4 Questions About Dairy Answered

There are a lot of myths out there about food and dairy is no exception. How can we separate fact from fiction? We’ve enlisted the help of a few nutrition, health and animal science experts to tackle some of your burning questions about dairy. For more dairy facts check out this infographic and don’t forget to share your favorite dairy product with us in this poll!

Do hormones in milk cause early puberty?

If you are a woman, and especially a mom, you’ve likely heard that girls mature earlier and boys grow bigger because of hormones in milk (and meat). Girls are maturing earlier, but expert Dr. Ann Macrina notes that the age at which they reach puberty has been declining since the mid-1800’s, a time, incidentally, during which dairy consumption has actually decreased. (A report from the International Dairy Foods Association shows that the average person consumes about 20 gallons of milk annually – and that is a new record low.)

Our experts say there is no evidence that hormones in milk or dairy products play a role in early puberty and suggest that improved nutrition and increased obesity rates are more likely impacting early puberty.


According to Dr. Terry Etherton:

There are zillions of protein hormones in both plant and animal foods. They are digested in the stomach, which kills their ability to have any biological activity. There is just no way to come to a science-based conclusion that hormones in food or dairy products cause early puberty.

Can those who are lactose-intolerant drink milk?

As we age, some of us become more sensitive to lactose, the sugar found in dairy products. The consumption of more lactose than the body can break down can cause stomach bloating and intestinal discomfort, but avoiding dairy is not the answer to lactose intolerance, says expert Dr. Dennis Savaiano.


  • Lactose is broken down in the body by the enzyme lactase.
  • As we age, we typically produce less lactase because our bodies are genetically disposed to do so.
  • Lactose intolerance is a genetic trait that can impact approximately one in four American consumers and nearly three-fourths of the world’s population.
  • Lactose intolerance is different from a milk allergy, which is quite rare.
  • Dose is the key in managing lactose intolerance and drinking one cup (8 oz.) or less a day does not usually cause problems.
  • Drink milk with a meal to increase the digestion of lactose.
  • Lactose-free dairy products can be found at the grocery store to provide additional choices.

And Dr. Savaiano notes, “Regular milk drinkers (one to three small servings per day) have much better tolerance because they have adapted their intestinal bacteria to improve digestion of lactose.”

Does dairy cause weight gain?

If you’re trying to lose weight someone has likely suggested that you cut out dairy, because it is too fattening. Making good food choices plays a more important role in maintaining a healthy weight, say our experts. From yogurt to skim milk, dairy offers a variety of low-fat options that can work for a healthy diet.


  • Research indicates that lean protein is important to a healthy diet and healthy weight.
  • Dairy offers a variety of low-fat and lean protein options.
  • Following the U.S. Department of Agriculture MyPlate guidelines will help consumers make healthy, well-balanced food choices.

Registered Dietitian Connie Diekman says that consuming protein likely helps us feel full longer. She also recommends, “People should meet their nutritional needs by choosing foods they enjoy, including lean meat, fish, poultry, and low-fat/fat-free dairy. However, two-thirds of the diet should come from whole grains, fruits, and vegetables.”

Is organic milk is healthier than non-organic milk?

Studies show that consumers often perceive organic foods as more healthful than regular or non-organic versions. Associate Professor of Veterinary Preventative Medicine and Epidemiology, Wondwossen Gabreyes, says the case is not so clear-cut.


  • There is no nutritional difference between organic and non-organic milk. Each contains the same essential vitamins and nutrients.
  • Milk is tested and prohibited from market if it does not meet the government’s stringent safety and quality standards.

Expert Carl Winter points out that healthy food can be found in both organic and non-organic production systems. He notes, “Fortunately, consumers in the U.S. frequently have the choice between purchasing organic and conventional foods and make food purchasing decisions that reflect their values, concerns, and lifestyles. For optimal health, consumers should continue to eat a balanced diet that includes significant amounts of fruits, vegetables, and grains, regardless if such foods are produced by organic or by conventional practices.”



Originally published June 9, 2015 as “D is for Dairy.”

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