Onnit is perhaps best known for it’s groundbreaking, clinically validated supplement  line, but it goes a lot deeper than that.  Whether you are like one of the elite performers found on our Pro Team, or just an everyday sort of hero looking to make the most of life, Onnit is a pledge to help you find the answers and the tools to reach your full potential—in your body and in your life.

Our mission at Onnit can be summarized in three words: total human optimization (THO). As our founder and CEO Aubrey Marcus likes to say, THO is a commitment to get strong in the places where we are weak, become great in places where we’re good, and shine a light on the stuff we need take a look at. Supplements play a part in that, but they can’t take you all the way on their own.


Featured Athlete / Entertainer


Errol ‘The Truth’ Spence Jr.

Errol “The Truth” Spence Jr. is a rising star in the 147-pound division, making quick work of most of his opponents. A U.S. Olympian in 2012, the unbeaten southpaw began boxing at age 15 under his father’s guidance. Spence may not have a ton of ring experience yet, but you can’t entirely blame him—that’s just what happens when you stop most of your opponents in the early rounds. That’s been a good problem for Spence so far in his professional career, as the Desoto, Texas, resident has only had to go the distance three times in maintaining a perfect record.

The southpaw packs a lot of power, and has shown a real knack for inflicting early damage and then pouncing, putting his opponents away before some fans have even taken their seats. He won the International Amateur Boxing Association world championship in 2008, and then captured the U.S. National Amateur championship three straight years (2009-11). He won the 147-pound title at the 2012 U.S. Olympic trials before losing in the quarterfinals at the London Games. Spence showed his knockout ability in his professional debut in November 2012, finishing off Jonathan Garcia in the third round. He then KO’d six of his next seven opponents, five of them in the first round. That’s not to say that Spence can’t last, however. Ronald Cruz went the distance with Spence in Las Vegas in June 2014, but the former Olympian didn’t lose a round and won the 10-round bout by unanimous decision.

Most recently Spence has impressive early round finishes of Chris Algieri and Leonard Bundo both of whom had previously never been finished. He will now look to take the 147lb title in his next bout!

Onnit is a great support to my training and performance, helping to keep me extra sharp and at the top of my game. – Errol ‘The Truth’ Spence Jr

Errol ‘The Truth’ Spence Jr. Recommends

Alpha Brain is great during my late night training sessions. When I am tired but still want to stay extra sharp during a training session I will use this product. It also helps with the long days when I come home from the gym or track and get to spend time with my little baby girl.