- Reduce factors that promote bacterial overgrowth and low stomach acid.
- Replace stomach acid, enzymes and nutrients that aid digestion and are necessary for health.
- Restore beneficial bacteria and a healthy mucosal lining in the gut.
- Reduce factors that promote bacterial overgrowth and low stomach acid
Carbohydrates
As we saw in Part II and Part III, a high carbohydrate diet promotes bacterial overgrowth. Bacterial overgrowth - in particular H. pylori - can suppress stomach acid. This creates a vicious cycle where bacterial overgrowth and low stomach acid reinforce each other in a continuous decline of digestive function. It follows, then, that a low-carb (LC) diet would reduce bacterial overgrowth. To my knowledge there have only been two small studies done to test this hypothesis. The results in both studies were overwhelmingly positive. The first study was performed by Professor Yancy and colleagues at Duke University. They enrolled five patients with severe GERD that also had a variety of other medical problems, such as diabetes. Each of these patients had failed several conventional GERD treatments before being enrolled in the study. In spite of the fact that some of these patients continued to drink, smoke and engage in other GERD-unfriendly habits, in every case the symptoms of GERD were completely eliminated within one week of adopting a very low carbohydrate (VLC) diet. The second study (PDF) was performed by Yancy and colleagues a few years later. This time they examined the effects of a VLC diet on eight obese subjects with severe GERD. They measured the esophageal pH of the subjects at baseline before the study began using something called the Johnson-DeMeester score. This is a measurement of how much acid is getting back up into the esophagus, and thus an objective marker of how much reflux is occurring. They also used a self-administered questionnaire called the GSAS-ds to evaluate the frequency and severity of 15 GERD-related symptoms within the previous week. At the beginning of the diet, five of eight subjects had abnormal Johnson-DeMeester scores. All five of these patients showed a substantial decrease in their Johnson-DeMeester score (meaning less acid in the esophagus). Most remarkably, the magnitude of the decrease in Johnson-DeMeester scores is similar to what is reported with PPI treatment. In other words, in these five subjects a very low carbohydrate diet was just as effective as powerful acid suppressing drugs in keeping acid out of the esophagus. All eight individuals had evident improvement in their GSAS-ds scores. The GSAS-ds scores decreased from 1.28 prior to the diet to 0.72 after initiation of the diet. What these numbers mean is that the patients all reported significant improvement in their GERD related symptoms. Therefore, there was both objective (Johnson-DeMeester) and subjective (GSAS-ds) improvement in this study. It's important to note that obesity is an independent risk factor for GERD, because it increases intra-abdominal pressure and causes dysfunction of the lower esophageal sphincter (LES). The advantage to a low-carb diet as a treatment for GERD for those who are overweight is that LC diets are also very effective for promoting weight loss. I don't recommend VLC diets for extended periods of time, as they are unnecessary for most people. Once you have recovered your digestive function, a diet low to moderate in carbohydrates should be adequate to prevent a recurrence of symptoms. An alternative to a VLC is something called a "specific carbohydrate diet" (SCD), or the GAPS diet. In these two approaches it is not the amount of carbohydrates that is important, but the type of carbohydrates. The theory is that the longer chain carbohydrates (disaccharides and polysacharides) are the ones that feed bad bacteria in our guts, while short chain carbohydrates (monosacharides) don't pose a problem. In practice what this means is that all grains, legumes and starchy vegetables should be eliminated, but fruits and certain non-starchy root vegetables (winter squash, rutabaga, turnips, celery root) can be eaten. These are not "low-carb" diets, per se, but there is reason to believe that they may be just as effective in treating heartburn and GERD. See the resources section below for books and websites about these diets, which have been used with dramatic success to treat everything from autism spectrum disorder (ASD) to Crohn's disease. Another alternative to VLC that I increasingly use in my clinic is the Low FODMAP diet. FODMAPs are certain types of carbohydrates that are poorly absorbed by some people, particularly those with an overgrowth of bacteria in the small intestine (which, as you now know, tends to go hand-in-hand with heartburn). See this article and my book for more information. Be careful to avoid the processed low-carb foods sold in supermarkets. Instead, I suggest what is known as a "paleolithic" or "primal" approach to nutrition.Fructose and artificial sweeteners
As I pointed out in Part II, fructose and artificial sweeteners have been shown to increase bacterial overgrowth. Artificial sweeteners should be completely eliminated, and fructose (in processed form especially) should be reduced.Fiber
High fiber diets and bacterial overgrowth are a particularly dangerous mix. Remember, Almost all of the fiber and approximately 15-20% of the starch we consume escape absorption. Carbohydrates that escape digestion become food for intestinal bacteria. Prebiotics, which can be helpful in re-establishing a healthy bacterial balance in some patients, should probably be avoided in patients with heartburn and GERD. Several studies show that fructo-oligosaccharides (prebiotics) increase the amount of gas produced in the gut. The other problem with fiber is that it can bind with nutrients and remove them from the body before they have a chance to be absorbed. This is particularly problematic in GERD sufferers, who may already be deficient in key nutrients due to long term hypochlorydria (low stomach acid).H. pylori
In Part III we looked at the possible relationship between H. pylori and GERD. While I think it's a contributing factor in some cases, the question of whether and how to treat it is less clear. There is some evidence that H. pylori is a normal resident on the human digestive tract, and even plays some protective and health-promoting roles. If this is true, complete eradication of H. pylori may not be desirable. Instead, a LC or specific carbohydrate diet is probably a better choice as it will simply reduce the bacterial load and bring the gut flora back into a state of relative balance. The exception to this may be in serious or long-standing cases of GERD that aren't responding to a VLC or LC diet. In this situation, it may be worthwhile to get tested for H. pylori and treat it more aggressively. Dr. Wright, author of Why Stomach Acid is Good For You, suggests using mastic (a resin from a Mediterranean and Middle Eastern variety of pistachio tree) to treat H. pylori. A 1998 in vitro study in the New England Journal of Medicine showed that mastic killed several strains of H. pylori, including some that were resistant to conventional antibiotics. Studies since then, including in vivo experiments, have shown mixed results. Mastic may be a good first-line therapy for H. pylori, with antibiotics as a second choice if the mastic treatment isn't successful.- Replace stomach acid, enzymes and nutrients that aid digestion and are necessary for health
HCL with Pepsin
If you have an open-minded doctor, or one that is aware of the connection between low stomach acid and GERD, ask her to test your stomach acid levels. The test is quite simple. A device called a Heidelberg capsule, which consists of a tiny pH sensor and radio transmitter compressed into something resembling a vitamin capsule, is lowered into the stomach. When swallowed, the sensors in the capsule measure the pH of the stomach contents and relay the findings via radio signal to a receiver located outside the body. In cases of mild to moderate heartburn, actual testing for stomach acid production at Dr. Wright's Tahoma clinic shows that hypochlorydria occurs in over 90 percent of thousands tested since 1976. In these cases, replacing stomach acid with HCL supplements is almost always successful. Although testing actual stomach acid levels is preferable, it is not strictly necessary. There is a reasonably reliable, "low-tech" method that can be performed at home to determine whether HCL supplementation will provide a benefit. To do this test, pick up some HCL capsules that contain pepsin or acid-stable protease. HCL should always be taken with pepsin or acid-stable protease because it is likely that if the stomach is not producing enough HCL, it is also not producing enough protein digesting enzymes.
Note: HCL should never be taken (and this test should not be performed) by anyone who is also using any kind of anti-inflammatory medication such as corticosteroids (e.g. predisone), aspirin, Indocin, ibuprofen (e.g. Motrin, Advil, etc.) or other NSAIDS. These drugs can damage the GI lining that supplementary HCL might aggravate, increasing the risk of gastric bleeding or ulcer.
To minimize side effects, start with one 650 mg capsule of HCL w/pepsin in the early part of each meal. If there are no problems after two or three days, increase the dose to two capsules at the beginning of meals. Then after another two days increase to three capsules. Increase the dose gradually in this stepwise fashion until you feel a mild burning sensation. At that point, reduce the dosage to the previous number of capsules you were taking before you experienced burning and stay at that dosage. Over time you may find that you can continue to reduce the dosage, or you may also find that you may need to increase the dosage.
In Dr. Wright’s clinic, most patients end up at a dose of 5-7 650 mg capsules. In my experience, this dose is too high for many people. In fact, some have trouble with even a single 650 mg capsule. I’ve also found that the addition of cholagogues (agents which promote bile flow from the gall bladder into the small intestine) and pancreatic enzymes can help tremendously, especially in the initial stages.
For these reasons, I created by own combination of HCL and enzymes called the AdaptaGest Duo. AdaptaGest Core contains acid-stable protease (to support protein digestion and complement HCL), cholagogues, and enzymes. AdaptaGest Flex contains HCL, but in a lower dose (200 mg per capsule) than is typical for standalone HCL products. This allows better fine-tuning of your HCL dosage. In my clinic, I prescribe AdaptaGest Duo for anyone struggling with heartburn and other digestive issues related to low stomach acid production. If you’d like to try it, you can order it here.
Bitters
Another way to stimulate acid production in the stomach is by taking bitter herbs. "Bitters" have been used in traditional cultures for thousands of years to stimulate and improve digestion. More recently, studies have confirmed the ability of bitters to increase the flow of digestive juices, including HCL, bile, pepsin, gastrin and pancreatic enzymes. [1. Wright, Jonathan M.D. Why Stomach Acid is Good For You. M Evans 2001. p.142] Unsurprisingly, there aren't many clinical studies evaluating the therapeutic potential of unpatentable and therefore unprofitable bitters. However, in one uncontrolled study in Germany, where a high percentage of doctors prescribe herbal medicine, gentian root capsules provided dramatic relief of GI symptoms in 205 patients. The following is a list of bitter herbs commonly used in Western and Chinese herbology:- Barberry bark
- Caraway
- Dandelion
- Fennel
- Gentian root
- Ginger
- Globe artichoke
- Goldenseal root
- Hops
- Milk thistle
- Peppermint
- Wormwood
- Yellow dock
- Restore beneficial bacteria and a healthy mucosal lining in the gut