According to the theory behind an alkaline-based diet, consuming too much acidic food will cause an increase in the acidity (and decrease in pH) of your body, thus increasing your chances of diseases like osteoporosis and cancer. Yikes! But before you start stressing out about your next meal, let me shed some light on why this theory may not make that much sense.
Fact #1: Foods can't influence the pH of your blood.
There is truth behind the theory that food leaves behind an acidic or alkaline "residue" once it's metabolized. In general, animal products and grains are acid-forming, while fruits and vegetables are alkaline-forming. Contrary to popular belief, pure fats, sugars and starches are neutral as they don't contain protein, sulfur or minerals.
Go ahead, grab a pH stick and test your urine a few of hours after having a green smoothie or chicken sandwich. You'll see the green smoothie creates a more alkaline urine while the sandwich produces an acidic urine.
However, unless you suffer from kidney disease or insulin resistance, you can't substantially change the pH of your blood by changing the foods you eat. This is because your body is programmed to work within a blood pH of around 7.4. A slight change of this pH and your body starts to shut down. For this reason, your body is awesome at tightly regulating the pH of your blood.
Fact #2: An acidic diet doesn't cause demineralization of bones and osteoporosis.
The theory speculates that the body pulls minerals from our bones to neutralize any excess acid produced from our diet and, over time, this can cause bone demineralization and osteoporosis. However, this theory completely negates the vital role that the kidneys play in pH regulation. You see, the kidneys create a sustainable cycle for maintaining body pH without any role of the bones. Here is how it all goes down ...