For 27-year old Tess Lankers (@robiinfit_xv on Instagram), losing weight wasn't the issue at first. She had struggled with her health growing up all the way until age 24, and was actually underweight. Doctors couldn't figure out what was wrong with her.
She was tested for cystic fibrosis, celiac disease, Lyme disease etc., but the tests all came back negative. Tess told POPSUGAR, "doctors started thinking it was all in my head." She wanted to start working out, but with her health not being great, it just wasn't realistic. Doctors finally found out what was wrong, which was amazing, but treatment made her gain weight. Keep reading to learn Tess's amazing story.