pH is an abbreviation for “Power of Hydrogen” "pondus hydrogenii (Latian) potentiel hydrogène (French), and potential of hydrogen (English).
The concept of pH was first introduced by Danish chemist S.P.L. Sorensen at the Carlsberg Laboratory in 1909.
The letters pH is also known for Potency of Hydrogen ions so pH is an abbreviation for "power of hydrogen"
Basically it implies the level of acid and alkaline in your body. S.P.L. Sorensen opined that the food we consume is either acidic or alkaline in nature and healthy body must keep a balance between acid and alkaline. If this balance is disturbed then body is prone to various diseases. So he suggested that we must consume pH balancing diet to remain fit and fine.