Gastric reflux: why does lemon juice become alkaline once digested?

Acid Reflux: Why Lemon Juice Becomes Alkaline Once Digested

It seems completely counterintuitive: if you suffer from acid reflux, why do so many holistic health experts recommend drinking highly acidic lemon juice? The answer lies in the fascinating difference between the physical properties of a food outside the body and its metabolic effect once it has been fully processed by your digestive system.

Acidic by Nature, Alkaline by Metabolism

In its natural state, lemon juice is undeniably acidic, with a pH of around 2.0 due to its high concentration of citric acid. If you test a lemon with a pH strip, it will glow red. However, once you drink that lemon juice, your body begins to metabolize it. During the digestive process, the citric acid is broken down and oxidized. The end products of this metabolism—primarily potassium and magnesium minerals—leave an alkaline “ash” in your bloodstream and urine.

How It Helps (Some) Acid Reflux Sufferers

Acid reflux and GERD are complex conditions. Sometimes, they are caused by too much stomach acid, but surprisingly often, they are caused by too little stomach acid. If your stomach doesn’t have enough acid to properly break down food, the food ferments, creating gas that pushes open the esophageal sphincter and causes reflux. Drinking diluted lemon water before a meal can introduce just enough natural acid to aid digestion, preventing that fermentation process.

The Danger of the Direct Hit

While the end result of lemon juice is alkaline, the journey matters. As the acidic juice passes through your esophagus and into an already inflamed stomach, it can cause immediate irritation and burning. This is why you should never drink pure, undiluted lemon juice if you have reflux. The direct contact of the acid on sensitive tissues will cause pain long before the alkalizing effect takes place.

Finding Your Balance

If you want to test lemon water for acid reflux, proceed with caution. Start with a very small amount—just one teaspoon of fresh juice in a large glass of warm water—and drink it 20 minutes before a meal. See how your body reacts. If it relieves your symptoms, you can slowly increase the amount. If it exacerbates your heartburn, stop immediately; your specific type of reflux may not respond well to this method.