The Unfiltered Guide to Male Fertility and Performance

LOAD 101

Sleep Like It’s Your Superpower

The world's first sperm tracker

YOU'RE COOKED

Featured

FIRST 500

For most men, sperm is either a punchline or something you wipe up and forget. Which is wild, because it’s one of the most information-dense signals your body produces. It’s not...

Featured

YOUR FIRST 7 DAYS

Most men download a health app and immediately try to become David Goggins. Then they miss two days and vanish forever.

A person leaning against a kitchen counter with an unlabelled glass vial and a glass of water on the counter beside them.

Fertility

The Effects of Anabolic Steroid Use on Male Fertility

Anabolic steroids can help muscle grow. They also act like testosterone in the body. This can switch off key signals from the brain.

Illustration of a man in cycling clothing sitting on a concrete step beside a road bike, drinking from a water bottle in cool evening light with warm amber from a window.

Fertility

Does cycling affect your sperm?

Most men fear a bike saddle will make them infertile. That worry is overblown. Cycling can affect your sperm, but the real issue is shape, not count. You need serious weekly...

Illustration of a man closing his apartment window against a smog-covered city skyline at dusk, with an air purifier glowing beside him

Fertility

How air pollution may affect semen quality

Several studies link air pollution to lower semen quality. A 2023 meta-analysis pooled results from several studies on air pollution. It found that exposure to ambient air...

A man sitting at a kitchen table looking at his phone, with a cigarette pack and ashtray nearby, warm morning light falling across the table.

Fertility

How smoking affects sperm count, motility, and DNA

Cigarette smoke can harm your sperm count, how well they move, and their DNA. About 37% of men of reproductive age smoke worldwide . Europe has the highest tobacco use of any...