Polycystic ovarian syndrome (PCOS) is a disorder that affects almost 1 in every 10 women. In this condition, the ovaries develop several small cysts resulting in an abnormality of hormones leading to all sorts of problems such as (but not limited to) acne, hirsutism, weight gain, hair loss, irregular menses, infertility, etc. Even though this condition is not life threatening, it is extremely traumatic for the patient.

Here are a few reasons why diets don’t work with PCOS and we need a more comprehensive treatment plan for recovery :

• Your Genes – Women with PCOS may have a generic advantage originating from prehistoric times. A slower metabolism, infertility, and more body fat helped them survive when others don’t.
• High Insulin Levels – Women with PCOS have higher insulin levels. Insulin is a growth hormone that promotes fat storage and weight gain. It also intensifies carbohydrate cravings.
• Slower Metabolism – PCOS women can lose weight on a very low calorie diet. But, this slows down the metabolism even more. When more food is consumed, weight gain can occur.
• Increased Appetite – In some women with PCOS, the hormones that help us feel hungry aren’t working. Along with high insulin, this could explain why you feel hungry all the time.
• Food Obsessions – Dieting has been proven to cause obsession with food and weight. This is how your body tells you that it needs more nutrition and it won’t stop until you get it.
• Poor Self Esteem – Diets can initially provide weight loss but usually result in weight gain. This can make you feel like a failure and may lead to eating disorder like binge eating.

Reference : http://www.pcosnutrition.com/diets/