Lactose Tolerance Test

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4,500+ CLIA-certified labsNo appointment needed for most tests
Physician-orderedNo doctor’s visit or referral needed
Secure and confidentialNot billed to insurance
Most results in 1–3 daysIn your secure online account
HSA/FSA cards acceptedItemized receipt available

Price $159 ~~Compare at $318~~

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How to prepare Fasting required

Fasting is required for this lab test. You should not consume food or beverages other than water for at least 8 hours prior to visiting the lab. If you choose not to fast, it may affect your results

About this test

The Lactose Intolerance Tolerance Test is a diagnostic blood test designed to determine how your body processes lactose, the natural sugar found in milk and dairy products. Unlike allergy testing, this test evaluates how well your digestive system breaks down lactose after consumption, helping identify true lactose intolerance rather than an immune reaction.

Lactose intolerance occurs when the body does not produce enough lactase, the enzyme needed to digest lactose. When lactose is not properly broken down, it can cause uncomfortable digestive symptoms such as bloating, abdominal pain, gas, nausea, diarrhea, and in some cases skin reactions. These symptoms can significantly affect daily comfort and quality of life.

This test measures how your blood glucose levels respond after ingesting a controlled dose of lactose. In individuals who properly digest lactose, blood glucose levels rise as lactose is broken down into glucose and absorbed. In those with lactose intolerance, blood glucose levels rise minimally or not at all, indicating impaired lactose digestion.

Because lactose intolerance often develops gradually over time and is especially common in adults, many people live with symptoms for years without realizing the cause. This test provides clear, objective insight so you can make informed dietary decisions and avoid unnecessary discomfort.

What Is Included In This Test?

This test includes multiple timed blood draws to assess lactose digestion.

The testing process includes:

• A fasting blood sample
• Consumption of a 50 gram lactose solution
• Follow up blood samples collected at multiple intervals after lactose ingestion
• Measurement of blood glucose response over time

Why Does This Test Matter?

Digestive symptoms related to lactose intolerance are often mistaken for other gastrointestinal conditions, leading to unnecessary dietary restrictions or delayed diagnosis. This test helps clearly identify whether lactose is the cause of your symptoms.

Accurate diagnosis allows you to manage symptoms more effectively by adjusting dairy intake rather than eliminating entire food groups unnecessarily. It also helps distinguish lactose intolerance from milk allergies, which involve the immune system and require different management.

Because lactose intolerance affects a large percentage of adults and often worsens with age, testing provides clarity for long term dietary planning and digestive comfort.

Understanding your lactose tolerance empowers you to make confident nutrition choices, reduce digestive distress, and improve overall quality of life.

Who Should Consider This Test?

This test may be helpful for individuals experiencing digestive symptoms after consuming dairy products.

You should consider this test if you:

• Experience bloating, gas, or diarrhea after dairy consumption
• Have unexplained abdominal discomfort
• Suspect lactose intolerance but want confirmation
• Want to distinguish lactose intolerance from a milk allergy
• Have a family history of lactose intolerance
• Are part of a population with higher prevalence of lactose intolerance

Convenient, No-Appointment Testing

To complete your test:

Order online through our website
Use the lab locator to find a nearby testing location
Walk in; no appointment required
Access your results securely in your HealthLabs.com account within one to three business days

110% Price Guarantee!

If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.

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From order to results

No doctor's visit, no appointment and no insurance paperwork.

TodayOrder online No doctor’s referral or insurance needed. Our physicians provide the lab order.
Same dayWalk in to a nearby lab 4,500+ CLIA-certified U.S. labs. No appointment needed.
1–3 daysGet your results Most results post to your secure account within 1–3 business days.
NextTake them further Download them to share with your doctor, or text Patient Services with questions.

HealthLabs.com vs. going through your doctor

Feature	HealthLabs.com	Through your doctor
Referral needed	No, our physicians provide the order	Usually requires a visit first
Appointment	Walk in for most tests	Book, then wait for a visit
Insurance	Not needed	Co-pays and deductibles may apply
Price known upfront	Yes, listed next to every test	Often not until you're billed
Choose your own tests	Yes, from our full test menu	Your doctor decides
Getting results	Online, most in 1–3 business days	Often shared at a follow-up

Questions? We're here to help.

Call or text 1 (800) 579-3914.

Is this the same as a milk allergy test?

No this test measures digestion while allergy tests measure immune reactions.

Will this test tell me how much dairy I can tolerate?

It helps determine whether you digest lactose effectively but does not measure exact tolerance thresholds.

Will anyone see my results besides me?

Your results are stored in your secure online account. They are not shared with anyone else. If you choose, you can print or download them to share with your own doctor.

Do I need to fast before this test?

Fasting is not required for this test. You can eat and drink normally unless your doctor has given you other instructions.

Can I talk to someone about my results?

Yes. If your results come back abnormal or if you simply have questions, our team is here to support you. You can text our Patient Services team at 1800-579-3914.

Can I use insurance to pay for this test?

In order to ensure your privacy, we do not bill insurance directly, but you may use HSA or FSA funds. This keeps your results and testing completely private from insurers. We can also provide you with an itemized receipt for insurance reimbursement purposes if you need it.