Dietary foods with low acidity
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Dietary Acid Load and Low-Acidity Foods
Dietary acid load (DAL) is a measure of how much acid or base a diet produces in the body. High DAL is linked to negative health outcomes, while low-acidity (alkaline) diets are considered beneficial for overall health and disease prevention Carnauba2017Adeva2011Wieërs2024.
Fruits and Vegetables: Key Low-Acidity Foods
Fruits and vegetables are the main food groups associated with low dietary acidity. These foods are rich in potassium, magnesium, and other minerals that help neutralize acid in the body. Studies consistently show that higher fruit intake is linked to lower net acid excretion, indicating a lower acid load Shea2016Storz2022Storz2022+3 MORE. Vegetables also contribute to a lower acid load, though the association is sometimes less pronounced than with fruits Shea2016Vincent-Johnson2023.
Plant-Based and Vegetarian Diets: Naturally Low in Acidity
Plant-based diets, including vegetarian and vegan diets, are naturally low in acidity. These diets emphasize fruits, vegetables, legumes, and whole grains, while limiting or excluding animal products. Research shows that vegetarians have significantly lower dietary acid load scores compared to non-vegetarians, mainly due to higher intake of alkalizing foods and lower intake of acid-producing animal proteins Storz2022Storz2022Wieërs2024+2 MORE.
Acid-Producing Foods to Limit
Animal-based foods such as meat, dairy, cheese, and eggs are the main contributors to dietary acidity. Grains and processed foods also increase acid load, though to a lesser extent than animal proteins Shea2016Carnauba2017Storz2022+5 MORE. Diets high in these foods are associated with higher net acid excretion and increased risk of metabolic imbalances and chronic diseases Carnauba2017Adeva2011Wieërs2024.
Health Benefits of Low-Acidity Diets
Low-acidity diets, rich in fruits and vegetables, are linked to several health benefits. These include reduced risk of kidney stones, improved bone health, better muscle mass retention, and lower risk of chronic diseases such as type 2 diabetes, hypertension, and cardiovascular disease Carnauba2017Adeva2011Wieërs2024+1 MORE. In people with chronic kidney disease, reducing dietary acid load through increased fruit and vegetable intake or very low-protein diets can help manage metabolic acidosis and improve clinical outcomes Vincent-Johnson2023Di Iorio2017.
Practical Dietary Recommendations
To achieve a low-acidity diet:
- Increase intake of fruits and vegetables daily.
- Choose plant-based proteins (like beans and lentils) over animal proteins.
- Limit consumption of meats, dairy, cheese, eggs, and processed foods.
- Opt for whole grains and minimize refined grains and ultra-processed foods Shea2016Storz2022Storz2022+4 MORE.
Conclusion
Diets high in fruits and vegetables and low in animal products and processed foods are associated with a lower dietary acid load. Adopting a plant-based or Mediterranean-style diet is an effective way to reduce dietary acidity and support better health outcomes Shea2016Carnauba2017Storz2022+6 MORE.
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