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About us

Buck, Daiva, Lukas, and Ema

Hi, My name is Buck Rizvi.

My wife, Daiva (a Certified Holistic Nutritionist), and I founded Ultimate Lifespan in 2005 with the mission to help people to live happy, healthy lives by healing and balancing their digestive tract (aka gut).

Buck Before

My Story:

Before founding Ultimate Lifespan, my health was a train wreck.

At 5’10” and 236 pounds, I was clinically obese. I had a painful skin rash on my legs, frequent headaches, and debilitating heartburn/indigestion that would keep me up into the wee hours.

On top of all this, my cholesterol levels and blood pressure were through the roof!

At 40, I was a ticking time bomb, squarely on the road to autoimmune and cardiovascular disease.

As a family man with four kids, I finally said “enough is enough!” and began a journey to heal myself.

After extensive research and consulting with health practitioners across the spectrum, I discovered the REAL reason for my health issues:

I needed to HEAL MY GUT!

It turns out that years of eating a typical American diet, taking over-the-counter pain medications and antibiotics had damaged and inflamed my digestive tract to the point where:

Buck After

I had all the symptoms of intestinal hyperpermeability, also known as “leaky gut,” and mainstream medicine wasn't helping me address the root cause.

Based on my research, I decided to turn to the healing wisdom of natural botanicals and microorganisms used for centuries to soothe and heal the digestive tract.

This modern take on ancient wisdom, combined with a few lifestyle changes, completely turned my life around.

Within six months, I lost 50 pounds. My blood pressure was in the normal range. My head was clear and focused. And I was sleeping like a baby at night.

My gut was finally in balance!

My personal success inspired me to develop, in collaboration with a team of natural health practitioners and formulators, the Ultimate Digestive Health 30-Day System.

And it’s my mission to share this, through Ultimate Lifespan, and help others enjoy the pure joy and happiness that comes with a healthy gut.

Medical Doctor and Holistic Nutritionist approved, the Ultimate Digestive Health 30-Day System has helped over 54,000 people worldwide in their own journey to a healthy, happy gut.

Thanks for allowing me to share my story.

I would be honored to be your guide in this journey of discovery, real health, and lasting happiness.

Buck Rizvi

Disclaimer: Results are not typical and can vary. There is no guarantee of specific results.