Johns Hopkins Researchers Found a New Approach for Chronic Fatigue
In a Nutshell
Johns Hopkins researchers found that high-dose oral sodium cromolyn (800–2400 mg daily) rapidly reversed severe chronic fatigue, post-exertional malaise, and autonomic dysfunction in patients with mast cell activation syndrome (MCAS), including a bed-bound teen and a mother requiring a wheelchair. The non-absorbable drug stabilizes intestinal mast cells, reducing food-triggered inflammation, brain fog, and systemic symptoms when standard diets and supplements fail. Clinicians recommend titrating cromolyn upward as bridging therapy until underlying triggers can be addressed, noting its excellent safety and the potential to restore normal function within months.
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Johns Hopkins University published a study demonstrating that patients' lives were literally changed using sodium cromolyn. Two notable cases included a teenager who was so ill due to fatigue, nervous system dysfunction, and autonomic dysfunction that he had to stay lying down most of the day and drop out of high school, and a mother who was unable to care for her children because she was suffering from a disability due to fatigue, long-term COVID, and mast cell activation syndrome. Both individuals, after a few months of using sodium cromolyn, were able to return to their normal functions.
The compound sodium cromolyn (also known as cromolyn) reduces the reactivity of mast cells in the intestines. When taken as a food or dietary supplement that causes adverse reactions such as bloating, abdominal distension, reflux, leaky gut, brain fog, or joint pain, the immune system drives this reaction. Mast cells are central to this organization. Cromolyn coats the lining of the digestive tract and is non-absorbable, which is beneficial in this case. As it passes through the digestive system, it has a calming effect by reducing mast cell reactivity in the intestines.
This effect is crucial because environments and lifestyles lead to gradual immune system malfunction. Some people cannot fully treat chronic inflammatory and immune conditions using dietary changes, lifestyle changes, and nutritional supplements alone. People who have tried every imaginable diet from vegetarianism to fasting to carnivoreism and taken large amounts of supplements still suffer from inflammation and food allergies.
Cromolyn is derived from the khella plant (Ammi visnaga), a herb from the Middle East that has been used medicinally for centuries. Its active compound is known as khellin. When this acetyl is concentrated, it produces an over-the-counter (OTC) version of cromolyn as a nasal spray, or a prescription (RX) version that is either a capsule or a liquid ampoule.
The diagnosis that may be missed in many cases is mast cell activation syndrome, in which the immune system essentially suffers from post-traumatic stress disorder and reacts to everything, releasing tremendous amounts of inflammation.
A 16-year-old boy, formerly a healthy football player, had signs and symptoms of fatigue, asthma, muscle pain and weakness, malaise after exertion (which occurs after exceeding a certain limit of exercise or activity), and facial flushing. Before using cromolyn, his quality of life was poor. At first, he could only attend school every other day, but his condition worsened after that. He could only sit upright for 10 to 20 minutes a day, which is why he had to leave school. After responding to cromolyn, his post-exercise malaise improved. He was able to sit upright all day, leave the house, drive for two hours, attend social events again, walk normal distances, and returned to school.
Another case was a 41-year-old woman with a history of chronic asthma, runny nose, and Raynaud's disease, who was previously active as a runner exercising regularly. After about 4 weeks of a possible, though not confirmed, COVID infection, she suffered from severe and debilitating fatigue, positional intolerance, mental fog, and malaise after exertion even with minimal activity. She was mainly confined to the house and needed a motorized wheelchair for outdoor activities. Doctors at Hopkins diagnosed her with chronic fatigue syndrome, mast cell activation syndrome, and long COVID. Her response was a marked improvement in fatigue. She became able to be more present and an active caregiver to her family. She was able to resume normal exercise and activity and essentially regained her normal functions.
Doctors at Johns Hopkins used higher doses than usual. The standard dose is 800 mg daily, usually given as 200 mg 30 minutes before each meal and 30 minutes before bedtime. Given the seriousness of these cases and preliminary research looking into cromolyn at higher doses, knowing it is much safer at much higher doses, the doctors used doses as high as 1600 mg daily (double the usual dose) or even 2400 mg daily (triple the usual dose).
The Hopkins paper states: "Doses of 1600 to 2400 mg daily were well tolerated in patients for whom the standard daily dose was not effective. This draws attention to the option of increasing the dose for patients with mast cell activation syndrome (MCAS) who have not fully responded to the standard daily dose."
Most research on cromolyn uses the standard dose of 800 mg total daily dose. This includes conditions such as systemic mastocytosis, leading to improvements in digestive function, sensitivity, and cognition. Other research covers food-induced allergic rhinitis or runny nose, atopic dermatitis, chronic prostatitis and chronic pelvic pain syndrome, and idiopathic nephrotic syndrome.
Emerging research uses higher doses than usual. Two studies show benefit in cases of food allergies and food intolerance. A study involving 20 patients with irritable bowel syndrome who suffered from food intolerance compared placebo to cromolyn at a dose of 2000 mg daily. The findings showed an 83% response rate and a 52% reduction in symptom scores at higher doses.
Cromolyn may not need to be taken forever if underlying causes or primary triggers of the immune system are addressed. However, this may be easier said than done because patients are often exhausted and highly reactive and sensitive. If there is an underlying trigger such as infection, but the individual cannot tolerate treatment for this infection, then cromolyn can act as bridging therapy that allows for tolerance of treatment for the underlying cause.
An example from clinical practice involves a patient who had previously experienced mold in her home. Mold is a powerful stimulant for mast cells. She had been out of that environment for some time but still suffered from poor memory, fatigue, bloating, hives, itching, sinus congestion, mucus in her throat, numbness and tingling in her hands and feet, inflammation, joint pain, anxiety, and insomnia with hot flashes. She was diagnosed with a mold-related sinus infection. Treatment began with a gentle approach using a nasal irrigation bottle with saline solution to which N-acetylcysteine (NAC) was added. Two days later, she reported such a severe headache that she was about to vomit and had to stop. This illustrates how cromolyn can be used as a nasal spray using the over-the-counter version known as Nasalcrom to calm reactivity, allowing treatment of the underlying cause.
Cromolyn has a low rate of adverse reactions or side effects. The most common reactions to the oral form are headache, diarrhea, nausea, abdominal pain, skin rash, and irritation. These reactions are usually transient and temporary. Cromolyn may cause in some cases and in some individuals a temporary worsening of symptoms before an improvement occurs. For this reason, it is standard practice to gradually increase the dose or titrate the cromolyn dose. These fleeting interactions are relatively minor and easy to deal with and overcome.
The greatest density of immune cells in the entire body is found in the digestive system, which is another reason why the gut is an integral part of overall health and well-being. Cromolyn can be used as complementary or bridging therapy to treat the underlying cause. For those needing help, seek a skilled and well-trained doctor in the field of MCAS or Mast Cell Activation Syndrome.
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