Home
>
Nutrition
>
A Look at Lactose Intolerance

A Look at Lactose Intolerance

Lactose is the primary carbohydrate in milk. Cow's milk contains 4-5% lactose, whereas human milk contains almost twice that amount. Lactose provides 30-50% of the energy in milk, depending on the fat content (skim vs. homogenized). A number of individuals are affected by lactose in the diet, but there is a difference between intolerance and maldigestion.

Lactose maldigestion is "a disorder characterized by reduced digestion of lactose due to the low availability of the enzyme lactase." Lactose intolerance is "the term for gastointestinal symptoms (flatulence, bloating, abdominal pain, diarrhea, and 'rumbling in the bowel') resulting from the consumption of more lactose than can be digested with available lactase." In other words, intolerance refers to the symptoms of the maldigestive disorder caused by an insufficient enzyme required to hydrolyze lactose to galactose and glucose.

Genetic defects often cause a deficiency of lactase, as well as injuries to the mucosa lining of the intestines or with age (as we age our enzyme levels decrease). When lactose molecules remain in the intestine undigested, they absorb water and this can cause bloating, discomfort, cramping, diarrhea, and nausea. Bacterial fermentation along the intestinal tract that produces lactic acid and gas is also a characteristic of lactose intolerance.

It is estimated that one in three adults suffer from lactose maldigestion and it appears to be inherited in about 80% of the world's population, including most Greeks, Asians, and Africans.

Those who suffer from any discomfort after eating or drinking milk products can consume foods labeled lactose free or take an enzyme preparation such as Lact-Aid to aid digestion. Do note, however, that lactose intolerance varies and the amount of lactose allowed in a diet depends on an individual's tolerance. Some people cannot tolerate milk, ice cream, or creamed foods, but they can eat aged cheeses and yogurt (some brands are better tolerated than others) without difficulty. Lactose products include:

Grain Products: Breads and muffins made with milk, pancakes, and waffles; cake or cookie mixes, pie crusts made from butter or margarine, French toast, some dry cereals, and biscuits.

Fruits and Vegetables: Canned and frozen fruits or vegetables processed with lactose, buttered, creamed, or breaded vegetables.

Milk and Milk Products: Milk (dried, evaporated, nonfat, and whole), yogurt, ice cream, sherbet, cheese, custard, puddings, and whey and casein proteins manufactured with lactobacillus/acidophilus culture.

Meat and Meat Alternatives: Meats, fish, or poultry creamed or breaded, sausage and other cold cuts containing nonfat-milk solids, some peanut butter, and omelets and souffl?s containing milk.

Other: Instant coffees, margarine, dressings, sugar substitutes containing lactose, toffee, chocolate, creamed soups, butter, cream, some cocoas, caramels, chewing gum, some vitamin-mineral supplements, some drugs, peppermint, and butterscotch.

Since calcium is a major component of many lactose-containing foods, it is vital that individuals who are lactose-intolerant receive adequate calcium from other foods (in fact, milk is not an ideal source of calcium, as will be discussed in Chapter Seven). These include almonds, brazil nuts, caviar, kelp, canned salmon, canned sardines, shrimp, soybeans, and turnip greens, broccoli, strawberries, and leafy greens. Leafy greens are currently under suspicion as a viable calcium source since greens are now believed to contain certain calcium binding agents that prevent calcium absorption.

You may publish this article in your newsletter, on your web site, or other publications, so long as the article's content is not altered and the resource box is included. Add byline and active link. Notification of the use of this article is appreciated, but not required.

Brian D. Johnston is the Director of Education and President of the I.A.R.T. fitness certification and education institute. He has written over 12 books and is a contributing author to the Merck Medical Manual. An international lecturer, Mr. Johnston wears many hats in the fitness and health industries, and can be reached at info@exercisecertification.com. Visit his site at info@exercisecertification.com for more free articles.

green cleaning service Park Ridge ..

In The News:

Your home address is easily accessible on people finder sites, putting you at risk for stalking and identity theft, but data removal services can help protect your personal information.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents

Robot combat evolves at Unitree's Iron Fist King event as G1 robots face off in China, featuring knockouts, precise strikes and agile machines that can perform side flips.

Take control of your digital privacy with actionable tips like Facebook privacy checkup, location tracking management and data removal services to protect your personal information.

Smart TVs and streaming devices manufactured in China are being compromised by BadBox 2.0 malware before users even power them on; infections have been detected in 222 countries.

The lightweight, 15-pound Tenniix tennis robot mimics pro playing styles like Nadal and Federer, using AI trained on 8,000 hours of professional tennis data.

Oak Ridge's uranium enrichment facility supports America's AI ambitions amid concerns that China's aggressive nuclear reactor construction could give it an edge in powering data centers.

Facebook scam ads now leverage AI and deepfakes to create convincing celebrity endorsements, targeting specific demographics with sophisticated schemes.

Apple unveils iOS 26, macOS 26 Tahoe and iPadOS 26 with translucent Liquid Glass design at WWDC 2025, featuring ChatGPT integration as competitors advance rapidly.

The Atom Touch prosthetic arm combines an AI neural interface with EMG sensors, allowing amputees to control individual fingers with precision at an affordable $25,000.

Aspen officials aim to have crews on the scene within five minutes — something they say would be nearly impossible without precise location data the AI technology gives.

Tech expert Kurt “CyberGuy" Knutsson says iPads are usually secure, but hackers can access them. Spot warning signs early to protect your data.

Tech expert Kurt Knutsson reveals how to easily move photos and videos off your iPhone or Android to securely protect your favorite moments.

The Social Security Administration is launching digital SSN access this summer. Tech expert Kurt “CyberGuy" Knutsson helps you learn how to use it and protect your identity.

Glide underwater with CudaJet and make the ocean your playground. Kurt “CyberGuy" Knutsson discusses the redesigned tech that might be your next big thrilling adventure.

Protect yourself from login alert scams with five security steps, including avoiding suspicious links, checking account activity and enabling two-factor authentication

Skip the usual Father's Day gifts with personalized ideas for tech enthusiasts, home brewers, pool owners, seniors, outdoor lovers and privacy-conscious dads.

DMV text scam alert: Fraudsters impersonating motor vehicle departments nationwide are sending threatening messages about unpaid tickets and tolls to steal your information.

Fox News' AI Newsletter brings you the latest on this rapidly evolving technology.

E-BAR, MIT's mobile robot, provides physical support for seniors with handlebars that follow from behind, helping prevent falls while maintaining dignity for aging adults.

AI is changing everything – now, we can even use it to generate video. I tried OpenAI's Sora and Google's Veo – here's how they measure up against each other.

Five simple phone setting tweaks that make your device work harder for you, from automatic text message deletion to scheduled focus modes.

Android users can save time with 10 simple automations, including automatic battery saver mode, location-based Wi-Fi settings and scheduled "Do Not Disturb" mode.

Personal information from 364,000 people was compromised in a LexisNexis data breach that went undetected for months, highlighting privacy risks.

The Phantom 3500 jet features a windowless design that reduces drag and structural weak points, burning 50% less fuel than conventional business jets.

A Look at Lactose Intolerance

Nutrition