Allergy Testing

Allergy Testing 
Immediate Allergies
Delayed Allergies
Dairy Allergy Testing
Allergy Symptoms Reference

Blood Testing

Normal vs. Healthy Ranges
Vitamin D Testing
Blood Testing

Digestive and Gastrointestinal Testing

Stool Blood Testing
Digestive Absorption Testing

Gluten Testing

Celiac Gluten Difference
Gluten Testing 
Celiac Disease Testing
Gluten-Free Diet

Hormone Testing

Male Hormone Testing
Female Hormone Testing

Neurotransmitter Testing

Neurotransmitter Testing

Toxic Metals Testing

Toxic Metals Testing



Digestive absorption involves the passage of digested food into the blood, lymphatic vessels, and tissue cells.

In a three-month period, two out of every three people have had some sort of digestive problem. It is the second leading reason next to the common cold that people seek the help of our Functional Medicine Doctors at Chicago Natural Health Care. What’s more, along with problems of digestive absorption, our gastrointestinal tract may be riddled with harmful disease-causing bacteria, as certain elements of our modern lifestyle (like frequent worldwide travel, for example) make us more vulnerable to such infections than ever before in history.


By testing your digestive absorption, our Functional Medicine Doctors at Chicago Natural Health Care can learn how your body digests the food that you eat, how your body rids itself of the waste left behind, and most importantly how all of that affects the normal functioning of your various bodily systems.


A digestive absorption test can provide us with insight into any of the following symptoms and conditions including:

  • thyroid function (i.e. heavy weight gain)
  • adrenal function (i.e. fatigue)
  • mood swings and depression
  • abdominal pain, indigestion, or chronic diarrhea
  • melatonin production
  • infertility and low-libido
  • menopause, peri-menopause, and andropause
  • and many others

For our digestive absorption testing, we use a Comprehensive Digestive Stool Analysis (CDSA) from a fully accredited medical lab.


The CDSA starts out by examining 3 different areas:

  • Digestion – checking for the presence of no less than a dozen common potential pathogens;
  • Absorption – checking levels of long- and short- chain fatty acids, cholesterol, common imbalanced flora, and fecal fat;
  • the Colonic Environment – checking the amounts of beneficial and other bacteria in one’s colon.


Beyond that, the CDSA can also be used to evaluate the following:

  • metabolism
  • immune status (and yeast levels) for patients with irritable bowel syndrome
  • indigestion, malabsorption, and other GI-related problems

There’s even a parasitology component that the doctor may order which uses EIA testing and microscopic evaluation to detect parasites in the gastrointestinal system, along with yeast, beneficial flora, imbalanced flora, pathogenic bacteria. The CDSA analyzes no less than 18 different factors affecting your gastrointestinal and greater overall health.

Your stool sample is collected and shipped to the lab in the privacy of your own home. Once your stool sample has been received, it will be analyzed carefully by trained and knowledgeable technicians backed by an assortment of powerful diagnostic technologies, including brand new staining procedures, advanced immunoassay techniques, and computer-enhanced video microscopy. Then, within just 7 to 21 days after submitting your stool sample for testing, our office will receive the results. We will review the results with you and carefully explain any results that fall outside of normal reference ranges (too low or too high), and their implications. And if further action is indicated, these test results will help us better able to develop a program that will work for you.

Click here to see more about our Stool Digestion Absorption Test and a sample report. To have stool or digestion absorption testing done, call Chicago Natural Health Care today at 773.418.6877 or click the button below.


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