Our Story

LongevityON is more than just a brand; it’s a testament to the indomitable spirit of Sergei Onishenko. Born and raised in a small Ukrainian village, Sergei’s life was anything but ordinary. Faced with severe health challenges, he spent a terrifying month in a coma, and had to face life threatening challenges in his recent years, teetering on the edge of life and death. But it was this very experience that sparked a fire within him—a fierce determination to not only survive but to help others thrive. 

At the tender age of 8, Sergei was personally chosen by the Communist government to join an elite state-run program. He excelled in both Greco-Roman wrestling and Olympic canoeing, achieving national recognition. By the age of 19, his extraordinary physical and mental endurance led him to be selected as both a player and the strength and conditioning coach for Ukraine’s first American football team.


From a young age, Sergei noticed something unsettling: people around him seemed to fall ill frequently and age before their time. This haunting observation planted a seed of curiosity and compassion deep within him. It wasn’t just about living longer; it was about living better. When Sergei made his way to the United States, this passion evolved into a thriving career. As a trainer and wellness specialist, he’s been a beacon of inspiration to VIP executives, elite athletes, and high-profile entertainers, helping them unlock their full potential. 

This relentless drive led Sergei to found LongevityON, where the worlds of wellness, fitness, nutrition, and science collide to create something truly extraordinary. Sergei’s story is one of resilience, determination, and an unwavering commitment to human potential. Through LongevityON, he continues to channel that passion, offering others the tools to not only survive but to thrive in the face of adversity.

Together with a renowned PhD Nutritionist and Integrative Medicine expert, Sergei developed Peak VitalityON. This revolutionary formula is a powerhouse blend of plant-based protein, antioxidants, essential minerals, and age-defying compounds. It’s designed to supercharge your cells, boost your energy, and help you fight the effects of aging—all in one scoop.

Get in touch! We would love to hear from you.

  • How to Lower Your Biological Age: Longevity Biomarkers Explained

    How to Lower Your Biological Age: Longevity Bio...

    Aging isn’t just about counting birthdays—it’s about how well your body is functioning at a cellular level. Your biological age is a measure of how youthful your body truly is,...

    How to Lower Your Biological Age: Longevity Bio...

    Aging isn’t just about counting birthdays—it’s about how well your body is functioning at a cellular level. Your biological age is a measure of how youthful your body truly is,...

  • Fasting and Longevity: The Science of Intermittent and Prolonged Fasting

    Fasting and Longevity: The Science of Intermitt...

    Fasting has transcended its origins as a cultural and religious practice to become a scientifically-backed tool for improving health and longevity. By temporarily abstaining from food, the body undergoes remarkable...

    Fasting and Longevity: The Science of Intermitt...

    Fasting has transcended its origins as a cultural and religious practice to become a scientifically-backed tool for improving health and longevity. By temporarily abstaining from food, the body undergoes remarkable...

  • Unlocking Longevity: The Science and Strategies Behind VO₂Max

    Unlocking Longevity: The Science and Strategies...

    Introduction Imagine a single number that predicts how long and healthy your life could be. That’s not science fiction—it’s VO₂Max, your body’s capacity to utilize oxygen during intense exercise. While...

    Unlocking Longevity: The Science and Strategies...

    Introduction Imagine a single number that predicts how long and healthy your life could be. That’s not science fiction—it’s VO₂Max, your body’s capacity to utilize oxygen during intense exercise. While...

1 of 3