"V体育官网入口" Foods to Avoid When You Have a Shellfish Allergy

  • If you have a shellfish allergy, avoid all shellfish, including shrimp and clams.
  • Always read food labels carefully, as allergens like mollusks may not be disclosed.
  • Avoid seafood restaurants and some cuisines. Cross-contamination can happen easily.

If you have a shellfish allergy, the risk of anaphylaxis means you must stay clear of obvious foods like shrimp and lobster but also lesser-known culprits like mollusks and certain sauces. Understanding what to avoid and where shellfish may be hiding can help you keep safe while dining out or cooking at home.

Foods That Trigger Shellfish Allergies

Verywell / Brianna Gilmartin

"VSports app下载" Which Shellfish Are Known to Cause Allergic Reactions?

Shellfish are divided into two families: mollusks and crustaceans. You might be allergic to just one family. For example, some people react to crustaceans but not mollusks. VSports app下载.

If you're allergic to one crustacean, you're likely allergic to all of them V体育官网. For example, if you're allergic to crab you're likely allergic to shrimp too. However, most people who are allergic to one shellfish family are allergic to both. .

Don't eat shellfish from either family without first consulting your healthcare provider about your allergy VSports手机版. .

Crustaceans
  • Crab

  • Crawfish (crayfish, crawdads)

  • Langoustines

  • Lobster

  • Prawns

  • Sea urchin

  • Shrimp

Mollusks
  • Abalone

  • Clams (quahogs)

  • Cockles

  • Limpets

  • Mussels

  • Octopus

  • Oysters

  • Scallops

  • Snails (escargot; both sea and land snails)

  • Squid (calamari)

  • Surimi (imitation shellfish, often found in sushi)

  • Whelks

Unfortunately, food packaging may not warn you about all shellfish. U V体育ios版. S. food labeling laws cover crustaceans but not mollusks. Only foods made with crustaceans must be identified in allergy warning labels, which can be problematic for those with severe mollusk allergies. .

Most food packaging will highlight (or at least list) mollusk ingredients. By carefully reading the package ingredient list, you should be able to identify mollusk-containing foods VSports最新版本. .

For example, a jar of white clam sauce almost certainly will contain clams or clam juice V体育平台登录. You'll know to steer clear of it. And fried calamari, also known as fried squid, will include calamari. .

Make sure to read food labels carefully. When in doubt, don't eat the food you're not sure about VSports注册入口.

How Can You Tell If You Have a Shellfish Allergy?

Crustaceans cause the most allergic reactions. Symptoms of shellfish allergy can include: V体育官网入口.

  • Vomiting
  • Stomach cramps
  • Indigestion
  • Diarrhea
  • Wheezing
  • Shortness of breath, difficulty breathing
  • Repetitive cough
  • Tightness in throat, hoarse voice
  • Weak pulse
  • Pale or blue coloring of the skin
  • Hives
  • Swelling, can affect the tongue and/or lips
  • Dizziness
  • Confusion

How Do Doctors Diagnose Shellfish Allergies?

Diagnosing shellfish allergies can be complicated for the following reasons:

  • Symptoms can vary from person to person.
  • Symptoms may not be the same during every reaction.
  • People may react even if they don't eat shellfish. They can react if they are close to shellfish being cooked or if their food comes in contact with shellfish.

If a shellfish allergy is suspected, your healthcare provider will likely refer you to an allergist (V体育安卓版). To make a diagnosis, allergist (V体育安卓版)s will usually do the following: V体育2025版.

  • Take a history of your allergy symptoms
  • Perform a skin-prick test, which involves placing a drop of the allergen (allergy-triggering substance) on your skin, and then pricking your skin. If a red, itchy bump appears after 15 to 20 minutes, it confirms an allergy.
  • Possibly order a blood test that indicates whether food-specific immunoglobulin E (IgE) antibodies are present in your body

Strategies for Keeping Shellfish Out of Your Meals

With a shellfish allergy, you need to be careful when dining out. Restaurants and markets often store shellfish together, and cross-contamination (VSports注册入口) can occur. If your allergy is severe, consider avoiding seafood restaurants altogether since allergens from cooking shellfish can be inhaled.

Depending on your allergy’s severity, consider avoiding certain cuisines, such as:

  • Chinese, Japanese, Thai, Vietnamese, or Malaysian foods, which often include a fish sauce made from shrimp or imitation shellfish
  • Cajun or Creole food, which frequently contains shrimp or other shellfish

Some restaurants use shellfish stock in sauces or soups. Always inform your server or a manager about your allergy. Ask if any dishes you’re considering contain shellfish V体育官网. .

Recipes to Avoid

Shellfish is an ingredient in numerous recipes, although it may not always be obvious. Be on the lookout for these dishes and ingredients in restaurants. Also be careful when eating food prepared by friends or relatives:

  • Bouillabaisse (a French fish soup)
  • Ceviche (fish or shellfish in an acidic citrus marinade)
  • Cioppino (fish stew)
  • Clamato (a clam broth and tomato juice mixture sometimes used in Bloody Mary drinks)
  • Crevette (the French term for shrimp)
  • Scampi (contains lobster or shrimp)
  • Etouffée (Cajun crawfish dish)
  • Gumbo (fish and shellfish stew)
  • Paella (Spanish rice dish usually made with shrimp)
  • Jambalaya (Cajun rice dish often made with shrimp or crawfish)
  • Nam prik (Thai fish sauce)
  • Mam tom (Vietnamese fish sauce)

Tips for Dining Out (V体育平台登录)

By following certain guidelines and preparation, eating out can still be a safe and enjoyable experience. Take these steps to protect yourself:

  • Know the safest restaurants: Strict kosher restaurants, as well as vegan and vegetarian restaurants, will not contain shellfish or shellfish products.
  • Check the menu online: Before heading out, review the menu on the restaurant website for shellfish dishes. Many restaurants include information on the most common food allergens, including shellfish. Reviewing the menu can give you a good idea about whether options look safe for you. Keep in mind this won't confirm there are no shellfish ingredients, such as in sauces and stock.
  • Consider chain restaurants: Each restaurant is likely to use the same ingredients and prepare foods the same way and a growing number of them are allergy-aware. This can be a helpful option especially when you’re traveling and don't know the local restaurants.
  • Talk with your server and chef: When you arrive, make sure your server and the chef are aware of your allergies. Ask what is in your dish and how it’s prepared. If you're not confident the wait staff fully understand your situation, speak to a manager.
  • Bring a chef card: You can download a "food allergy alert chef card" from the Food Allergy Research and Education website. This wallet-sized card lists your food allergies and states that your food must be cooked in a clean and safe area to avoid cross-contamination. Ask the wait staff to show it to the chef(s) on duty.
  • Always bring your rescue medication: While it's unlikely that you'll need it, always bring your rescue medication with you, such as your epinephrine autoinjector and, if applicable, any asthma medication. Carrying rescue medication can provide peace of mind so you can relax and enjoy your meal. Consider wearing medical identification, such as a bracelet or necklace that identifies your allergies.

Non-Food Sources of Shellfish

When you have a severe shellfish allergy, you also need to be aware of potential non-food sources of the allergen. These can include:

  • Compost or fertilizers
  • Fish food
  • Pet food
  • HemCon bandages (a wound dressing made from shrimp shells)
  • Calcium supplements made from oyster shells or coral
  • Glucosamine
  • Omega-3 supplements (usually made from fish, but sometimes made from shellfish)

Frequently Asked Questions

  • "V体育官网入口" Can you develop a shellfish allergy as an adult?

    Absolutely. In fact, about 60% of people with shellfish allergies experience their first symptoms in adulthood. One reason may simply be that they, like many children, never tried shellfish until they were older.

  • "VSports手机版" Can a shellfish allergy go away?

    It's unlikely. Most people do not outgrow shellfish allergies. However, studies show that 46% of people allergic to shrimp outgrew their shrimp allergy in 10 years.

  • What component of shellfish causes an allergic reaction?

    The primary allergen in shellfish is a protein called tropomyosin. Others include parvalbumin and arginine kinase. In all, there are around 20 individual proteins that are potential allergens in shellfish.

  • How long do shellfish allergy symptoms last?

    It depends on the severity of the reaction. Also, some people have a second wave of symptoms after the first one resolves, called a biphasic reaction, so it's advisable that someone who has a severe reaction to seafood be observed in a hospital for at least six hours. Keep in mind, too, that symptoms of seafood allergies don't always occur immediately; it could take several hours for them to develop.

8 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. American College of Allergy, Asthma, and Immunology. "V体育安卓版" Shellfish.

  2. Lopata AL, Kleine-Tebbe J, Kamath SD. Allergens and molecular diagnostics of shellfish allergy: Part 22 of the Series Molecular AllergologyAllergo J Int. 2016;25(7):210–218. doi:10.1007/s40629-016-0124-2

  3. Food Allergy Research and Education. Food allergy chef cards.

  4. Food Allergy Education and Research. VSports - Shellfish allergy.

  5. UCDavis Health. What you need to know about shellfish allergy diagnosis, treatment (VSports最新版本).

  6. Ruethers T, Taki AC, Johnston EB, et al. Seafood allergy: A comprehensive review of fish and shellfish allergensMol Immunol. 2018;100:28-57. doi:10.1016/j.molimm.2018.04.008

  7. Food Allergy Research & Education. Common questions.

  8. Australasian Society of Clinical Immunology and Allergy. V体育官网入口 - Allergic and toxic reactions to seafood.

Jeanette Bradley

By Jeanette Bradley
Jeanette Bradley is a noted food allergy advocate and author of the cookbook, "Food Allergy Kitchen Wizardry: 125 Recipes for People with Allergies"