Dr. Schwarzbein is a lady, but IIRC she has worked specifically with female diabetics, so she might "click" with your sister a bit better. Women diabetics often have a lot of hormone issues going on that can complicate diabetes (thyroid, PCOS, etc...) so it's almost a subspecialty. Her plan tends to be a bit higher in carbs than Dr. Bernstein's, but it's still a lot lower than what your sister is typically eating right now. I believe that Dr. Schwarzbein allows 15 grams of carbs at meal time and 7.5 for a snack. That's more than I can handle right now and still maintain the type of control I want, but perhaps when I get to a lower weight or reach maintainence, it may work better then.