Hey, I know this sounds incredibly stupid and I understand why people repost this, and I doubt the people who are posting this know shit about it either, however there is more nuance to the situation.

While lemon juice is acidic, citric acid in lemon juice is metabolized in the body and alkalizes urine. It does not alkalize the blood.

https://www.healthline.com/nutrition/lemon-juice-acidic-or-alkaline