“Coffee stunts your growth.”

The idea that drinking coffee prevents children from growing tall is a widespread misconception with roots in early advertising. Much of this enduring belief can be traced back to the late 19th and early 20th centuries, specifically to marketing campaigns for Postum, a roasted grain beverage designed as a coffee substitute. C.W. Post, the creator of Postum, actively promoted pseudoscientific claims that coffee "hampers proper development and growth" to boost sales of his caffeine-free product. These persuasive advertisements, often depicting coffee as detrimental to children's well-being, ingrained the notion in the public consciousness.

Despite this popular belief, there is no scientific evidence to support the claim that coffee or caffeine directly stunts growth. A person's ultimate height is primarily determined by their genetic makeup, inherited from their parents. Factors such as adequate nutrition and overall health during childhood and adolescence (Review) also play significant roles in reaching one's full growth potential. While caffeine can slightly reduce calcium absorption, the effect is negligible and easily offset by a small amount of milk. Studies investigating the long-term effects of caffeine on bone growth in adolescents have found no correlation with stunted height.

The myth's persistence is likely due to a combination of historical advertising influence and a general cautious approach parents take regarding children's caffeine consumption. While excessive caffeine intake in children and teenagers is not recommended due to potential issues like sleep disruption, increased heart rate, and anxiety, these are indirect health concerns and do not directly interfere with physical growth. The key takeaway is that while it's wise to limit caffeine for younger individuals for other health reasons, it will not prevent them from reaching their genetically determined height.