Some weight loss can be a normal part of aging usually due to shrinking muscle mass but it could be Gastrointestinal issues, which could lead to malnutrition or Hyperthyroidism and that can accelerate the body’s metabolism
It could be smoking, since my grandpa had the same thing happen to him until he quit.
Are there options? It can be a wide choice to choose from and would help if you could be more specific.
