I think Advocare products are similar to Isagenix products. My Crossfit gym uses Isagenix and I know of another gym in the area that uses Advocare so I'm assuming they're comparable. Based on that assumption, I'd think the challenge would be ok for you to do. I did a 30 day Isagenix challenge successfully. The shakes hadron sugar and carbs than I'm used to, so there was a bit of an adjustment period where I had to figure out how the shakes affected my bgs. There were also cleanse days where I didn't eat any solid foods and those went fine.