Thursday, March 13th, 2014
Despite FDA warnings against drinking unpasteurized, “raw” milk, some parents continue to choose it for their families, citing a number of health claims including that it is a gentler alternative for lactose intolerant people. A new study published in the Annals of Family Medicine has found, however, that no such link with lactose intolerance exists. More from Time.com:
Only a small population of people drink unpasteurized milk, also known as “raw” milk, but its increasing popularity has some medical groups concerned. Some raw milk advocates argue that it’s healthier for us since raw milk contains no antibiotics or hormones, while others say it’s better for people with lactose allergies. For its part, the FDA advises against drinking raw milk, which can contain bacteria from fecal matter and sometimes be fatal, and has long stated that it doesn’t help with lactose intolerance.
But a new study published in the Annals of Family Medicine is definitively poking holes in the allergy theory, by reporting that lactose-intolerant people have the same symptoms from raw and pasteurized milk.
Advocates for raw milk claim that it contains good bacteria that can help with lactose absorption. “When I heard that claim it didn’t make sense to me because, regardless of the bacteria, raw milk and pasteurized milk have the same amount of lactose in them,” said study author Christopher Gardner, a professor of medicine at the Stanford Prevention Research Center in a statement. “But I liked the idea of taking this on since it seemed like a relatively straightforward and answerable question because the symptoms of lactose-intolerance are immediate.”
The study was small, with only 16 lactose-intolerant participants. All 16 tried three different types of milk–raw, pasteurized, and soy–over multiple eight-day periods.
For eight days, the participants were randomly assigned to one of the three milks, and they drank an increasing amount of that milk as the study period went on. They then reported their allergy symptoms, which were usually gas, diarrhea, and cramping, and rated them on a scale of 0 to 10. Their breaths were also measured for hydrogen, which can indicate undigested lactose in the colon and intolerance.
After the first eight days of drinking one type of milk, the participants took a week off where they drank no milk, and then started up again with another eight days of a different type of milk. To mask which type of milk participants were drinking, researchers randomized the order and added sugar-free vanilla syrup. Soy, which doesn’t contain lactose, acted as the control.
Researchers found no differences in the hydrogen breath tests between consuming pasteurized or unpasteurized milk. Participants also rated their symptom severity the same, regardless of the type of milk they drank.
Image: Milk, via Shutterstock
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Tuesday, December 3rd, 2013
The age at which a baby is offered her first solid food may affect the likelihood that she develops food allergies later in childhood, according to new research by British scientists. Breastfeeding exclusively for 4-6 months, then introducing solid foods while still breastfeeding, the researchers found, is the best way to prevent food allergies from developing. More from The New York Times:
British researchers followed a group of 1,140 infants from birth to 2 years, while their mothers completed diaries detailing the babies’ diets and noting suspected allergic reactions to food, which researchers later confirmed by testing. They found 41 babies with confirmed food allergies, and compared them with 82 age-matched healthy controls. All were born between January 2006 and October 2007.
After controlling for birth weight, the duration of pregnancy, maternal allergies and many other factors, they found that 17 weeks was the crucial age: babies who were introduced to solids before this age were significantly more likely to develop food allergies.
The study, published online in Pediatrics, found that continuing to breast-feed while introducing cow’s milk also had a protective effect against allergies. The authors suggest that the immunologic factors in breast milk are what provide the advantage.
The researchers advised that mothers who are not breastfeeding also wait until after 17 weeks to introduce solids.
Learn how to make fresh baby food at home with our helpful guide. Then, download our charts and checklists to keep track of Baby’s important info.
Image: Baby food, via Shutterstock
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Thursday, March 8th, 2012
A new food allergy treatment could allow children to safely consume foods that once would have been life-threatening, researchers at Johns Hopkins University and Duke University are hoping.
The scientists are testing whether “sublingual therapy,” in which tiny amounts of the allergenic substance–such as milk–are placed under the patient’s tongue, could desensitize the body enough to allow it to move on to “oral immunotherapy,” in which the patient swallows small amounts of the substance. In experiments, kids who did sublingual therapy before oral immunotherapy had better results.
CNN.com reports, however, that the treatment plan needs to be carefully honed to minimize the chances of triggering serious allergic reactions in children:
The results suggested that children who went through a year of sublingual therapy followed by one to two years of oral immunotherapy were less likely to have significant allergic reactions when undergoing the oral immunotherapy. Still, it did not eliminate all symptoms.
This is particularly important, because about 20% of the kids that [Dr. Robert] Wood [of Johns Hopkins] and colleagues work with have significant reactions during the treatment that make the therapy unfeasible, Wood said.
Some participants have shown they can safely eat milk products up to a year after stopping the therapies, Wood said. But only one-third have longterm protection. Others need regular exposure to milk in order to maintain protection against allergic reactions.
“With milk that’s not too hard,” Wood says, because one could “eat pizza a couple of times a week.”
Image: Boy drinking milk, via Shutterstock.
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