Final answer:
Fad diets are diets that aren't based on sound science and become popular to follow. They often make exaggerated claims and provide limited or misleading information about nutrition.
Step-by-step explanation:
Diets that aren't based in sound science and become popular to follow are called fad diets. These diets often make exaggerated claims and provide limited or misleading information about nutrition. Many fad diets promote quick weight loss or promise to target specific health concerns without adequate scientific evidence.
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