system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When we say a food makes our body more alkaline, what does that mean exactly and why is it healthy?
gpt
It's pseudo-science. Your body very tightly regulates the pH of your blood in a narrow range through a variety of mechanisms. Your diet has little effect on your blood pH. Even if it did, the promoters of this fad diet make claims like lemons make your body more alkaline, despite being a very acidic fruit.