If the PRAL value of a food is negative then the food has an alkalising effect and if the number is positive it indicates it is acid forming.
Healthy Blood has a pH of 7,35 - 7,45, slightly alkaline as 7 is neutral and normal Saliva pH is 7 - 7,5
Urine: "Korean study reported that both acidic (pH ≤5.5) and neutral (pH of 6.0–7.5) urine pH was associated with a higher risk of total mortality compared with an alkaline urine pH (pH ≥8 )"
Correct food intake of 70% alkaline and 30% acidic is essential for correct pH level and health.
In short
Acidic food: Seafood, Meat, Cheese, Grains, pasteurized food, Milk, Pale Beer, Carbonated drinks (sparkling mineral water, Coke...)
Alkaline food: Fruit, Vegetables, Herbs/Spices, natural fermented food, Honey, Some Nuts (Chest, Pine, Coco, Hazel, Macadamia), Wine, Draft Beer, Stout Beer, Coffee
The PRAL score of almost 7000 foods
http://dietgrail.com/lowaciddiet/
Great PRAL calculator
http://maxmcarter.com/pral/pral_calc_form.php#start
Dietary acid load and mortality among Japanese men and women: the Japan Public Health Center Study
https://academic.oup.com/ajcn/article/106/1/146/4569818
a high dietary acid load score is associated with an increased risk of death from all causes and CVD, particularly IHD mortality. The findings of our study suggest that maintaining an adequate acid-base balance can contribute to longevity by decreasing the risk of death, predominantly from CVD. Further prospective research and randomized trials are needed to confirm our findings.
Dietary acid load and chronic kidney disease among adults
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4151375/
To our knowledge, this is one of the few studies to assess the relationship of dietary renal acid load with markers of CKD in a large, representative population, and to examine the association of socio-demographic characteristics with dietary renal acid load. Our findings suggest that high DAL is associated with greater risk of markers of CKD, and older age, poverty, racial/ethnic minority status, and limited education are independently associated with high DAL among U.S. adults. The findings have important implications, in that, if they are corroborated in other studies, altering diets may provide an adjunct approach to other strategies for treatment of CKD. Longitudinal studies in large representative populations should be conducted to examine a potential causal relationship between NAEes and CKD.