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Buttermilk is often celebrated as a traditional, cooling beverage packed with probiotics, essential vitamins, and minerals. Commonly enjoyed across cultures for aiding digestion and hydration, it has found a place in many people’s daily routines. However, while buttermilk offers health benefits when consumed in moderation, regular or excessive intake may have unintended side effects. From digestive discomfort and allergic reactions to high sodium content and weight gain, your daily buttermilk habit might be doing more harm than good, especially if you have pre-existing health conditions. Understanding these potential downsides is crucial for making informed dietary choices



Potential side effects of drinking buttermilk daily

1. Digestive issues and lactose sensitivity

Though fermented, buttermilk still contains lactose. For those with lactose intolerance, even this lower-lactose product can cause bloating, gas, diarrhoea, or cramps. In some individuals, probiotics in buttermilk may disrupt gut flora, leading to either diarrhoea or constipation.


2. Acid reflux and heartburn

Buttermilk’s acidity means it can aggravate acid reflux or heartburn, particularly when consumed at night. Symptoms may include regurgitation, a metallic or sour taste, and disrupted sleep.


3. High sodium intake

Commercial buttermilk often contains added salt, elevating its sodium content significantly, sometimes up to 300–500 mg per cup. Excess sodium may contribute to high blood pressure, fluid retention, and added strain on the heart, kidneys, and blood vessels.


4. Weight gain and excess calories

While buttermilk is generally lower in fat than whole milk, flavoured or commercial versions may contain extra fats or sugars, increasing its calorie content. Overconsumption can contribute to unwanted weight gain, particularly when paired with other high-calorie foods.


5. Allergic reactions

Buttermilk contains milk proteins like casein and whey. Individuals with a dairy allergy may experience hives, itching, swelling, respiratory issues, or in rare cases, anaphylaxis.


6. Calcium overload and kidney impact

Consuming too much calcium, especially from dairy products, can increase the risk of kidney stones and arterial calcification. Additionally, buttermilk's potassium and phosphorus can be problematic for those with chronic kidney issues.


7. Migraine triggers

Buttermilk contains tyramine, a compound known to trigger headaches or migraines in sensitive individuals.


8. Medication interference

The calcium and dairy content in buttermilk may interfere with absorption of certain medications, such as antibiotics, thyroid treatments, or osteoporosis drugs. It is often recommended to separate intake of buttermilk and such medications by at least two hours.


9. May worsen respiratory symptoms

In some people, buttermilk may exacerbate symptoms of cold, cough, or congestion, particularly when consumed at night, possibly due to its cooling properties in traditional medicine.


Buttermilk can offer digestive and nutritional benefits when consumed occasionally and in moderation. However, daily intake may pose health risks for certain individuals, especially those with underlying conditions. It's important to listen to your body, monitor any adverse reactions, and consult a healthcare professional to ensure buttermilk fits safely into your diet.





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