Negative effects of casein on health

The number of nutritionists or doctors who advise a rather punctual consumption of both milk as of its different Dairy Products , despite the fact that it was once considered an adequate product from a nutritional and dietary point of view. The reason is found mainly in the increasing number of people suffering from lactose intolerance (in the majority of the occasions still without knowing it, and that nevertheless present / display annoying symptoms when they consume milk), in the last published scientific studies that verify their not so healthy effects, and especially in the presence of casein , despite being considered one of the best proteins that we could consume due to its nutritional value and better digestion.

It is often thought that milk is a recommended food product, simply because we have been consuming it for a lifetime. However, as many nutrition experts say, in reality the only milk we should take is maternal. Moreover, in adulthood it would not be advisable at all, given that there are other more appropriate options when it comes to providing calcium and other essential nutrients to our body.

Effects of casein

Casein consists of milk proteins , which are found in micelles. When the milk coagulates, it separates into a semi-solid phase (casein), and another liquid phase where we find the serum. It is also known as a slow protein, taking longer to digest than whey protein. And, in short, it is the main protein found in milk.

The negative effects of casein for health

Increased mucus

When milk is digested, the various secondary products that appear as a consequence of the bacterial decomposition of casein tend to cause the appearance of a thick, sticky and dense mucus which sticks to the mucous membranes. Its cause? The lack of digestive mechanisms in our body useful for the correct decomposition of casein.

This thick mucus tends to seal the respiratory system , not working fluently. This consequence is related to respiratory diseases such as sinusitis, rhinitis and asthma, as well as pneumonia and otitis.

Exhausts our natural defenses

Casein is considered a highly immunogenic protein. This means that for its digestion it demands a high production of antibodies and other complements to our immune system, which can exhaust it.

Due we are more vulnerable to infections , it is also common for other allergic reactions . That is, the milk protein behaves in the same way as an antigen, being considered by our body as a foreign agent and reacts by producing antibodies as if it were an infectious agent.


A moderate and regular consumption of dairy products can cause related symptoms such as rheumatoid arthritis, chronic fatigue, otitis and intestinal alterations.

Kidney damage

As long as the kidneys function correctly, the consumption of casein in normal quantities does not usually cause problems, although in certain predisposed people it does. In fact , casein can cause kidney damage when there is already damage to the kidneys, as found in a study carried out in 2004.

In this study we examined the effects of casein in rats with kidney disease. It was discovered that only consuming 20% ​​of casein in a normal diet caused the rats to develop renal failure.

Milk allergy

In some people the casein of milk could trigger allergies , which appears when our organism identifies casein as a harmful substance or compound, releasing histamine in order to neutralize it.

In this sense, both milk whey and casein can trigger this allergic reaction, which usually arises with symptoms such as nasal congestion, skin rashes, itchy eyes, blisters, stomach pain and cramps, and in cases more serious an anaphylactic crisis.

Increases the risk of childhood diabetes

Different studies have found enough evidence to show that cases of childhood diabetes increase especially in families that consume more milk , as a consequence of the damage suffered in the pancreas by the cells of the Islets of Langerhans.

As we explained in one of the previous sections, in the presence of casein our immune system produces antibodies, creating them against natural proteins of our own organism. As a result, antibodies are produced against cells, tissues and molecules of the body.

Loading ..

Recent Posts

Loading ..