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Is There More Lactose in Hot Milk Than Cold?

by
author image Kirstin Hendrickson
Kirstin Hendrickson is a writer, teacher, coach, athlete and author of the textbook "Chemistry In The World." She's been teaching and writing about health, wellness and nutrition for more than 10 years. She has a Bachelor of Science in zoology, a Bachelor of Science in psychology, a Master of Science in chemistry and a doctoral degree in bioorganic chemistry.
Is There More Lactose in Hot Milk Than Cold?
A glass of milk, whether it's cold or warm, will give you gastric problems if you're lactose intolerant. Photo Credit AntoniaLorenzo/iStock/Getty Images

If you're lactose intolerant, it's understandable that you would want to find ways to include milk in your diet while minimizing your risk of uncomfortable digestive side effects that accompany dairy consumption. Although a cup of warm cocoa can look very tempting, you probably resist the urge to indulge for fear of getting too much lactose. Actually, heating milk breaks down some of the lactose -- unfortunately not enough to lessen your gastric symptoms.

Lactose

Lactose is the sugar in milk and other dairy products. It's a carbohydrate, putting it in the same nutrient category as table sugar, fruit sugar and starch. You can use it to provide energy, just as you can use other carbohydrates for this purpose. Further, you can store its components in the form of the carbohydrate glycogen for later energy use, and if you consume too much, you can convert its components into fat, Dr. Lauralee Sherwood explains in her book "Human Physiology."

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Lactose Intolerance

Although most people don't need to pay attention to the lactose in food, many are concerned about it because they can't digest it. For those who are lactose intolerant, consuming dairy products causes uncomfortable digestive symptoms, including bloating and diarrhea. If you're lactose intolerant, you don't produce enough of the lactase enzyme, which breaks down milk sugar in your diet.

Hot Milk

Heating milk can actually break down some of the lactose to its component sugars, glucose and galactose, Drs. Reginald Garrett and Charles Grisham explain in their book "Biochemistry." This is especially true if you heat the milk for a long time. Unfortuately, the breakdown isn't enough to prevent symptoms.

Options

If you're looking to limit the amount of lactose in your diet, it's better to rely on proven alternatives to regular dairy consumption instead of trying to change the lactose in your milk by changing the temperature. You can use a lactose-free milk, or you can take lactase supplements, which will provide you with a temporary supply of the lactase enzyme, though they won't permanently affect your intolerance.

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References

  • “Human Physiology”; Lauralee Sherwood, Ph.D.; 2004
  • “Biochemistry”; Reginald Garrett, Ph.D. and Charles Grisham, Ph.D.; 2007
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