This is Ben Greenfield. How old would you guess he is?

Biologically, his age is 20.

His biological age has been measured by the length of the telomeres at the end of his DNA strands. And this is just the tip of the nerdy-science-talk iceberg.

Ben looks, feels, and performs exactly like a 20-year-old. He was voted the #1 Personal Trainer in the Nation in 2008, and when he's not training others, he's busy running a Spartan Race or crashing an Ironman.

But guess what? His chronological age is actually 37.

Ben Greenfield has spent an intense amount of time "in the trenches," experimenting with everything from drinking crushed ants to injecting stem cells into certain parts of his body.

In this groundbreaking biohacking guide, Ben marries this firsthand experience with ancestral wisdom and modern science to share with people of the world how they, too, can live long, truly limitless lives. He is a living testimonial of what he teaches and, thus, has become one of the most influential health coaches and biohackers in the world today.

Due to Ben's breakthrough and extensive research, his content is packed with stuff that you aren't likely to hear about in biohacking podcast because here's the thing — Ben takes it further than just biohacking.

Biohacking implies affecting the biology of your physical body. However, biological age and longevity aren't just measures of a well cared for physical body; they are a product of your system as a whole — the health of your mind, body, and, yes, even spirit.

This is precisely in this book, Ben Greenfield broke down his 24 "tips from the trenches" talk into three different sections — mind, body, and spirit.

Here's the ultimate biohacking guide based on the brilliant work of Ben Greenfield and his captivating idias in this book.