|
| Organ, fluid or membrane | pH | Function of pH |
|
| (1) Skin | Natural pH is between 4 and 6.5 [17] | Barrier protection from microbes |
| (2) Urine | 4.6 to 8.0 [18] | Limit overgrowth of microbes |
| (3) Gastric | 1.35 to 3.5 | Break down protein |
| (4) Bile | 7.6 to 8.8 | Neutralize stomach acid, aid in digestion |
| (5) Pancreatic fluid | 8.8 | Neutralize stomach acid, aid in digestion |
| (6) Vaginal fluid | <4.7 [13] | Limit overgrowth of opportunistic microbes |
| (7) Cerebrospinal fluid | 7.3 | Bathes the exterior of the brain |
| (8) Intracellular fluid | 6.0–7.2 [19] | Due to acid production in cells |
| (9) Serum venous | 7.35 | Tightly regulated |
| (10) Serum arterial | 7.4 | Tightly regulated |
|