Tia Mowry Shows Off Her Toned Stomach After 20-Lb. Weight Loss

Tia Mowry‘s hard work has paid off!

After being diagnosed with endometriosis, the Sister Sister actress overhauled her diet and has been sticking to the principles outlined in her cookbook Whole New You. She shuns “processed, packaged” foods and instead opts for “whole foods” like fruits, vegetables, seeds and whole grains, she told PEOPLE.

And the Tia Mowry At Home star, 38, is thrilled with the results, which she recently shared on Instagram. The mom posted an image of herself wearing leggings and lifting up her t-shirt to reveal her abs, “I’ve lost 20 pounds! Many asked how? Diet and cooking out of my cook book #wholenewyou,” she captioned the photo.

Although she mostly sticks to clean eating, Mowry will still indulge in the occasional treat. Prior to posting her weight loss photo, the star took to Instagram to share a picture of herself licking an ice cream cone. “Ice cream didn’t stand a chance,” she wrote.

Mowry didn’t always have such a healthy relationship with food. In her cookbook, she reveals she developed poor eating habits on the set of Sister Sister, where she would snack on candy, cookies and potato chips. She then tried to counteract the junk food by taking diet pills.

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“I didn’t feel fat, but the pressure of being on television and wanting to look sexy and beautiful took over,” she wrote in her book. “I’m not proud of it. I got skinny, true, but the pills caused my heart to race, and I knew in my gut that I was hurting myself.”

Now the star is focused on her healthy lifestyle. Her daily food log might include gluten-free pancakes, kale and almond fried rice for lunch, and a light fish with veggies for dinner. “What I eat and what I put into my body is extremely important to me,” she wrote.