Protein damage - symptoms, diet and treatment of protein damage

Hypersensitivity to cow’s milk proteins represents one of the most prevalent forms of food allergy, primarily affecting infants and young children. Cow’s milk comprises a complex mixture of approximately thirty distinct protein fractions, several of which have the potential to trigger allergic immune responses. The principal allergens include casein—a micellar structural protein—as well as whey proteins such as β-lactoglobulin and α-lactalbumin. These components play a pivotal role in the pathogenesis of clinical symptoms, which may manifest as immediate IgE-mediated reactions or as delayed, cell-mediated immune responses [2].

Allergy to cow's milk protein in the vast majority of cases is transient. It decreases in the following years of life. The reason for this allergy progression is the acquisition of tolerance to a given product. Studies conducted in recent years show that in the 3rd year of life allergy still occurs in about 71% of children, at the age of 6 years, 50%, and after the 9th year, 28% [2]. However, it also happens that the protein stain does not disappear and its symptoms persist into adulthood.

Initial indications of an allergic response to proteins found in cow’s milk may emerge even during breastfeeding if the mother consumes dairy products that are subsequently transmitted through breast milk. Nevertheless, the vast majority of cases become apparent only after the introduction of cow’s milk-based infant formula [2]. The clinical manifestations of this protein intolerance can be categorized into two primary groups: gastrointestinal disturbances and cutaneous manifestations. Within the digestive system, the most frequently reported symptoms include recurrent regurgitation of gastric contents into the esophagus (gastroesophageal reflux), episodic infantile colic, frequent spitting up of feedings, vomiting episodes, and the passage of loose or semi-liquid stools with irregular consistency [3]. Dermatological signs primarily consist of small pustular lesions and localized erythematous patches, which are most commonly situated on the cheeks and in the retroauricular regions. Less frequently, though still observably, the rash may extend to the neck, thorax, abdomen, and both the upper and lower limbs. It is noteworthy that in certain instances, cutaneous symptoms may resolve spontaneously, while other complaints—particularly those affecting the respiratory system, such as chronic coughing or wheezing—begin to predominate. Additionally, the allergy may be accompanied by recurrent episodes of otitis media, further complicating the clinical presentation [4]. In some cases, the sole observable symptoms may be behavioral disturbances, including psychomotor hyperactivity combined with difficulties in maintaining focus, as well as heightened irritability and excessive crying in the infant. Such an atypical course significantly hinders accurate diagnosis and necessitates more meticulous observation alongside consultation with a pediatric specialist.

The management of symptoms associated with protein intolerance typically does not necessitate pharmacological intervention. In instances where the described ailments stem from an allergic reaction to cow’s milk protein, complete elimination of this component from the daily diet becomes essential. Should protein contamination lead to skin irritations or lesions, in addition to adhering to a strict elimination diet, the implementation of specialized skincare regimens aimed at epidermal regeneration is equally critical. Supplementation with probiotics—preparations containing live strains of beneficial microorganisms—may serve as a valuable adjunct in the therapeutic process. However, in cases of severe allergic reactions, such as those involving edema, respiratory distress, or anaphylactic shock, consultation with a medical specialist is indispensable, as they may deem it necessary to introduce appropriate pharmacotherapy.

Due to the elevated risk of allergic reactions to cow’s milk proteins, mothers are strongly advised—wherever feasible—to continue breastfeeding, as breast milk represents the optimal nutritional source for infants. However, if symptoms of protein intolerance persist in the child despite breastfeeding, the mother must eliminate all dairy products—and, where possible, meat—as well from her own diet, since allergens may be transmitted to the infant’s system via breast milk [4]. An elimination diet for children diagnosed with cow’s milk protein allergy necessitates meticulous planning and strict adherence to medical guidelines. For the youngest patients, extensively hydrolyzed milk substitute formulas are typically recommended, specifically designed for infants with confirmed cow’s milk allergy or those at high risk of developing such intolerance. Alternatively, hypoallergenic formulas—wherein proteins have undergone partial hydrolysis to significantly reduce their allergenic potential—may be employed [3]. A critical component of introducing new foods into a child’s diet is the gradual and monitored expansion of their meal plan, enabling parents to observe any adverse reactions. This approach facilitates the prompt identification and exclusion of potential allergens. In adults diagnosed with cow’s milk protein allergy, the cornerstone of treatment is an elimination diet, which involves the complete avoidance of problematic food components. This method serves as a causal therapy aimed at suppressing undesirable immunological responses triggered by allergen consumption [6]. It is noteworthy that cow’s milk protein allergy ranks among the most common allergic conditions in infants and young children. In the majority of cases, symptoms resolve spontaneously with age as the child’s immune system develops tolerance to the antigen. The most effective therapeutic strategy remains the rigorous adherence to dietary recommendations, which helps prevent health complications associated with allergic reactions.