Hey Guys, Sorry once again i am posting a thread of a boring topic, but seriously i couldn't find any information on the search engines that why i need your help on, the advantages and disdavantages of Citric acid in lemon juice. I found couple of sentences, but i don't know what it means, so i will just copy and paste the info i got, and if anyone here knows anything can you just tell me. "In order to have very white teeth, brush them twice a week with a mix of not diluted lemon, lime (green lemon) and grapefruit juice (same quantities). This helps also to reduce tartar. On the other way, try to avoid biting and sucking lemon juice, because of the high concentration of citric acid, a prolonged contact can damage the enamel. Lemon juice is very acidic and can dissolve tooth enamel on newly erupted teeth" How does a higher concentration of citric acid can damage the enamel of a tooth? "University of Melbourne's Professor Roger Short made the discovery that lemon juice kills the AIDS virus after he put lemon juice in a test tube with HIV-positive sperm and the sperm were permanently immobilised within 30 seconds. In Australia the Federal Government had refused to fund human trials of this discovery but Roger found the Thai government interested and they will fund a trial on at least 400 Thai men and women. Roger claims the lemon juice also killed syphilis, gonorrhoea and chlamydia. This was due to the acidity of Officials at the international AIDS conference in Bangkok announced the first human trial. " How come the lemon juice killed the baterias? Is it because of the high acidity of citric acid in lemon juice which killed the baterias?