Recommended Free Tools
For packaged foods regulated by the U.S. FDA, read the complete ingredient list, then check any nearby Contains statement and any separate advisory warning such as “may contain milk.” Check the exact package every time you buy it. If the label does not resolve your concern, do not buy the snack until you have asked the manufacturer or distributor named on the package.
Read the full ingredient list first
Find the ingredient statement and read every item. An allergen’s food-source name may appear as part of an ingredient’s common name, in parentheses after an ingredient, or in a separate Contains statement. For example, FDA label examples include “buttermilk,” “whey (milk),” “lecithin (soy),” and “flour (wheat).” A highlighted box or front-of-package claim is not a substitute for checking the full list.
FDA’s consumer guidance says the food-source name must be declared at least once in the ingredient list or in a qualifying Contains statement. Read both when present; the Contains statement does not make the ingredient list unnecessary. See the FDA’s label-reading guidance.
Check the Contains statement and advisory wording separately
Contains identifies allergens used as ingredients
A Contains statement is generally placed immediately after or next to the ingredient list and identifies major allergens used as ingredients. Check that the named allergen is one you need to avoid, and still read the ingredients for other relevant details.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →#1 Best Overall
- IDENTIFY WHICH FOODS MAY BE CAUSING YOUR SYMPTOMS. Food intolerances happen when your gut microbiome and digestive enzymes can’t break down a food ingredient. Although gluten and lactose are the most common issues, intolerances can happen with any food item. When these intolerances go unchecked, symptoms like headaches, gas, diarrhea, acne, and bloating may develop.
- TESTS 800 COMMON FOOD ITEMS. Our food intolerance test for adults and children covers 14 major food categories: dairy, vegetables, fruits, grains, meats, seafood, nuts, sweeteners, spices, fats, oils, mushrooms, superfoods, and preservatives.
- HOW IT WORKS. (1) Register your test kit on the 5Strands website or mobile app (2) Collect 10-15 strands of hair. (3) Send your sample to our certified lab using the included prepaid shipping materials. (4) Once your sample is received, we’ll email you the results within 4 days. After 60 days, your hair sample will be permanently disposed of.
- EASY TO READ RESULTS. Each food item is labeled as Insignificant, Mild, Moderate, or Severe to help guide your elimination plan. This gives you clear directions to begin removing severe intolerance foods, moderate your intake of mid-level triggers, and keep safe foods in rotation to support gut health, digestion, and symptom relief.
- 3RD PARTY STUDIED & DOCTOR RECOMMENDED. 5Strands is the only intolerance and sensitivity test independently validated through third-party research. Every sample is processed in our certified U.S. lab using a double-pass method for accurate results, and our testing has helped over 345,000 people and pets uncover their food intolerances and environmental sensitivities.
May-contain warnings address possible unintended presence
Wording such as “may contain milk” or “produced in a facility that also uses milk” is a voluntary advisory about possible unintended allergen presence, including cross-contact. It is different from a Contains declaration for an allergen used as an ingredient. FDA says these warnings are voluntary, should be truthful and not misleading, and do not replace preventive manufacturing practices. Because manufacturers do not all use them, the absence of an advisory warning is not a guarantee that cross-contact is impossible. The warning also does not give a quantified amount or establish an individual safe threshold. FDA explains these distinctions in its food allergy guidance and industry guidance.
Know which allergens U.S. rules cover
For FDA-regulated foods, the nine major food allergens are:
Rank #2
- IDENTIFY FOOD SENSITIVITIES: Measures IgG antibody reactivity to 204 foods to help uncover potential dietary triggers, support a personalized elimination diet and provide insights into how your body may respond to different foods.
- SUPPORTS SYMPTOM RELIEF: Designed to help you explore potential food-related causes of symptoms like bloating, headaches, digestive discomfort and low energy including intolerances to gluten, shellfish, dairy or lactose.
- ELIGIBILITY & RESTRICTIONS: This HSA/FSA eligible test is intended for adults 18 plus and is NOT AVAILABLE IN NEW YORK.
- FAST, ACTIONABLE RESULTS: Receive digital results in an easy-to-read dashboard usually within 3-5 business days after your sample is received by the lab, so you can make confident choices, share with your doctor and prioritize your health.
- EASY, AT-HOME SAMPLE COLLECTION: Everything you need is included in one at-home collection kit. Just collect a small blood sample and return by mail with the provided included shipping label. No clinic visits or appointments required.
- Milk
- Egg
- Fish
- Crustacean shellfish
- Tree nuts
- Peanuts
- Wheat
- Soybeans
- Sesame
Required major-allergen declarations apply to these allergens and ingredients containing their proteins, subject to the rules’ scope and exceptions. Sesame became the ninth major food allergen on January 1, 2023. FDA notes that some products already in distribution or stock may not have a sesame declaration, so contact the manufacturer if you are uncertain. Details are in the FDA’s allergen overview.
Repeat the check for every purchase
- Locate the ingredient statement. Read every ingredient, not just the front label or a highlighted allergen box.
- Look for the food-source name. Check common ingredient names and parenthetical disclosures, then look for a nearby Contains statement.
- Read advisory wording independently. Note any “may contain” or facility statement naming the allergen; do not treat its absence as proof that cross-contact cannot occur.
- Check the package in your hand. Ingredients and formulations can change, so a product you have bought before may not have the same label now.
- Resolve uncertainty before buying. If the label does not answer your question, leave the snack and ask the manufacturer or distributor listed on its package what it contains.
FDA’s consumer advice is to check the label each time and contact the manufacturer or distributor when in doubt: Have Food Allergies? Read the Label.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteRank #3
- AT-HOME KIT: One small hair sample. 1,000+ everyday items. A fast, non-invasive way to explore possible wellness signals related to foods, drinks, nutrients, household items, and general gut-wellness factors—right from home.
- WHY PEOPLE LOVE THIS: If you’ve ever been told “you’re fine” but don’t feel it, this may be your next wellness tool. Your interactive report highlights indicators and wellness connections that may help you understand what’s supporting you—and what may be holding you back.
- 3 STEPS. ZERO STRESS: 1. Register – Activate your kit in your customer portal. 2. Collect – Snip 10 strands of hair. 3. Mail – Use the prepaid return envelope included. Simple, fast, and designed for at-home convenience. Colored, body or facial hair accepted.
- 72 HOUR WELLNESS INSIGHT REPORT: Receive clear, color-coded wellness insights uploaded to your portal within 72 hours of sample receipt. Your interactive clickable report makes it easy to click and learn more about each item.
- NOT A BIG TECH LAB. A FAMILY-RUN WELLNESS BRAND: We’re family-owned—not a data giant. Independently recognized to ISO/IEC 27001 for data protection. Your data is private and never sold. Trusted and used by holistic, chiropractic, and functional wellness professionals as a complementary tool to support everyday wellness conversations
Do not rely on a “free” claim alone
A front-label claim such as “dairy-free” or “milk-free” does not replace reading the complete current label. FDA guidance says there is no specific regulation defining “free” for every major allergen; the agency expects voluntary allergen-free claims to be truthful and not misleading. Read the ingredients and relevant statements, and contact the manufacturer if the label leaves you uncertain.
FDA has also reported a specific investigation in which milk levels ranged from 600 to 3,100 parts per million in certain dark-chocolate products discussed in its 2023 consumer update. That finding concerns those products, not packaged snacks generally; it is not a general estimate or a threshold for deciding whether a snack is safe. See FDA’s dark-chocolate update.
Rank #4
- IDENTIFY FOOD SENSITIVITIES: Measures IgG antibody reactivity to 96 foods to help uncover potential dietary triggers, support a personalized elimination diet and provide insights into how your body may respond to different foods.
- SUPPORTS SYMPTOM RELIEF: Designed to help you explore potential food-related causes of symptoms like bloating, headaches, digestive discomfort and low energy including gluten, shellfish, dairy or lactose.
- ELIGIBILITY & RESTRICTIONS: This HSA/FSA eligible test is intended for adults 18 plus and is NOT AVAILABLE IN NEW YORK.
- FAST, ACTIONABLE RESULTS: Receive digital results in an easy-to-read dashboard usually within 3-5 business days after your sample is received by the lab, so you can make confident choices, share with your doctor and prioritize your health.
- EASY, AT-HOME SAMPLE COLLECTION: Everything you need is included in one at-home collection kit. Just collect a small blood sample and return by mail with the provided included shipping label. No clinic visits or appointments required.
Know when ordinary packaged-food rules may not apply
This guidance concerns U.S. foods regulated by FDA. Some foods are regulated by other federal agencies, and FDA describes food put into a container after a customer orders it at the point of purchase as outside the cited packaged-food labeling requirement. For unpackaged or made-to-order food, ask the store staff or responsible business directly about ingredients and allergen handling. The FDA outlines the scope and exceptions in its food allergy guidance.
Quick Recap
Best Value
- UNCOVER FOOD INTOLERANCES & ENVIRONMENTAL SENSITIVITIES CAUSING GUT & SKIN ISSUES. Symptoms like fatigue, acne breakouts, gas, diarrhea, and headaches are most likely not random or allergy-related - they’re often caused by hidden food intolerances and environmental sensitivities. Food intolerances occur when the gut microbiome can’t digest an ingredient correctly, and environmental sensitivities develop when your body has a negative response when exposed to specific items in your indoor and outdoor environment. Testing is the only way to pinpoint specific dietary and lifestyle triggers so you’re not left guessing.
- TESTS 658 FOODS & 282 ENVIRONMENTAL ITEMS. Your hair sample is tested against key food categories including dairy, veggies, fruits, grains, meats, seafood, nuts, sweeteners, spices, fats, oils, mushrooms, superfoods, drinks, and preservatives. It’s also tested against indoor and outdoor items including animals, grasses, trees, flowers, mold, pollen, chemicals, fabrics, insects, and lotions.
- HOW IT WORKS: 3 EASY STEPS. 1) Register your hair analysis test on the 5Strands website or mobile app. 2) Collect 10-15 strands of hair from anywhere on your body. 3) Send it to our lab using the included prepaid shipping materials. 3) Results will be emailed or sent to the mobile app dashboard within 4 days of receiving your sample.
- MAKE TARGETED DIET & LIFESTYLE CHANGES WITH YOUR RESULTS. Each item is placed into one of four severity levels, helping you understand which items are safe , and what to reduce, remove, and use in moderation. This establishes a defined list of items to begin a proactive elimination plan.
- TRUSTED BY HOLISTIC HEALTH EXPERTS WORLDWIDE. Independent 3rd-party research has verified the benefits of our intolerance and sensitivity testing for adults and children. Every sample is processed in our certified U.S. laboratory and analyzed twice to ensure consistent results. Our at-home tests have helped more than 345,000 people and pets identify their food triggers and environmental stressors.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
