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I have heard a lot of good things about gluten-free diets over the years. But I was encouraged to look more into them after a certain professional tennis player started seeing amazing results with that approach. This diet may not be right for everyone but it can be a life changer for some of us.

A gluten-free diet is a diet that excludes foods containing gluten. Gluten is a protein complex found in wheat, barley, rye and triticale. A gluten-free diet is the only medically accepted treatment for celiac disease,

as explained on Wikipedia. If you happen to be on this type of diet or are interested in pursuing it, you don’t want to miss these gluten-free iPhone apps:

Gluten Free Registry: it has a database of gluten-free friendly restaurants, coffee houses, and other businesses. Covers 24,700+ business locations in North America at the time of this writing. The reviews and ratings are quite useful too.

ipiit: will guide you to find the right type of food for you based on your preferences and needs. It has a decent barcode scanner too. You can compare products, and find healthy alternatives to foods you are allergic too.

Allergy & Gluten Free Diet Tracker: use this to scan products to discover and avoid the ones that contain an allergen you are sensitive too. Users can share their findings with the community. Over 200k products are covered at this point.

Gluten Free Ingredients: useful for those suffering from gluten intolerance or Celiac disease. It includes a list of gluten free ingredients as well as items that could be harmful.

Healthy Diet & Grocery Food Scanner: another useful tool that shows you which foods match your diet needs. You can scan foods when shopping to find which ones you should avoid.

HealthyOut: displays healthy restaurants and foods that fit your personal preferences. It works fine for folks following gluten free, vegan, and vegetarian diets. This is a free application.

GF Overflow: a gluten free product search tool for iPhone and iPad. It covers over 9000 gluten-free products across a broad range of brands and categories.

Gluten Free: a free app that contains a list of ingredients that would fit in your gluten free diet.

Is That Gluten Free?:  it covers over 23k products from 510+ brands. You can search through products by brand, category, or product name. It is a bit pricey but quite helpful.

Gluten Less Dining: covers thousands of food items from some of the most popular restaurants and food businesses around. You can search through restaurants by price and type.

Your turn: what are your favorite gluten-free apps?