Which of the following describes a potential effect of caffeine on nutrition?

Caffeine is a diuretic, which means it can increase urine production. When consumed in large amounts, caffeine can lead to dehydration due to this increased urination. This potential effect is particularly relevant for individuals who consume excessive quantities of caffeine without adequate fluid replacement. It's important to note that moderate caffeine consumption typically does not result in significant dehydration for most people, but overconsumption can certainly disturb the fluid balance in the body, making hydration an important consideration.

The other options do not accurately capture the nuanced effects that caffeine can have on nutrition. While caffeine is known to boost metabolism for a temporary period, it does not consistently decrease it. It is also not accurate to state that caffeine is always beneficial; its effects can vary widely among individuals and can have negative impacts like increased heart rate or anxiety. Lastly, caffeine's diuretic properties mean that it does indeed have an effect on hydration status, contrary to the claim that it has no effect at all.