XY Files Blog

Medically reviewed articles on testosterone, hormones, fitness, and longevity, so you can make informed decisions about your health.

Dry skin on penis or eczema on the pennis? Causes, symptoms, and fixes

Veedma's editorial team: Evidence-based men's health

Dec 02, 2025 · 14 min read

Most cases of dry, flaky, or itchy penile skin are irritant contact dermatitis from barrier breakdown in the penis’ thin stratum corneum (often triggered by friction, sweat, soaps, detergents, or condoms), not an STI. Here’s how to tell simple irritation from eczema, psoriasis, yeast, or balanitis. Here is what actually helps the skin heal. “Most ...

Hot flush in males: Causes, symptoms, and treatments that actually help

Veedma's editorial team: Evidence-based men's health

Dec 01, 2025 · 14 min read

A hot flush in males is most often triggered by a meaningful drop in testosterone that disrupts the brain’s temperature control. The good news is that male hot flashes are common, measurable, and usually treatable once you identify the driver. “When a guy tells me he’s getting sudden heat waves and drenching sweat, I think ...

Why no morning wood happens and what it reveals about your vascular health

Veedma's editorial team: Evidence-based men's health

Dec 01, 2025 · 14 min read

Losing morning erections for many weeks often means nocturnal penile tumescence is being blunted by reduced penile blood flow, impaired nerve signaling, or poor sleep. This can flag vascular problems even when testosterone is normal. Here’s how to interpret the change and when it should prompt a closer look at diabetes and cardiovascular risk. “Morning ...

How quickly does a b12 shot work? A realistic timeline for men

Veedma's editorial team: Evidence-based men's health

Dec 01, 2025 · 15 min read

Vitamin B12 blood levels typically rise within hours to 24 hours after an injection. If symptoms improve, it often occurs over days to weeks, depending on how severe the deficiency is and what is causing your symptoms. If you are not truly B12 deficient or you have another root cause of fatigue, the “boost” may ...

How much does the bar weight bench press: A complete guide to lifting standards

Veedma's editorial team: Evidence-based men's health

Nov 30, 2025 · 15 min read

How much does a bench press bar weigh? A complete guide to barbell standards A standard Olympic barbell used for the bench press weighs 45 lb (20 kg) before you add any plates. From there, your “real” bench number is the total loaded weight, and a common general-fitness target is about a 1:1 bench-to-bodyweight ratio ...

Novak Djokovic proactive care performance: The science of defying age

Veedma's editorial team: Evidence-based men's health

Nov 30, 2025 · 16 min read

Elite performance in your late 30s is achievable when you proactively manage the predictable physiology of aging. You can counter testosterone’s roughly 1 to 2 percent yearly decline after 30, VO₂ max’s roughly 10 percent per-decade drop, and up to roughly 8 percent per-decade muscle loss with consistent training, strength work, and recovery before injuries ...

Can you drink coffee while fasting? What black coffee really does to a fast

Veedma's editorial team: Evidence-based men's health

Nov 30, 2025 · 10 min read

Black coffee does not break a metabolic fast for most men because an 8 ounce cup has about 3 calories and is unlikely to trigger a meaningful insulin response. The real risk comes from what you add to it, plus how caffeine affects hunger, blood sugar, cortisol, and your gut when your stomach is empty. ...

Does diet coke break a fast? What men should know about diet soda, insulin, and hunger

Veedma's editorial team: Evidence-based men's health

Nov 29, 2025 · 15 min read

Diet Coke and other diet sodas contain essentially no calories, so they technically do not break a fast. In some men, the sweet taste or caffeine may affect hunger, insulin, or stress responses enough to make fasting feel less effective. “If a guy asks me, ‘does diet coke break a fast,’ my medical answer is: ...

NAD+ injections safety and benefits for men. What to know about NAD3 side effects

Veedma's editorial team: Evidence-based men's health

Nov 29, 2025 · 14 min read

NAD+ injections can be a safe way for men to raise NAD availability when they are prescribed, sourced well, and dosed correctly, but the benefits are still emerging and side effects are real. If you are seeing “NAD3” online, focus less on the label and more on the exact active ingredient, concentration, route, excipients, and ...

Bioidentical hormone replacement therapy for men: Science, safety, and real-world results

Veedma's editorial team: Evidence-based men's health

Nov 28, 2025 · 15 min read

Most prescription testosterone replacement used in men is already “bioidentical.” The hormone molecule is chemically identical to what the testes produce, even as levels commonly decline about 1% per year after age 30 to 40. The real question is whether you have symptomatic, consistently low testosterone and how to dose and monitor therapy to restore ...

Propel sports drink review: What the research says

Veedma's editorial team: Evidence-based men's health

Nov 28, 2025 · 10 min read

Propel is usually a reasonable low calorie hydration option for workouts under about 60 to 90 minutes, with 0 calories, 0 g sugar, and about 270 mg sodium per 20 ounce bottle, but it does not provide the carbohydrate needed for prolonged endurance exercise or prevent a Super Bowl hangover. This February 2026 review of ...

Protein gummies: Smart shortcut or sugary trap for your gains?

Veedma's editorial team: Evidence-based men's health

Nov 28, 2025 · 15 min read

Protein gummies can be a smart shortcut for your gains if they help you hit your daily protein target with predictable dosing. They can also be a sugary trap if you treat them like candy, overshoot calories, or let them replace real meals. “For most guys, the muscle building ‘magic’ is not the form of ...