Underweight all my life.

Hi all! I have been underweight my whole life and have been so unhappy about it. Everyone kept telling me when I got to a certain age my metabolism would slow down and would gain weight. Well, now I am 30 years old and i'm 5'7 and 119lbs. I did a Candida test on myself and realized that I have it. I can't believe all the doctors I've seen have not even brought it up as a possibility. They would just tell me to eat more. Which would infuriate me. I have been taking acidophilus and want to buy Betaine HCL. I also heard threelac was very good. I would love some feedback on this. Thank you!!! Tweet