Nuts are energy-dense foods; they can provide 160-200kcal per serving (30g-a handful), so the concern that high nut consumption may lead to weight gain persists.

Medifast, Inc., U.S. manufacturer and provider of clinically proven weight-loss and healthy living products and programs, announced published clinical studies demonstrating weight loss effectiveness of two Medifast meal plans - the 4 & 2 & 1 Plan™ (also known as Medifast Achieve™) and the 5 & 2 & 2 Plan™.