Please do not google and copy amp; paste a answer that does not completely answer my question.

Please do not google and copy & paste a answer that does not completely answer my question. I need actual help with an answer that has all of the hormones and mechanisms with an explanation of the question. If you can not answer completely or correctly please do not answer.

A recent meta-analysis evaluating low-fat diets in western cultures has a strong correlation with the increased obesity rise. Why would a high carbohydrate, low fat diet lead to increased obesity. Please explain hormones that are involved and mechanism for full credit.