The South Beach Diet is the low-glycemic plan cardiologist Arthur Agatston published in 2003. It is stricter than a normal menu for two weeks, then adds fruit, whole grains, and other carbohydrates back in. It is not a zero-carb diet, and it is not the same thing as the later South Beach Living meal-delivery brand.
Start here if you want the rules.
- Phase 1 — two weeks, no fruit, grains, sugar, or alcohol
- Allowed foods — the list people search for most
- Meal plan — a week of Phase 1 menus
- Phase 2 — how foods come back
- Vegetarian version
What the plan actually changes
Phase 1 cuts the foods Agatston treated as fast-acting carbohydrates: sugar, fruit and juice, bread, rice, pasta, potatoes, and alcohol. Meals are built from lean protein, non-starchy vegetables, low-fat dairy, and measured nuts and olive oil. Phase 2 puts fruit and whole grains back one serving at a time. Phase 3 is the same pattern, used as maintenance.
The original book estimated a large drop on the scale in the first two weeks. Treat that as the author's claim, not a promise. A lot of the early change is water. The plan only works after that if the Phase 2 menu is one you can keep.
Where the brand went
Nutrisystem bought the South Beach Diet brand in 2015. Prepared meals are now sold as South Beach Living, inside the Nutrisystem business. The food lists on this site describe the book plan, which you can cook yourself. The books are still the source: The South Beach Diet, the Good Fats/Good Carbs guide, and the cookbook.