Probiotics may be important in the control of food allergies because of their ability to improve digestion by helping the intestinal tract control the absorption of food allergens and/or by changing immune system responses to foods. Probiotics may also be important in non-allergy types of food intolerance caused by imbalances in the normal intestinal flora.
Dose: 1–10 billion live bacteria daily.
According to one theory, allergies are triggered by partially undigested protein. Proteolytic enzymes may reduce allergy symptoms by further breaking down undigested protein to sizes that are too small to cause allergic reactions.
Dose: 1-2 capsules with meals
Hydrochloric acid secreted by the stomach also helps the digestion of protein, and preliminary research suggests that some people with allergies may not produce adequate amounts of stomach acid.
Dose: The amount of betaine HCl used varies with the size of the meal and with the amount of protein eaten. Typical amounts recommended by doctors range from 600 to 2,400 mg per meal.
Vitamin C is a natural antihistamine, and can help with the immune problems that some people with chronic allergies face.
Dose: 3-6 grams a day
Glutamine, an amino acid, is the preferred fuel for the cells of the gastrointestinal tract, which may be under constant attack when faced with food allergies. It can reduce intestinal permeability, which contributes to “leaky gut syndrome”. Glutamine may also play a role in supporting the immune system.
Dose: 2-4 grams a day
Nettles (Urtica dioica)
Nettles have long been used to treat respiratory allergies, and have an antihistamine effect.
Dose: 2-4 grams a day
Quercetin is a flavonoid found in fruits and vegetables. It is anti-inflammatory and can reduce the histamine reaction found in most seasonal allergies.
Dose: 400-500 mg three times a day
Sterol compounds from plants, naturally occurring fats also called phytosterols, have been shown to have significant activity in humans. It is a natural immune modulator, helping to provoke a stronger response of the T-helper cells, which are very active cells needed during some conditions, in particular chronic allergies and infections.
Dose: 100 mg three times a day, away from food and dairy products