Soury Food Aids in Digestion?

One of the common misconceptions by many is that eating/drinking soury food aids in digestion or can help one to lose weight ('cause digest faster).

And before I could blog this out, i just heard my buddy sharing in this same misconception too! -.-

Why would I say its not true?

High acidity food (low pH) shares in the same property as the HCl (gastric juice) in our stomach.

Functions of HCl in our stomach:

1. kill all the microorganisms in our stomach
2. provide an acidic medium for the enzymes (pepsin and rennin) in our stomach to act optimumly

So lets say we drink limau ais (soury) when we eat our maggi goreng (food), when the limau ais enters our stomach, it'll work hand-in-hand with our gastric juice to kill the microbes that we ingest in alongside when we savour our maggi goreng. Other than that, it'd also prepare an acidic medium for protein digestion to take place.

Protein digestion. Yes, thats my point! There are only 2 enzymes present in our stomach, i.e pepsin and rennin and both these enzymes only aid in the digestion of protein. So whats the protein composition in our maggi goreng? The eggs? The tofu? Nothing much i presume.

So now, tell me, how would soury food help in our digestion (talking bout digesting our maggi goreng) when only protein would benefit from it? (:

And oh, I mentioned only digestion in our stomach 'cause digestions in other parts of our gastrointestinal tract (duodenum, pancreas, ileum etc) all tak boleh work optimumly with low pH one. The digestive enzymes in those areas work in their very own optimum pH (pH7-8) or alkaline. Stomach is the only GIT part that works well with acidic medium

Just something to ponder upon (: