Leche
Al parecer la leche de vaca no es nada sana:
Fuente: http://onlinelibrary.wiley.com/doi/10.1 … x/abstract
Milk consumption: aggravating factor of acne and promoter of chronic diseases of Western societies
Consumption of cow’s milk and cow’s milk protein result in changes of the hormonal axis of insulin, growth hormone and insulin-like growth factor-1(IGF-1) in humans. Milk consumption raises IGF-1 serum levels in the perinatal period, adolescence and adulthood. During puberty with the physiological onset of increased secretion of growth hormone, IGF-1 serum levels increase and are further enhanced by milk consumption. IGF-1 is a potent mitogen; after binding to its receptor in various tissues, it induces cell proliferation and inhibits apoptosis.
The milk-induced change of the IGF-1-axis most likely contributes to the development of fetal macrosomia, induction of atopy, accelerated linear growth, atherosclerosis, carcinogenesis and neurodegenerative diseases. Observations of molecular biology are supported by epidemiologic data and unmask milk consumption as a promoter of chronic diseases of Western societies.
Fuentes: http://www.ncbi.nlm.nih.gov/pubmed/22393172 y http://ajcn.nutrition.org/content/77/2/504.long
El estudio Vitamin D, Calcium, and Dairy Intakes and Stress Fractures Among Female Adolescents, publicado el pasado mes de marzo en la revista científica Archives of Pediatrics & Adolescent Medicine, concluye que ni el calcio ni el consumo de lácteos está asociado a un descenso del riesgo de producirse fracturas de hueso. Estos mismos resultados se obtuvieron en la investigación Calcium, vitamin D, milk consumption, and hip fractures: a prospective study among postmenopausal women de la American Society for Clinical Nutrition que, tras analizar a más 72.000 mujeres, descubrió que las consumidoras de leche no eran menos propensas a sufrir fracturas de caderas que el resto..
Parece que la leche de vaca no es la mejor fuente de calcio.
Cow’s milk proteins (CMPs) are among the best characterized food allergens. Cow’s milk contains more than twenty five different proteins, but only whey proteins alpha-lactalbumin, beta-lactoglobulin, bovine serum albumin (BSA), and lactoferrin, as well as the four caseins, have been identified as allergens. Aim of this study was to investigate by proteomics techniques cow’s milk allergens in human colostrum of term and preterm newborns’ mothers, not previously detected, in order to understand if such allergens could be cause of sensitization during lactation. Term colostrum samples from 62 healthy mothers and preterm colostrum samples from 11 healthy mothers were collected for this purpose. The most relevant finding was the detection of the intact bovine alpha-S1-casein in both term and preterm colostrum. Using this method, which allows direct proteins identification, beta-lactoglobulin was not detected in any of colostrum samples. According to our results bovine alpha 1 casein that is considered a major cow’s milk allergen is readily secreted in human milk: further investigations are needed in order to clarify if alpha-1-casein has a major role in sensitization or tolerance to cow’s milk of exclusively breastfed predisposed infants.
Cow dairy is one of the most common allergens in the U.S. Babies are no exception to this rule. Milk is often viewed as an essential staple food for kids. We have been told over and over again that we need dairy for calcium, and although dairy does contain calcium, there are many other foods rich in calcium as well.
Today’s modern dairy comes from genetically tampered with cows. The casein in the dairy from these cows is resistant to digestion and has been linked to autoimmune disease. The casein from these cows for many causes the same types of symptoms we see gluten cause. This same type of casein is one of the most common dairy based protein allergies known.