United Kingdom, July 22 -- Brittany Cartwright feels she's regained her "sparkle" after turning to weight-loss medication.

The 37-year-old reality TV star has taken to social media to open up about her weight-loss journey, explaining how GLP-1 medication and a diligent fitness routine have changed her life.

Brittany wrote on Instagram: "I finally got my sparkle back! I'm already down two dress sizes, and summer is just getting started!

"Everyone I knew was having success with GLP-1s, and they were all getting results with @joinfridays . I figured it was time to start, and I'm so glad I did.

"If you've been wanting to get your sparkle back too. maybe it's time to give it a shot. Commit to 3 months and your 4th is free - FOREVER. (sic)"...