Acidic foods are foods that increase the production of acid waste in the body during digestion, which is then eliminated through urine. Common acidic foods include grains, dairy products, animal protein, legumes, and processed foods that can affect dietary balance when eaten in excess.

Although acidic foods may sound harmful, they do not necessarily have an acidic pH and can be part of a healthy diet when consumed in moderation. Diets high in processed acidic foods and low in fruits and vegetables may be linked to a higher risk of conditions such as obesity, high blood pressure, and type 2 diabetes.

In contrast, alkaline foods like fruits and vegetables may help lower dietary acid load and support overall health. Knowing which foods are considered acidic foods, how they compare to alkaline foods, and how to include them in balanced meals can help support better eating habits.

List of foods

The most common acidic foods are:

1. Grains

Grains such as rice, couscous, wheat, corn, carob, buckwheat, rye, and cereal germ, as well as foods made from them, including bread, pasta, and cakes, are considered acid-forming. Their digestion produces acidic waste products in the body.

Although these foods play an important role in a balanced, healthy diet, they should be eaten in moderation, as excessive consumption may contribute to conditions such as diabetes, high blood pressure, or even certain types of cancer.

2. Milk and dairy products

Milk and dairy products like yogurt, cheese, and cream may increase dietary acid load during digestion. Even so, they can still be included in a balanced diet because they provide nutrients like calcium and protein, which are important for bone and muscle health.

The health effects of dairy depend on the type and amount consumed, as well as overall eating habits. For this reason, dairy products should be consumed in moderation as part of a varied and balanced diet.

3. Animal-based protein

Animal-based proteins, such as eggs, meat, fish, seafood, and poultry, can increase dietary acid load and make urine more acidic.

In excess, especially when they replace fruits and vegetables, they may raise the risk of uric acid kidney stones. According to the National Institute of Diabetes and Digestive and Kidney Diseases, adjusting the amount of animal protein in the diet may help prevent kidney stones in some people.

4. Legumes

Legumes such as beans, lentils, chickpeas, and soybeans can increase acidity and lower pH levels in the body during digestion.

Although they are considered slightly acidic foods, legumes are low in fat and rich in fiber, minerals, and protein. They should be eaten regularly but in moderate amounts.

5. Processed foods

Processed foods like mayonnaise, ketchup, chocolate, refined sugar, margarine, sausage, mortadella, soda, processed juices, and alcohol can increase the body’s acid load.

These foods are often high in saturated fat, sugar, and sodium, and according to the World Health Organization and the American Heart Association, eating too many highly processed foods may raise the risk of obesity, high blood pressure, type 2 diabetes, and heart disease. For this reason, they should be limited whenever possible.

Alkaline foods vs acidic foods

Unlike acidic foods, alkaline foods, such as fruits, vegetables, healthy plant fats, and herbs may help lower the amount of acid waste the body produces and removes through urine.

Eating too many acidic foods may increase this acid waste in the body. Over time, a diet high in processed foods and low in plant foods may also be linked to a higher risk of health problems such as high blood pressure and some chronic diseases.

However, there is no scientific proof that eating acidic foods changes the body’s overall pH. For more personalized advice, a registered dietitian can review your diet and help create a meal plan that supports your health goals.

Are fruits considered to be acidic?

Although most fruits have an acidic taste, they are generally classified as alkaline foods and can help reduce acidity in the body. However, certain fruits may aggravate gastrointestinal symptoms in people with stomach ulcers or GERD.

How to include acidic foods in your diet

Acidic foods can be part of a balanced diet, but it is best to focus on overall diet quality by eating plenty of fruits, vegetables, legumes, and other minimally processed foods while limiting heavily processed products.

When adding acidic foods to meals, natural options such as beans, lentils, eggs, yogurt, and milk can provide important nutrients. Highly processed foods such as refined sugar, packaged sauces, and other ultra-processed products should be limited whenever possible.

A diet rich in fruits, vegetables, and other plant foods provides vitamins, minerals, and antioxidants that support overall health. Although these foods may lower dietary acid load, there is no good scientific evidence that they change the body’s overall pH.

Healthy recipes

Acidic foods can be eaten daily as part of a balanced diet, especially when meals also include fruits, vegetables, and other minimally processed foods.

Examples of recipes that combine acidic and alkaline ingredients include:

1. Veggie omelet

Ingredients:

1 egg
50 g (about 1½ cups) spinach
30 g (about 1 cup) fresh mushrooms
3 cherry tomatoes
1 tablespoon of extra virgin olive oil
oregano and pepper to taste

Directions:

Beat the egg in a bowl, then add the chopped spinach, tomatoes, oregano, and pepper. Mix well.

Heat the olive oil in a frying pan over low heat and pour in the egg mixture. Cook for about 2 minutes, or until the bottom is set, then flip the omelet and cook for 2 more minutes.

2. Lentil salad