Yeast Intolerance

What is Yeast Intolerance?

If you have an intolerance (defined by YorkTest as a food-specific IgG reaction) to yeast, your body produces an inflammatory response to yeast proteins present in foods and drinks consumed.

Yeast is a living fungus which is used as an active ingredient in many products, especially baked goods and alcoholic drinks. Bakers use yeast to make dough rise and brewers use yeast to ferment sugar to make alcohol.

If you have yeast intolerance, you might also experience reactions to mushrooms, truffles, blue cheeses and malt which all contain fungus. It is also a good idea to reduce your intake of sugary foods which can fuel the growth of natural yeasts in the body such as Candida (thrush).

Where to look

As well as being an integral ingredient within many products, yeasts can also occur naturally, growing on the skin of some berries and soft fruits. Being aware of the types of foods and drinks is important when making changes to optimise your diet. The following list of ingredients should be avoided if you have yeast intolerance:

  • Marmite
  • Dried fruit
  • Bread
  • Vinegar
  • Mushrooms
  • Gravy and stock cubes
  • Fermented drinks
  • Beers, wines and ciders
  • Ginger beer

Other Names

As an ingredient, yeast is often given other names which can make it difficult to identify on product packaging so it’s a good idea to familiarise yourself with these. The following names are also used for yeast and these ingredients should be avoided if you have yeast intolerance:

  • Hydrolysed protein
  • Hydrolysed vegetable protein
  • Leavening

Replacements for a balanced diet

To ensure you maintain a balanced diet which provides the B vitamins found in yeast, you can supplement your meals with a variety of alternatives such as:

  • Quinoa
  • Millet
  • Brown Rice

If you have found out that you are intolerant to yeast, changing your diet need not be daunting. YorkTest Nutritional Therapists are here to help you understand how to optimise your food choices.

Information provided above regarding Food Intolerance (defined by YorkTest as a food specific IgG reaction) is intended to provide nutritional advice for dietary optimisation. YorkTest recommend that you discuss any medical concerns you have with a GP before undertaking a YorkTest programme.