The pH of Milk and Plant-Based Alternatives: Effects on the Body (2024)

Overview

Your body works constantly to keep a healthy balance. This includes balancing acidity and alkalinity, also known as pH levels.

Your body carefully controls the pH level of fluids such as blood and digestive juices.

Blood has a pH range of 7.35 to 7.45. This makes it slightly alkaline or basic.

Stomach acid has a low pH of about 1.5. This helps the stomach digest food and protects you from invading germs.

The pH scale ranges from 0 to 14:

  • 7: neutral (pure water has a pH of 7)
  • below 7: acidic
  • higher than 7: alkaline

The range may seem small. However, each pH level is 10 times greater than the next. This means that a pH of 5 is 10 times more acidic than a pH of 6 and 100 times more acidic than 7. Similarly, a pH of 9 is 10 times more alkaline than a reading of 8.

Your body is effective at keeping pH levels stable. Diet can temporarily shift your body’s overall pH level. Some foods may make it slightly more acidic. Other foods may help keep it alkaline.

But eating a balanced diet will not significantly impact pH levels if you’re otherwise healthy.

Milk is a popular beverage that is hotly debated in terms of pros and cons for your health. Alternative milks, such as nut milks or soy milk, are often touted for their health benefits over traditional dairy.

Read on to learn where these drinks fall on the pH scale and what you should know about how they affect your body’s balance.

A food doesn’t have to taste acidic or have a low pH to be acid-forming in the body. This is a popular misconception.

The nutrients, minerals, and vitamins in a food are what make it acid or alkaline forming. Too many acids in the body can cause health problems, especially if you have an underlying condition.

Eating low-acid foods may help conditions such as acid reflux or heartburn. A medical study from Japan found that eating more alkaline-forming foods appeared to be removing acids from the blood, which might have a beneficial effect on gout.

Eating more alkaline-forming foods such as fruits and vegetables may also help improve and maintain muscle mass. A study found that women who ate more alkaline-forming foods had less natural muscle loss due to aging.

This may be because these foods are high in minerals such as potassium that are important for muscle and bone health.

As a general rule, dairy (such as cow’s milk), meat, poultry, fish, and most grains are acid-forming foods. Most fruits and vegetables are alkaline-forming. A balanced diet should have more alkaline-forming foods.

This can be a little complicated, as a pH level below 7 doesn’t necessarily translate to an acid-forming substance. A prime example is lemons, which are acidic before digestion but contain alkaline-forming byproducts once broken down in the body.

Cow’s milk

Milk — pasteurized, canned, or dry — is an acid-forming food. Its pH level is below neutral at about 6.7 to 6.9. Remember, though, that the exact pH level is less important than whether it’s acid-forming or alkaline-forming.

Other dairy products like butter, hard cheeses, cottage cheese, and ice cream are also acid-forming. Yogurt and buttermilk are alkaline-forming foods despite having low pH levels between 4.4 and 4.8.

The American College of Healthcare Sciences notes that raw milk is also an exception; it may be alkaline-forming. However, it may not be safe to drink untreated milk.

Milk doesn’t taste acidic. It’s even thought to be a remedy for acid reflux or heartburn. Milk may temporarily help soothe symptoms. This is because the fat in milk helps to coat the esophagus (food pipe) and stomach.

However, drinking milk may cause more heartburn symptoms. Milk makes the stomach produce more acid, which may worsen stomach ulcers or interfere with healing.

Goat’s milk

Like cow’s milk, the pH of goat milk depends on how it’s treated. Raw goat milk is alkaline-forming in the body. However, most goat milk available in stores is pasteurized and acidic-forming.

Soy milk

Soy milk is made from soy beans, which are legumes. While most legumes are acid-forming foods, soy beans are neutral or alkaline. Usually, soy milk is alkaline forming in the body.

Almond milk

The American College of Healthcare Science’s food chart notes that almonds are an alkaline-forming food. Almond milk is also alkaline-forming. This beverage has many other benefits as well.

Coconut milk

Coconut milk’s effect on your body’s pH depends on how it’s made. Fresh coconut is alkaline-forming, while dried coconut is acid-forming.

Oat milk

Oat milk is made from oats and is acidic. Grains such as oats and oatmeal are acid-forming foods, even though they do have other benefits.

Cashew milk

Cashew milk is acid-forming. It’s made from cashew nuts. Most nuts, such as cashews, peanuts, walnuts, and pistachios, are acid-forming foods.

Your body needs both acid-forming and alkaline-forming foods. Eating a balanced diet helps you get all the nutrients you need for good health.

Choose healthy acid-forming foods such as fish, whole grains, lean meats, and dairy. Balance your diet with plenty of alkaline-forming vegetables and fruits.

Talk to your dietitian or nutritionist about the best balanced diet for you. If you have a health condition that can shift pH levels to be more acidic, such as diabetes, you may need more alkaline-forming foods.

This may include limiting milk and dairy products or switching to an alkaline-forming plant-based milk, such as soy milk or almond milk.

You can test your body’s acidity with pH or litmus paper. This test uses saliva or urine to give an approximate reading. The blue part of the paper will turn red if your body is acidic. The red part of the test will turn blue if your body is more alkaline.

Your pH level may change throughout the day. See your doctor to get an accurate pH test. This can determine whether your pH levels fall in normal ranges.

The pH of Milk and Plant-Based Alternatives: Effects on the Body (2024)

FAQs

What is the effect of pH on milk? ›

Heat stability of milk protein is greatly affected by milk pH. Alteration of milk pH prior to heat treatment affects the degree of association between denatured whey proteins and casein micelles (Ozcan et al.

What is the pH of milk alternatives? ›

Milk Alternatives: Exploring pH Beyond Dairy

Almond milk, for instance, tends to have a slightly alkaline pH, ranging from 7.2 to 7.6. On the other hand, soy milk and oat milk usually have a pH that is closer to neutral, hovering around 6.8 to 7.2.

What's the pH of milk and does it matter for your body? ›

Milk — pasteurized, canned, or dry — is an acid-forming food. Its pH level is below neutral at about 6.7 to 6.9. Remember, though, that the exact pH level is less important than whether it's acid-forming or alkaline-forming.

What does milk do to your pH balance? ›

The modern diet, and dairy product consumption, does not make the body acidic. Alkaline diets alter urine pH but do not change systemic pH. Net acid excretion is not an important influence of calcium metabolism. Milk is not acid producing.

Why is pH determination important in milk? ›

Firstly, measuring pH immediately following the collection of milk can identify if there is any compositional difference outside of the normal range, allowing for quick identification of conditions such as mastitis in cows.

How does milk affect stomach pH? ›

The fat in milk can aggravate acid reflux. But nonfat milk can act as a temporary buffer between the stomach lining and acidic stomach contents and provide immediate relief of heartburn symptoms."

Does milk alkalize the body? ›

Milk is presumed to be alkaline, although it actually comes in at between pH 6.5 and 6.7 which makes it slightly acidic Therefore, it can neutralize stomach acid to some degree but not as much as you might assume.

Which plant-based milk is alkaline? ›

Plant-Based Milks: Almond, Soy, and Oat

While the alkalinity of these milk alternatives may vary, they can be excellent choices for those seeking alkaline options that don't come from animals. Almond milk offers a creamy texture and a slightly alkaline flavor profile, while soy milk provides a good source of protein.

Does almond milk have high pH? ›

Sucrose-sweetened almond milk yielded the lowest pH (4.56 ± 0.66), followed by soy milk and bovine milk; the highest pH was with unsweetened almond milk (6.48 ± 0.5).

Is pH important in the human body? ›

The physiological pH of the human body is essential for many processes necessary to life, including oxygen delivery to tissues, correct protein structure, and innumerable biochemical reactions that rely on the normal pH to be in equilibrium and complete.

What is the best pH for humans to drink? ›

Pure water has a neutral pH of 7, however, the EPA, which regulates water quality, recommends drinking water with a pH level between 6.5 to 8.5. Water is the basic necessity for all living organisms.

Is higher pH good for you? ›

While this higher pH doesn't pose any health risks, it can cause skin to become dry, itchy and irritated. So, if you or your children are having any skin issues, the pH of your well water could be a reason. Many companies have advertised the benefits of alkaline water, that is, waters with pH levels greater than 8.5.

How to alkalize your body? ›

The alkaline diet basically reinforces good, old-fashioned healthy eating. The diet recommends eating more vegetables, fruits and drinking lots of water and cutting back on sugar, alcohol, meat and processed foods.

What are the symptoms of an unbalanced pH level? ›

When your body becomes too acidic (as in acidosis) or too alkaline (as in alkalosis), it can lead to symptoms that make it difficult to manage everyday activities. The exact symptoms will depend on the type of pH imbalance but can include sleepiness, fatigue, headache, loss of appetite, confusion, and vomiting.

What happens to milk as its pH changes? ›

Acidity increases as milk spoils. Unsoiled milk has a pH of approximately 6.7, and as the pH falls below 5, the protein in milk congeals and precipitates.

How does pH affect milk coagulation? ›

Milk coagulates spontaneously at various pH zones, insoluble casein salts being formed between pH 2.0 and 3.0, isoelectric casein at pH 4.7 and calcium caseinate at about pH 6.5. Optimum rennet coagulation is at about pH 6.0 coinciding with complete conversion of casein to paracasein.

What causes pH change in milk? ›

What causes the change in pH as the milk turns sour? A2. The lactose in the milk is converted to lactic acid. As the acid level increases the pH level drops.

How does pH affect milk curdling? ›

Milk's natural pH is about 6.5, just slightly acidic. If it approaches a pH of 5.5, the casein proteins lose their negative charge and the micelles no longer repel each other, meaning they start to gather in small clusters. At around pH 4.6, the scattered proteins bond to each other again and begin to curdle.

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