Trainer and nutritionist Harley Pasternak, is the cofounder of Sweetkick, a brand helping people curb their sweet tooth. What’s so refreshing about Pasternak is that he gets it: People love birthday cake.

“The degree to which the diet is difficult to follow will determine how long someone will continue to do it,” says nutritionist and trainer Harley Pasternak.

Sweetkick Founder on Entertainment Tonight talking Jessica Simpson's weight loss and how Sweetkick can help control sugar cravings.

Watch Sweetkick Co-Founder Harley Pasternak talk about how much sugar Americans are overeating and having the hosts try the Sugar Control Mint.

Watch Sweetkick's Founder Harley Pasternak on CA Live showing the hosts the 14 Day Sugar Reset.

See Sweetkick Co-Founder Harley Pasternak on Hallmark's Home and Family talking about the Sweetkick Sugar Control Mint and the hidden sugars in your diet.

Since welcoming her third child, Birdie Mae, in March, the businesswoman has made her health and wellness the utmost priority. Now, six months later she's 100 pounds lighter.

After a summer of ice creams, do your skin a favor and ditch the sugar with the help of celebrity trainer Harley Pasternak. Pasternak, (who works with Lady Gaga, Rihanna, Robert Downey Jr. and more), recently founded Sweetkick.

The star trainer is a veteran with Khloé Kardashian’s squad of trainers who motivate those who need that focus, energy, and guidance to get their best body ever.

Celebrity trainer Harley Pasternak has been a vital piece of body transformations and health journeys for stars such as Lady Gaga and John Mayer to Miley Cyrus and Jimmy Fallon.

Too much sugar can cause a lot of different health issues, but just because you're not downing ice cream sandwiches and soft drinks all day doesn't mean you're in the clear.

As she made cookies for her family, trainer Harley Pasternak dropped by. A personal trainer for 25 years, he'd worked with Adam Levine, Katy Perry and Ariana Grande.