Why shouldn't you drink apple cider vinegar every day?

The Risks of Daily Apple Cider Vinegar

Apple cider vinegar (ACV) has gained a loyal following thanks to claims of weight loss, improved digestion, and balanced blood sugar. While it may offer some benefits, drinking it every day—especially in large amounts—can come with unintended consequences.

Most experts agree that small doses—about 1 to 2 tablespoons diluted in water—are unlikely to cause harm for most people. But go beyond that, and problems can start to arise. Because ACV is highly acidic, regular consumption can irritate the lining of the esophagus, leading to discomfort or even chronic acid reflux for some.

One of the biggest concerns is damage to tooth enamel. The acid in vinegar is strong enough to erode the protective layer on your teeth over time, increasing the risk of cavities and sensitivity. Sipping it straight or too frequently throughout the day only makes things worse. Even when diluted, it’s wise to rinse your mouth with water afterward.

More seriously, excessive intake has been linked to dangerously low potassium levels. Potassium is essential for muscle function and heart health, and a deficiency can lead to weakness, fatigue, and in severe cases, heart rhythm issues. There have been documented cases of people developing hypokalemia (low potassium) after drinking large amounts of ACV daily for months.

While ACV isn’t inherently harmful, moderation is key. If you choose to include it in your routine, dilute it well, limit the amount, and avoid swigging it straight. And if you have underlying health conditions or take medications—especially diuretics or insulin—talk to your doctor first.

Like many "natural" remedies, just because it’s popular doesn’t mean it’s safe for everyone, every day.