
The Hardness Factor: How to Achieve Your Best Health and Sexual Fitness at Any Age
by Steven Lamm
4.2 stars from 152 reviews
Last checked: Apr 28, 2026
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Fans of these authors will like this...
- Mark Hyman
- David Perlmutter
Fans of these books will like this...
- Why Men Die First
- The Inflammation Syndrome
Perfect for you if...
- You're a man concerned about sexual performance and want practical, medical advice rather than marketing hype about supplements.
- You're interested in the connection between cardiovascular health and sexual function, and want evidence-based nutrition and exercise protocols.
- You like straightforward health books that treat you like an adult and include actionable meal plans from a professional chef.
Maybe not for you if...
- You're looking for philosophical or emotional explorations of masculinity or intimacy.
- You prefer fiction or narrative-driven books to prescriptive health regimens.
- You're uncomfortable with the explicit focus on erectile function as a health metric.
About this book
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Price History
Kindle price over time. Green zones = periods when the book was free.
Price has dropped 10 times in the last 17 months. Goes on sale roughly every 48 days.
Sales Rank
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Sales rank has improved by 24% recently. This book is climbing the charts and gaining momentum.
Rating & Reviews
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Currently 4.2★ from 152 reviews
Review activity has been quiet recently. Rating has remained stable at 4.2 over the tracking period.
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Actual Predicted
This book is currently discounted at $2.99. It typically returns to around $15.19.
Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.
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