Digestive Disease

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The content of this article is from the book “The Comprehensive Guide to Glutathione”
by Dr. Jimmy Gutman MD FACEP

Glutathione as a dietary supplement.

We must first clarify an important, frequently misunderstood part of the glutathione story.

Upon learning about glutathione for the first time, many people go to their health store, buy it, and start dosing themselves. However, while glutathione is freely available in this form, this sort of oral, ingested glutathione will have negligible effects on your health. The product decomposes rapidly in the digestive system and is quickly removed from the gut. Apart from a few very specific instances, glutathione cannot be introduced into the body in this way. It must be made within your cells -which is where it’s naturally found. The effective way to stimulate the production of glutathione is to provide your body with the basic elements it needs to make glutathione by itself. Some pharmaceutical medications, such as N-acetyl-cysteine (NAC), have been developed to provide these precursors. There are also natural ways to increase glutathione levels, in particular the use of denatured (bioactive) whey proteins.

These are discussed throughout this website.

From the book “Glutathione Your Key to Health” Jimmy Gutman MD/Stephen Schettini

The digestive tract is a string of connected organs stretching from the mouth to the bowels. With it, we eat, digest, and eliminate waste. The many digestive disorders are caused by such factors as genetics, stress, toxins, infectious diseases, and pharmaceutical drugs. This chapter discusses the latest research on glutathione in the digestive tract.

Glutathione helps protect the mouth and salivary organs from periodontal disease, stomatitis and gingivitis and the esophagus from inflammation. In the stomach, it protects against gastritis, peptic ulcer and cancer, and in the liver, hepatitis and organ failure. Glutathione also defends the pancreas against inflammation and the large intestine (bowel) against colitis, inflammatory bowel disease, ulcerative colitis, Crohn’s disease, and cancer.


Gastritis is an inflammation of the stomach lining (gastric mucosa). Acute gastritis produces a short-lived inflammation with symptoms of pain, heartburn, occasional nausea, vomiting and loss of appetite. Chronic gastritis is more prolonged. It has fewer symptoms but more readily progresses to serious illnesses such as anemia, stomach ulcer and stomach cancer. As the population ages gastritis is becoming so common that some scientists consider it a part of the aging process.

One of many possible causes of gastritis is generalized stress. It may be a psychological reaction to daily life or be physically induced by trauma — the result of major illness, head injury or burns. A long list of toxins has also been implicated with this ailment, the most common ones being coffee, alcohol, tobacco, over-spiced foods and certain infectious diseases. Some common pharmaceutical drugs may also induce gastritis, notably aspirin, corticosteroids, and anti-inflammatory medications. Mixing these drugs may be especially damaging. Consult your physician before you use them in combination.


Stomach ulcers — also called peptic ulcers — are spots where the lining of stomach has been eroded leaving an open wound. This can vary in depth and may lead to an actual hole right through the stomach wall (a perforated ulcer). Most ulcers occur in the stomach or duodenum and are rarely found elsewhere along the digestive tract. About one in ten North Americans will suffer at some point in their life from an ulcer, leading to symptoms like those seen in gastritis — abdominal pain, heartburn, and even melena (black or maroon-colored stools caused by oxidized blood leaking into the digestive tract) and anemia (a low hemoglobin or red blood count) if the ulcer is bleeding.

Ulcers develop when the stomach lining loses its ability to protect itself from the acids produced in the digestive juices. This was once thought to be caused by high acid levels, but it is now known that many ulcer patients have normal acid levels. We know that for various reasons, the lining’s defense mechanism against these acids is insufficient, enabling ulcers to develop.

Several factors contribute to the protective nature of this lining. Mucus production, biochemical cellular barriers and adequate replacement of damaged mucosal cells all play roll in the maintenance of a healthy stomach. Immunological factors are only just now being understood. For example, they seem to explain why blood Type ‘A’ individuals are likely to develop stomach cancer whereas those with blood type ‘O’ are more prone to duodenal ulcers.

Many factors can disrupt the protective lining. Over-secretion or overproduction of stomach acids has already been mentioned. The same drugs that cause gastritis may also lead to ulcers, either by increasing acid production or by modifying the protective factors. These drugs include corticosteroids, aspirin, and dozens of anti-inflammatories known by various brand names.

As with gastritis, other risk factors include cigarette smoking, alcohol abuse, high caffeine intake, overindulgence in fatty foods and consumption of highly spiced foods like whole chili peppers. Even high-dose vitamin C (ascorbic acid) intake has been implicated with ulcers. Stress and anxiety have traditionally been identified as causes, but now seem less significant than previously thought.

Medical science has recently discovered an infectious agent involved with ulcer formation — the bacteria Helicobacter pylori, found in 70-90% of ulcer cases. A short course of antibiotics often but not always cures the infection. A significant portion of the population have H. pylori in their digestive tract yet never develop problems. Apparently, other immunological or physiological factors must come into play for this organism to become pathological.

Case study

Kurt was a 53 year-old vice-president of sales for a large manufacturing company. Among the seventy-hour weeks, two-martini lunches, coffees well into the night, a pack-and-a-half-a-day cigarette habit, and the stress of a poor sales quarter, he developed severe stomach pains. He was lucky. Medical investigation determined that he only had a gastritis (stomach inflammation) but that if his present lifestyle continued, he would likely develop an ulcer. Unwilling to quit smoking or working so much, he agreed to a reduction in alcohol and coffee and also to visit a nutritionist. After three weeks on silymarin, melatonin, glutamine, chamomile, selenium, multiple vitamins including B-complex, C and E, he felt “infinitely better,” even though sales were still down. He laughs about this now and is thinking of quitting smoking and starting regular exercise. He now believes that if he feels better in his body, his performance at work will improve.


Stomach cancer — gastric carcinoma — often begins at the site of a stomach ulcer. It is generally believed that that ulcers do not necessarily cause stomach cancer, but that this cancer is often preceded by a particular type of ulcer. In America, it is the seventh most common cause of cancer death. However, incidence of stomach cancer varies enormously around the world; in Japan, Chile, and Iceland, it is one of the most common causes of mortality. Scientists have suggested that this may be due to differences in diet or environment. The theory is supported by the fact that certain occupational hazards such as exposure to coal dust or heavy metals like mercury and lead increase one’s chances of contracting this disease.

Other risk factors include the consumption of certain types of prepared food and moulds. Moldy foods may include a carcinogen called aflatoxin. This by product of fungi can be found growing in nuts, seeds, corn and other dried foods.

The H. pylori bacteria have also been implicated in stomach cancer. Chronic gastritis (stomach inflammation) and polyps (abnormal protruding growth of tissue) may also become cancerous. These conditions as well as stomach ulcer, toxins like alcohol, tobacco, aflatoxins and foods that are barbecued, smoked, pickled and highly salted may all contribute to the development of cancer.


Glutathione’s ability to protect the stomach is being widely researched. Its therapeutic role is promising, and it has been shown to protect the stomach in several different ways. It is a primary shield against oxidative stress, detoxifies potentially harmful or even carcinogenic substances and mediates the immune mechanisms, ensuring a more effective immune response.


It has recently been shown that when the lining of the stomach faces a toxic challenge glutathione levels rise. Several groups of researchers demonstrated this using alcohol to provoke an anti-toxic response by the body. Low to moderate levels of alcohol led to an adaptive elevation in glutathione levels, but high levels of alcohol overwhelmed this system, causing subsequent damage. An even more direct clinical application of glutathione’s protective role in the stomach was brought to light by G.A. Balint in Hungary. His team studied an all-too common problem — the gastric side-effects of anti-inflammatory drugs such as indomethacin and piroxicam (Indocid, Feldene, etc.). Subjects given small amounts of glutathione or cysteine at the time of drug ingestion had significantly fewer side-effects. This is a great example of natural therapy and traditional medicine is used to complement each other.

The increase in free-radical damage and glutathione turnover is well known in patients suffering from chronic inflammation of the stomach lining (gastritis) and those carrying the bacteria Helicobacter pylori. Both of these conditions may progress to ulcer disease and probably increase the risk of stomach cancer.

Ulcer disease may also be caused in part by high levels of lipid peroxidation and disruption of the antioxidant defense mechanisms in the lining of the stomach. There is certainly a close relationship between G s H -dependent enzymes and the progress of gastric ulcers. Glutathione and its related enzymes are found in very low concentrations within the ulcer but often rise again when ulcerated tissues heal. When laboratory animals were given drugs to lower their glutathione levels, oxidative damage to the stomach lining (gastric mucosa) was significantly higher.

Traditionally, Helicobacter pylori-related ulcers are treated with antibiotics (Amoxicillin, Biaxin, Flagyl, etc.) and proton-pump inhibitors (Losec, Pantoloc, etc.). This treatment is more effective when used in conjunction with antioxidants. A new medication called Rebamipide developed in Japan works partly as a free radical scavenger. It also slows depletion of glutathione. Studies using Rebamipide along with conventional drugs show improved healing.

A Swiss group from the University of Zurich recently studied smokers suffering from ulcers. They combined conventional treatment with the potent glutathione precursor NAC (N -acetylcysteine), with good results. This is understandable since smokers in general suffer from much higher levels of oxidative stress than non-smokers and benefit more obviously from high antioxidant levels. Davydenko’s team in the Ukraine believe that antioxidant therapy should continue even after conventional treatment has stopped.

When we look at cancer cells in the stomach as well as the immediately surrounding normal cells, we find several recurring characteristics — cells are heavily damaged by oxidative stress, their antioxidant defenses are diminished and the power-plants of each cell (the mitochondria) are defective — possibly due to free radical damage. Notably, glutathione -related enzyme systems are impaired. Thereis little doubt that low glutathione levels go hand-in-hand with increased risk of cancer. The following research results speak for themselves.

T. Katoh at the National Institute of Environmental Health Sciences in North Carolina showed a particular relationship between glutathione levels and the development of gastric cancer. For various reasons, some people have inactive or inefficient sub-types of glutathione enzymes. They are at greater risk of contracting both stomach and bowel cancer.

A group from Italy studied glutathione levels in patients with stomach cancer and came to the unequivocal conclusion that the decrease of this tripeptide’ was ‘dramatical.’ Their work suggests that any therapeutic approach should include glutathione precursors such as cysteine.

A Japanese team reached similar conclusions while investigating gastric ulcers. They found that levels of gastric mucosal glutathione ‘are closely related to the etiology and course of gastric ulcer.’ Various researchers and theorists have suggested that the antioxidant capacity of the cancerous tissues has been impaired and, even more significantly, that the body’s entire antioxidant defense mechanism may be breaking down.


The pancreas is an organ involved in several important functions, the two most crucial are to secrete digestive enzymes that help prepare food for intestinal absorbtion and to produce hormones such as insulin and glucagon that are critical to the metabolism of sugars and carbohydrates.

Pancreatitis is an inflammation of the pancreas that leads to pain (often severe), and digestive and metabolic abnormalities. It can be potentially life-threatening and if chronic may lead to other illnesses like diabetes. Acute pancreatitis is an abrupt onset of pancreatitis most commonly caused by blockage of the passage to the intestines. This usually happens when stones are lodged there, or sometimes at the site of a tumor. The pancreatic juices contain powerful digestive enzymes that may back up when blocked and start to digest the pancreas itself.

Other causes of acute pancreatitis include certain viral and bacterial infections, specific drugs, high fat levels in the blood including cholesterol or triglycerides (hyperlipidemia), abdominal trauma, and critically low blood pressure (severe hypotension). Chronic pancreatitis develops over months or years, usually after repeated bouts of acute pancreatitis. The most common trigger by far for this type is alcoholism. Chronic pancreatitis may impair normal functions such as insulin secretion and lead among other potential problems to secondary diabetes.

Many studies suggest that oxyradicals and free radicals are involved in the development of all types of pancreatitis. The importance of glutathione in the pancreas’ antioxidant defense cannot be overstated. J.M. Braganza and his team at the Royal Infirmary in Manchester, UK, have found glutathione depletion in all early stages of acute pancreatitis. They surmise that low levels may predict the vulnerability of other organs to pancreatitis. M.H. Schoenberg from the University of Ulm in Germany suggests that glutathione supplementation may be a way to avoid extra-pancreatic complications.

Other researchers at the Royal Infirmary developed the’Manchester oxidant stress hypothesis’ to describe the development of pancreatitis. They think that oxidant stress (caused mainly by toxins) opens the door to chronic pancreatitis because diminishing glutathione levels allow the eventual breakdown of cells. This team developed a combination of antioxidants: methionine, vitamin C and selenium and tested them in placebo controlled and retrospective cross-sectional trials.

At Germany’s University of Dusseldorf Luthen’s team used oxothiazolidine carboxylate (OTC)-a potent glutathioneenhancing drug-to reduce the severity of pancreatitis. They found critical glutathione  loss in biliary pancreatitis (blockage due to a gallstone), and believe that when anti-oxidative defenses are weak, glutathione  depletion triggers early activation of auto-digestive enzymes. Walling considers glutathione  depletion a key factor when external toxins cause chronic pancreatitis.

The most common cause of chronic pancreatitis is alcoholic pancreatitis. Sufferers are particularly deficient in levels of vitamins E and A, selenium and glutathione peroxidase. Researchers have suggested that these patients needed higher daily requirements to ward off such oxidative stress.

Another variety of this disease is hereditary pancreatitis-an inherited disease that was examined at the Cleveland Clinic Foundation.

A correlation was found between the disease and diminished antioxidant defenses, most notably glutathione, selenium and vitamin EThe researchers at Cleveland proposed that supplementation therapy with natural products would decrease the frequency of attacks.The main complication leading to death from pancreatitis is multiple organ failure. Here, the integrity of cell membranes breaks down, leading to leakages both into and out of these cells. Wang and his team at Sweden’s Lund University successfully used NAC (N-acetylcysteine, a drug) to prevent damage to most tissues. Gukovsky at the University of California also found that NAC led to significant improvement in acute pancreatitis patients.

Oxothiazolidine carboxylate (OTC) — a potent glutathione -enhancing drug — was raising drug, to prevent damage to most tissues. I. Gukovsky at the University of California, also found significant improvement in acute pancreatitis patients using NAC.


Inflammatory bowel disease occurs in several forms, including ulcerative colitis and Crohn’s Disease, both described here.


Colitis is a general term for inflammation of the bowel. Ulcerative colitis (UC) is a chronic inflammatory disease of the large bowel (colon) leading to ulcers in the mucous membranes lining it and causing pain, bloody diarrhea, gas, bloating and many other symptoms. Fever, weight loss, joint pains and even visual symptoms may accompany the digestive problems.

Most patients develop this disease early on in life, usually between the ages of 15 and 30. This disease ranges in severity from a single brief attack to a progressive course complicated by severe blood loss (hemorrhaging), perforated bowel or the spread of infection into the bloodstream (sepsis). Ulcerative colitis patients bear a higher risk of subsequent colon cancer. However the ulcerative colitis is rarely fatal and the majority of those affected lead fairly normal lives.

The cause of this disease is still unclear but it has a small tendency to run in families. Various possible causes have been proposed, including infectious agents, immunological abnormalities, dietary factors, toxins, allergies and stress. However, these hypotheses remain unproven.

The large and small intestines are located in the lower abdomen like a loosely-folded fire hose that leads a long and winding path from the stomach to the anus. Ulcerative colitis is marked by the formation of ulcers that eat away at the intestinal wall. Crohn’s Disease is an inflammation that leads to swelling and tenderness in the intestinal wall. .

Case study

28 year-old Debbie, a massage therapist, had ulcerative colitis but had sofar managed to avoid any surgery. She maintained a sensible diet, continued the medications her doctor had prescribed, and avoided foods that disagreed with her. However, the previous few years had been fraught with repeated bouts of cramps, diarrhea, and occasional bloody stool. Eventually, she could not make it through her workday without numerous visits to the washroom. A dietary consultant added to her diet a high-dose antioxidant mixture, selenium, L-glutamine, and — when her stool was firmer — psyllium husks. Her blood loss has abated, and she now visits the washroom at lunchtimes only.


Crohn’s disease (CD) is similar in many ways to ulcerative colitis (see above). Its differences, however, make this a potentially more severe disease. In ulcerative colitis small ulcers are scattered in the lining of the large bowel. Crohn’s disease is less selective and may affect any part of the digestive system, from mouth to anus. It is most common in the ileum (the end of the small intestine where it joins the large intestine). The disease occurs in heavy patches, but areas between these diseased patches are also mildly affected. It is most common in the gut where the intestine wall may grow extremely thick following repeated inflammation. Deep ulcers may pass right through the lining and completely penetrate the gut tissues.

With repeated or prolonged inflammation of the intestine the entire thickness of the intestinal wall becomes affected. The thickening of the wall may narrow the intestinal passage and obstruct it. Symptoms can include spasms of abdominal pain, diarrhea, appetite loss, anemia and weight loss. Elderly are more prone to inflammation of the rectum. Young and old alike may suffer from chronic abscesses, deep fissures (cracks) and fistulas (abnormal passageways) in the anus. Because the entire digestive system is susceptible, complications are more profound than those following ulcerative colitis. They include bowel obstruction, infection, malabsorption, and elevated cancer risk — as much as 20 times greater than healthy individuals.

Like ulcerative colitis, the exact cause of Crohn’s disease is unknown, but there tends to be a stronger familial tendency. Some researchers think this may also be an autoimmune disease. Studies suggest that sufferers may benefit by avoiding certain food additives, allergens and cigarettes.


It is clear from observing patients with inflammatory bowel disease that inflamed cells in the lining of the intestines are a hotbed of free radicals. However, there is still debate as to whether the free radicals cause or result from the damage characterizing these diseases. Samples of tissue inflamed by ulcerative colitis and Crohn’s disease show consistent evidence of severe oxidative stress. The degree of oxidative damage can even be correlated to the degree of inflammation. Of all the antioxidants that can prevent or retard this damage, glutathione is the central one.

Researchers from all over the world — including L. Bhaskar from India and G.D. Buffington from Australia have looked at tissues affected by inflammatory bowel disease and Crohn’s disease. All have identified a significant depletion of glutathione and alteration of its enzymes. In the past, most researchers believed that glutathione depletion was more likely to be a consequence of ongoing inflammation and oxidative stress than a contributing cause of the problem

But today, opinions may be changing. More recent findings by B. Sido of the University of Heidelberg in Germany have found not only diminished glutathione levels but also diminished activity of the enzymes involved with glutathione production. This implies that declining glutathione production may actually contribute to the development of the disease.

Antioxidant therapy has thus emerged as a treatment for inflammatory bowel disease. One of the more traditional groups of medications applied to these diseases are the aminosalicylates (sulfasalazine, Asacol, Dipentum, etc.). These are potent antioxidants, but are also pharmaceutical drugs, and the hunt for less toxic, more natural products is on.

T. Cruz and J. Galvez and their team from the University of Granada in Spain, were able to protect inflamed bowels with a flavonoid called rutoside — flavonoids are a variety of crystalline compounds found in plants. This worked with both acute and chronic disease. They explained their success by pointing to rutoside’s tendency to maintain or increase glutathione content in the gut.

Malnutrition results more often from Crohn’s disease (CD) than from ulcerative colitis. reasons are complex but are summarized by the fact that CD is more deeply involved in the bowel. Nutritional status of those suffering from this disease has been investigated at great length and reveals a generalized glutathione depletion throughout the body. Findings have also been reported in children with CD, possibly resulting from ongoing oxidative stress.

Numerous scientists have suggested oral glutathione supplementation as a treatment for UC and CD. It is clear from the information we presented in Chapters 1 and 4 that oral glutathione is not very effective in raising total body glutathione. However, these digestive tissues seem able to make use of locally supplemented glutathione. The tissues most positively affected by oral glutathione are those in direct contact with it. Intestinal lining (mucosa) provides such an opportunity. In fact, Alton Meister — often called the father of glutathione research — suggests that both oral glutathione and glutathione excreted in the bile can protect the intestinal mucosa from injury. Experimental depletion of gut glutathione leads to severe damage of this sensitive lining.



Research evidence suggests that glutathione defends the stomach lining against various threats, including toxins, oxidative stress and carcinogenesis. results have prompted others to seek ways to raise glutathione levels in humans for both preventive and curative purposes. Elevated glutathione levels may protect against gastritis, ulcer and cancer and can certainly complement conventional treatments for these diseases.


The high levels of oxidative stress and the depletion of glutathione in pancreatitis is well documented and scientists are investigating the role of antioxidant therapy in the treatment of pancreatitis and prevention of recurrent bouts. Even though antioxidant therapy is a safe complementary treatment for chronic pancreatitis, its wider adoption as a standard healthcare tool will take time. The lynchpin of this new approach is the search for tools to enhance (modulate) intracellular glutathione levels. As these tools emerge, further research will be needed to use them effectively.


An imbalance in the formation of free radicals and a poor supply or availability of antioxidant micronutrients may cause or encourage tissue injury in inflammatory bowel disease. Levels of glutathione and its related compounds are significantly lower in these diseases. Different antioxidants including glutathione, glutathione monoesters, NAC (N-acetylcysteine), vitamin C (ascorbate), vitamin E (tocopherol), SOD (superoxide dismutase) and others have been used with varying success. It may not be clear whether glutathione loss is a cause or consequence of these inflammatory disorders, but in either case, they are positively affected by therapies that raise or sustain glutathione levels. Recent research suggests that raising glutathione levels may be a novel approach to the treatment of ulcerative colitis and Crohn’s disease.

Two types of inflammatory bowel disease

The most common cause of chronic pancreatitis is alcoholic pancreatitis. Sufferers of this disease are particularly deficient in levels of vitamins E and A, selenium, and glutathione peroxidase. Researchers have suggested that these patients required higher daily requirements to ward off this oxidative stress.

Another variety of this disease is known as hereditary pancreatitis, an inherited disease which was examined at the Cleveland Clinic Foundation. A correlation was found between the disease and diminished antioxidant defenses, most notably glutathione, selenium, and vitamin E. relationships among these three antioxidants are described in Chapters 1 and 4. The researchers at Cleveland propose supplementation therapy with natural products to decrease the frequency of attacks.

The major complication leading to death from pancreatitis is multiple organ failure is partly because the integrity of cell membranes breaks down, leading to leakages both in and out of these cells. X.D. Wang and his team at Lund University in Sweden successfully used N-acetylcysteine, a potent glutathione.

Drugs NAC and OTC can raise glutathione levels, but their effects are short-lived. These pharmaceutical drugs also have little nutritional value. Whey proteins have excellent nutritional value but usually lack glutathione precursors. The ideal source of dietary cysteine should be natural, nutritional, bioactive, and undenatured and As many of you are aware, whey protein, especially whey protein isolates (over 90% protein), are sometimes referred to as the “perfect” proteins because they contain all the essential amino acids required for your body’s protein synthesis.

The use of glutathione supplementation fights all kind of diseases from respiratory to auto immune to degenerative diseases.

Without question, the best type of preventive medicine is an optimized immune system, and a critical means to optimize it is by feeding it glutathione.

This is not the same glutathione that you see at the health food store. This is glutathione precursor. It’s very different because glutathione must be made inside your cells and the precursor is the food your cells   require to make its own glutathione as nature intended. That is the most natural and effective approach to boost your immune system.

It’s all natural with NO side effect. 

Want to know if this is for you? 

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Just send me a text here 703-895-0496 with the hashtag “sample” and I will send you a form to fill out, so I know where to send it.

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