Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist
Dec 09, 2025 · 11 min read

Yes. Human research suggests that taking 3 grams of glycine about 1 hour before bed can improve subjective sleep quality and next day fatigue, potentially because glycine lowers core body temperature during sleep. If you are a man who runs “hot” at night, wakes up unrefreshed, or feels flat the next day, glycine is a ...

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

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

Dr. Jonathan Pierce, PhD avatar
Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist
Nov 26, 2025 · 15 min read

The Huberman sleep cocktail is a sleep supplement stack that typically includes magnesium, L-theanine, and apigenin, sometimes with inositol. Evidence is strongest for magnesium and L-theanine, while apigenin and low-dose inositol have limited direct sleep data. Here is what each ingredient does, what research supports, and how to use it safely. “The Huberman sleep cocktail ...

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