Energy is one of the biggest industries in the world today — and I'm not talking about solar panels and windmills. From supplements to weight gain powders to flavored drinks, we're living in a golden age of energy products.

One of the major players is Nutrabolt. Founded in 2002, the company is now on the verge of becoming a billion-dollar brand, and its new beverage line, C4 Performance Energy, partnered with several NBA teams, has already become the fourth-best-selling energy drink in the country.

"Energy drinks have been stigmatized for a long time," Nutrabolt CEO and co-founder Doss Cunningham tells Entrepreneur. "Many legacy brands have a reputation for not being particularly healthy."

He sees the recent boom as an opportunity to transform the industry and usher in what he calls the "Energy Drink 2.0 landscape." And he's partnered with one of the biggest celebrities ever to do it.

Related: It's Time to 'Choose Better' — Inside BODYARMOR's Play for the Sports Drink Crown

Cunningham grew up playing sports, though not as many as he would have liked.

"It was really hard for me to gain weight," he shared. "It kept me from playing football."

From a young age, he developed a deep interest in sports nutrition, studying supplements and regularly using weight gainers and protein powders.

Despite his passion, Cunningham had no plans to enter the

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