The study by researchers at Karolinska Institute in Sweden has been published in the journal Diabetes.
"Type 2 diabetes can be treated, and sometimes reversed, with dietary interventions," said study co-author Dr Jonathan Little.
The National Health Service estimates that weight gain of one kg, or 2.2 pounds, can increase someone's risk of diabetes by around 8 per cent.
Girls diagnosed with Type-2 diabetes have a high frequency of menstrual irregularities -- a symptom of polycystic ovarian syndrome.
The researchers found an enzyme, AKR1C3, that activates male hormone in the fat tissue of women with PCOS, which could increase the risk of metabolic health complications