Gigi Hadid Opens Up About Having Thyroid Disease & How It Has Contributed To Her Weight Loss

Everyone faces a battle no one knows about.
For Gigi Hadid, that's thyroid disease.
The 21-year-old may grace our magazine covers and walk down every runway, but because of her Hashimoto's disease she's unable to keep weight on -- which can be tough, even for a supermodel.
Related: Gigi Is Taking A Break From Social Media!
Speaking to Elle at Reebok's #PerfectNever event on Wednesday, Kendall Jenner's bestie opened up about her health while talking about prepping for the Victoria's Secret Fashio