Acid-Base Balance
Nutritional approach aimed at maintaining body pH balance through selection of alkalizing foods and reduction of acidifying foods, to prevent demineralization and chronic inflammation.
Nutritional approach aimed at maintaining body pH balance through selection of alkalizing foods and reduction of acidifying foods, to prevent demineralization and chronic inflammation.
Presentation
Acid-base balance is a fundamental concept in naturopathy and functional nutrition. The human body maintains strict blood pH between 7.35 and 7.45 through powerful buffer systems. However, modern diet generates a net metabolic acid load (NEAP) that constantly strains these buffer systems and draws on the body's mineral reserves.
The concept of low-grade tissue acidosis has been studied since the work of Remer and Manz (1995) who established the PRAL index (Potential Renal Acid Load) to classify foods.
The PRAL Index
PRAL quantifies the potential acid or alkaline load of a food after metabolism. Acidifying foods (positive PRAL) include meats, fish, eggs, cheeses, refined grains and sugars. Alkalizing foods (negative PRAL) include fruits, vegetables, herbs, potatoes and bicarbonate mineral waters. Examples: parmesan +34.2; beef +12.5; spinach −14.0; raisins −21.0.
Consequences of Chronic Acidosis
- Bone demineralization
- Muscle wasting
- Kidney stones
- Chronic low-grade inflammation
- Fatigue and joint pain
- Long-term renal function impairment
Rebalancing Protocol
The goal is reaching a 60-70% alkalizing to 30-40% acidifying food ratio daily. The protocol includes increasing vegetables at every meal, daily fruit consumption, reducing animal proteins, limiting refined grains, hydration with bicarbonate waters and measuring urinary pH morning and evening for 7 days.
Scientific Nuances
The tissue acidosis hypothesis remains debated. The body very effectively regulates blood pH. However, epidemiological studies show that high acid load diets are associated with increased osteoporosis, sarcopenia and kidney stone risk. Alkalizing eating aligns with general nutritional recommendations, making its benefits hard to separate from overall healthy eating.
Medical Disclaimer
The information presented in this article is provided for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment prescription. If in doubt, always consult your physician or a qualified healthcare professional. The techniques described do not replace conventional medical treatment.