Crayfish on the label: how to read an allergen statement

Allergen information is easy to skip because it sits in small print, usually below the ingredient panel. It is also one of the most important parts of the label if you or someone in your household has a food allergy.

The JointsAid label declares that the product contains crayfish, a type of crustacean shellfish.

Why shellfish appears on joint supplements

Glucosamine, one of the listed ingredients, is commonly made from the shells of crustaceans such as shrimp, crab and crayfish. Because of that, many glucosamine products carry a shellfish warning.

The statement does not mean the capsule is a seafood product. It means the source material is relevant to people with a shellfish allergy.

How to read the statement

Look for a line that begins with the word Contains, often followed by the allergen names. Also check any warnings about facilities or shared equipment. These can appear in separate sentences, so read the whole block rather than only the first line.

If a label does not give the source of an ingredient and you have an allergy, treat that as a question to answer before you buy, not after.

Cross-contact and the words “may contain”

Some labels add a second kind of warning. A statement that a product was made in a facility that also handles certain allergens, or on shared equipment, points to the possibility of cross-contact. These statements are often voluntary and are worded in different ways, so it is worth reading them carefully rather than assuming their absence means anything.

Where a label gives no information on a point that matters to you, you can ask the company before you buy. A clear answer is a good sign, and a vague one tells you something too.

If you are buying for someone else

Allergies run in households, and it is easy to forget that a product you can take safely may not be suitable for a relative or a guest. If a bottle sits in a shared kitchen, keep it where it is clearly identified and out of reach of children.

If someone reacts

An allergic reaction can be serious. If a person has trouble breathing, swelling of the face or throat, widespread hives or feels faint after taking any product, call your local emergency number straight away. This article is general information and is not medical advice.

If you are unsure

Allergies vary from person to person, and this article cannot tell you whether a product is suitable for you. If you have a shellfish allergy, or you are not certain, speak to a doctor, allergist or pharmacist before taking a product that declares shellfish.

For questions about the product itself, you can write to customer@glycens.com.