Been on levothyroxine 1 yr 3 months. no period at 18 yrs old and distance runner. worked with nutritionist and gained 10 lbs but no period. possibly still undereating but wondered if i ate more my t3 free levels would improve. would i gain weight?

Hypothyroidism: I commend you for gaining 10lbs Hypothyroidism can cause depression affecting your” period” “It is NOT what you eat- It Is WHAT is eating You! At age of 18, you possibly are going through stresses of relationships, separation, school and finances causing depression. See Endocrinologist for Thyroid problem, blood test for T3, T4 and TSH and dose of Levothyroxine and Psychiatrist for depression.