What does a saliva ph of 5 indicate? i'm 27 and otherwise healthy.

Acidic!: Saliva ph of 5 is quite low! that means your saliva is quite acidic. Makes me wonder if you didn't have it checked right after drinking a can of pop or a cup of coffee or something along those lines.

Calcium : A saliva ph of 6.5 or lower indicates a calcium deficiency.

Saliva: Low pH of 5 means your saliva is acidic, such as in dry mouth or GERD or consuming sugary foods.