Human saliva typically has a pH ranging from slightly acidic to slightly alkaline (often around 6.2 to 7.6), making this a matter of everyday physiological observation that does not require citation.
Human saliva typically has a pH ranging from slightly acidic to slightly alkaline.
The claim that human saliva is slightly acidic is a well-known physiological fact, with baseline pH values generally hovering near neutral and varying slightly depending on flow rate, diet, and fasting status. As a basic statement of biological fact covered by everyday observation and foundational physiology, no specific citation is necessary, placing it under common knowledge.