Final answer:
In calorie-matched conditions, no significant impact on weight is most likely. The body adjusts its basal metabolic rate to compensate for overeating or undereating, affecting weight loss and regain. The type of food ingested can also impact the body's metabolic rate.
Step-by-step explanation:
The most likely case in calorie-matched conditions, according to most systematic reviews and meta-analyses, is no significant impact on weight.
Research indicates that changes in metabolic rate favor weight regain in weight-reduced individuals. The body adjusts its basal metabolic rate to partially compensate for over-eating or under-eating, meaning that weight loss may be slower and weight regain more likely.
Additionally, the type of food ingested can affect the body's metabolic rate. Processing carbohydrates requires less energy than processing proteins, and the number of calories ingested versus burned determines overall weight.