Balancing body chemistry is often misunderstood. Many people believe the body must be kept as alkaline as possible, yet biology does not work this way. The blood must remain within a narrow pH range of 7.35 to 7.45. Even small deviations can produce metabolic acidosis or alkalosis. The lungs, kidneys, and mineral-buffering systems regulate this range continuously and automatically.
The goal is not alkalinity. The goal is to maintain stable mineral reserves, healthy organ function, and a resilient buffering capacity.
Acids Are Necessary for Normal Physiology
The body produces acids through normal metabolism, including lactic, carbonic, sulfuric, fatty, and amino-acid breakdown products. These acids are neutralized through bicarbonate, phosphate, hemoglobin, and protein-buffer systems. Many beneficial nutrients, such as probiotics, omega-3 fatty acids, and apple cider vinegar, are acidic. Acidity is not inherently harmful; it is essential for digestion, immunity, and enzymatic activity.
The idea that alkaline foods are good and acidic foods are bad is chemically inaccurate. What matters is overall buffering capacity, which depends on mineral adequacy and organ function.
Using Saliva and Urine pH Correctly
Blood pH never reveals metabolic trends because it is too tightly regulated. Saliva and urine pH provide more actionable insight into kidney workload, mineral reserves, and extracellular buffering shifts. They do not diagnose disease. Instead, they show how the body is adapting to metabolic stress, diet, mineral intake, and hydration.
Normal pH Ranges in Key Biological Compartments
- Blood: 7.35 to 7.45. Supports oxygen transport, enzyme activity, and systemic stability.
- Intracellular fluid: 6.8 to 7.2. Slightly acidic due to metabolic processes.
- Interstitial fluid: 7.0 to 7.3. Reflects transition between blood and cells.
- Gastric fluid: 1.5 to 3.5. Required for digestion, mineral ionization, and pathogen defense.
- Saliva: 6.2 to 7.6. Indicates immediate buffering capacity and digestive readiness.
- Urine: 4.5 to 8.0, with 6.0 to 7.0 ideal for homeostasis.
- Bile: 7.6 to 8.8. Neutralizes stomach acid and assists fat digestion.
- Pancreatic fluid: 7.8 to 8.5. Alkalinizes duodenal contents for enzyme function.
- Cerebrospinal fluid: 7.31 to 7.34. Maintains neural ionic balance.
- Vaginal environment: 3.8 to 4.5. Protects against microbes.
- Skin: 4.5 to 5.5. Supports barrier function and microbiota.
- Small intestine: 6.5 to 7.5. Gradual pH rise supports digestion and absorption.
These values demonstrate that different tissues require different pH environments. Forcing systemic alkalinity is neither possible nor desirable.
Minerals and Buffering Systems
Minerals are central to acid–base regulation. Key buffering cations include calcium, magnesium, potassium, sodium, zinc, and manganese. Important anions include chloride, phosphate, sulfate, and bicarbonate. These minerals combine to neutralize metabolic acids and maintain equilibrium. Selenium and nitrogen participate in acid–base and redox reactions.
Practical Interpretation of Saliva and Urine pH
Saliva pH reflects the body’s immediate alkaline reserves and mineral buffering strength. Urine pH reflects acid elimination and how hard the kidneys are working to regulate acid load. When saliva and urine are both acidic, mineral reserves are likely low. When saliva improves before urine, the buffering capacity is rebuilding. When urine becomes alkaline after stress or a high-vegetable meal, the kidneys are releasing bicarbonate.
pH-Guided Nutrient Support
Testing at 2 p.m. provides the most consistent data. Below is the corrected, professionally aligned version of the nutrient recommendations.
- If pH > 7.2: Calcium lactate; sunlight-driven vitamin D; potassium and iodine when indicated; calcium and phosphorus combinations; dry vitamin E and selenium; lower magnesium intake if alkalinity is excessive; methionine, phosphorus, and lecithin as needed.
- pH 6.7 to 7.1: Calcium lactate; moderate vitamin D; iodine; optional magnesium; bone meal, garlic, sodium chloride; liver-supportive foods such as the Spanish black radish.
- Ideal pH 6.4: Calcium lactate; trace minerals, B12; magnesium as needed.
- pH 6.2 to 6.6: Calcium with phosphorus; chlorophyll and cooked greens.
- pH 5.5 to 6.1: High-quality cod liver oil; calcium lactate or gluconate; magnesium chelate; zinc with copper balance.
- pH below 5.4: Cod liver oil; potassium, iron, zinc; fat-soluble vitamins A, E, F; Arginex for kidney support.
Urine Terrain Metrics: pH, Conductivity, and Brix
pH indicates acid–base load. Conductivity indicates electrolyte density and renal concentrating ability. Brix indicates total solute concentration, including urea, salts, ketones, and glucose.
Testing Methods
- pH: strips or meter
- Conductivity: EC meter calibrated to standard solution
- Brix: refractometer
Interpreting Combined Patterns
- Low pH with high EC and high Brix: concentrated metabolic acids, dehydration, adrenal load.
- Neutral pH with low EC and low Brix: overhydration or electrolyte depletion.
- High pH with low EC: kidney bicarbonate release, vegetable-rich intake, or fasting adaptation.
- Acidic pH with low EC but high Brix: metabolic acid load or glucose spillover.
- Neutral pH with high EC and high Brix: typical after sweating or exertion.
Biological Logic
Every cell generates acids. The blood remains stable through mineral buffering. When minerals are low, acids spill into the extracellular fluid. The kidneys and salivary glands then compensate, which is visible in pH testing. This is not a disease diagnosis. It is a snapshot of metabolic workload and mineral status.
Signs Associated with Acid or Alkaline Trends
These symptoms do not originate from pH alone, but from the metabolic conditions that influence pH. Excess acidity tendencies: fatigue, frequent sighing, muscle aches, migraines, UTIs, and inflammatory skin patterns. Alkalosis tendencies: hyperventilation, irritability, insomnia, muscle tightness, and cold sensation.
Summary
Balancing body chemistry is about supporting mineral reserves, kidney and lung function, hydration, and normal physiology. Both acids and alkaline elements play essential roles. Saliva and urine pH are valuable tools when interpreted through physiology rather than simplistic acid–alkaline rules. Conductivity and Brix add insight into electrolyte density and metabolic solute load. The goal is not to force alkalinity but to maintain resilience, buffering capacity, and biological balance.
(For supplement protocols, see the full Course or corresponding podcast.)
Mark Colafranceschi, D.C. • Licensed Chiropractic Physician – Arizona License #009154 • Scottsdale, Arizona