食物盲从现象指某些与食物有关的信息在社会快速传播，导致大量人盲目跟从，造成大规模抢购的现象。

某些商业广告或推销策划会通过制造“潮流”的手段引发食物盲从现象，以提高产品销量。例如某些减肥食品或保健品通过小范围传播制造神秘氛围，不断扩散后让大众突然对减肥食品或产品有很大的兴趣，从而大量购买引致缺货。又或者通过严肃学术机构认证（或伪造学术机构认证）制造氛围，形成大量购买现象。譬如中国有炒作普洱茶养生功效导致普洱价格飙升的事件。

A fad diet or diet cult is a diet that makes promises of weight loss or other health advantages such as longer life without backing by solid science, and in many cases are characterized by highly restrictive or unusual food choices. Celebrity endorsements are frequently associated with fad diets, and the individuals who develop and promote these programs often profit handsomely.