I went on Beyonce's 22-day diet - and I lost 15 pounds

Beyoncé tried "The 22-Day Revolution" diet after she had her first child. The plan is a vegan, plant-based diet that eliminates all processed foods. Beyoncé wrote the foreword for the book and backed a meal-delivery service based on it. I decided to try it for myself, and it turned out better than I'd hoped. Following is a transcript of the video.

If it worked for Beyoncé, it'll work for me. Right?

My name is Kevin Reilly, and I'm a video producer for Business Insider.

So I tried this vegan-diet challenge out, the 22-Day Revolution. It was an all-vegan, all-plant-based diet, kind of made famous by Beyoncé. She wrote the foreword to the book and actually had gone on it herself after her first child.

I figured if it's going to work for her, it's got to do something for me.

But as a meat eater, just moving away from everything that I was used to, I thought it was going to be daunting. And let me tell you, that first week was rough. I wanted the food that I was used to eating. I was cranky, I actually felt tired on a couple days, and really I just wasn't into it.

It took me an hour and 10 minutes to get my lunch together last night. It's this weird lentil, quinoa thing that I keep having to take a couple bites of and then chug some water, because it's just mealy and kind of nasty. I don't like steak that much, and I miss steak right now.

But guess what? If you want some results, three weeks into this thing, 15 pounds gone. Take a look at the before-and-after. Not bad, right?

But hold on a sec. At times I found myself starving. There was one meal that was only a cucumber, a zucchini, a carrot, and some tahini. And yeah, I cheated. That first week I had a slice of pizza, a slice of meatball. It was good.

But I wanted to complete this thing. Not just for work, but for myself. So I got back on the wagon and went for it. And let me tell you, the second week things started getting better. I felt like I had a lot of energy. I was - I don't know - feeling good about myself. And let me tell you, a few of these meals were really damn good. My favorite by far was the baked eggplant with pico de gallo. That was good. I even tried it out grilled, which might be better than the original recipe.

However, on the flip side, there's the pizza. The dough smelled funny. The cheese was like this gummy, gooey mess made out of cashews, and the end result? No, just no.

So here's the thing: There were a lot of good parts about it. I lost weight; I was feeling good. That was fantastic. But not knowing the calorie counts, the fact that the servings sizes in the actual recipes wasn't really there left me not knowing whether I should keep eating more or if I was just hungry.

My first day back to meat-eating land, my boss brought in this big, giant, good-looking plate of bacon. I didn't touch any of it, not even a bite. For some reason, I just liked the way I felt. I had this somewhat different outlook. I started researching more veggie recipes. I started going to the farmers' market and started craving the veggies that were there. I like this. I want to feel like this a little bit more.

Now, am I changing myself to a vegan? No. That first night I went to my favorite restaurant and had a damn good tuna melt. And I'll be having more of those. But do I feel fabulous like Beyoncé? Sure.