I’ve tried various low-carb, low-calorie, and low-fat diets for the past couple of years. Although the Atkins diet is very popular, it made me feel somewhat unhealthy.
The diet plan I’m on right now is the Medifast Diet. The caloric intake is roughly 800-1000 calories. However, it doesn’t make my body feel weak. It is a bit of a pricey diet, but there are plenty of coupons available on the internet (i.e.http://www.swoopup.com/stores/deals/Medifast-Diet). You should never pay full price.
My advice is just choose a diet plan which your body reacts positively to. No one knows your body better than you do!