South Beach
Three phases over four weeks: two weeks with no starch or fruit, then good carbohydrates back in controlled portions.
Keto
Very low carbohydrate throughout: no starch, no fruit, fat as the primary energy source.
Atkins
Two weeks of induction with no starch or fruit, then carbohydrates back in small steps.
Low carb
One starch portion and one fruit portion a day — no phases, no induction weeks.
Mediterranean
Not phases but weekly targets: fish at least twice, pulses at least three times, red meat at most twice.
DASH
Designed to lower blood pressure: little red meat, plenty of vegetables and wholegrains, no added sugar.
Vegetarian
No meat and no fish. Eggs and dairy are included.
Vegan
No animal products at all.
Restrictions layered on top
Gluten-free
No wheat, rye, barley, spelt, durum, couscous, bulgur or ordinary soy sauce.
Lactose-free
No milk, yoghurt, cream cheese or fresh cheeses. Aged cheeses such as parmesan are still included.
Low FODMAP
No onion, garlic, pulses, pears or honey. Cuts hard into the choice of recipes.
No pork
No pork tenderloin, chops, minced pork or ham.
No alcohol
No wine or other alcohol, whatever the diet otherwise allows.