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No, an all-shake diet often falls short on fiber and food variety, so it’s tough to meet needs long term.

Yes, 20 pounds in six months is a steady target for many adults when daily habits create a consistent calorie gap.

Losing 20 pounds in three weeks is rarely fat loss; most people can drop a few pounds fast, but 20 in 21 days isn’t a safe, steady target.

Yes, it can happen for some people, but 25 pounds in 8 weeks is aggressive and often calls for tighter tracking and a steadier backup target.

No, losing that much in 12 weeks is rarely safe or realistic without close medical care, and the risks often outweigh the payoff.

Yes, dropping 30 pounds in 5 months can be doable for many people if your plan targets a steady weekly loss and you can keep it going.

Losing 40 pounds in five months can happen for some people, but it calls for steady habits, a safe pace, and patience with weekly ups and downs.

Two weeks can trim waist size a bit by easing bloat and starting fat loss, yet longer consistency brings the clearest belly change.

Losing 60 pounds in six months may happen for some people, but it needs a steady plan and check-ins with a clinician.

A fruit-only menu can drop scale weight at first, but it often falls apart because it’s low in protein, fat, and several nutrients your body needs daily.