Can You Buy a Grandparent or Sibling DNA Test at a Pharmacy?

If you have been searching for a grandparent DNA test at CVS or a sibling DNA test at Walgreens, you are not the first person to look there. Pharmacies are where most people start when they think about DNA testing. It makes sense -- CVS and Walgreens both carry paternity test kits on their shelves, so it is reasonable to assume they would carry other relationship tests too.

They don't. Pharmacies only sell paternity test kits. If you need a grandparent, sibling, or aunt/uncle DNA test, you will not find one at any retail pharmacy in the country. This article explains why that is, what you actually find on pharmacy shelves, how kinship tests differ from paternity tests, and where to get one.

Do CVS or Walgreens Sell Grandparent or Sibling DNA Tests?

No. As of 2026, neither CVS nor Walgreens carries grandparent DNA tests, sibling DNA tests, or any other kinship test. Both chains only stock paternity test kits. That has been the case for years, and there is no sign of it changing.

This surprises a lot of people. You might assume that a store carrying one type of DNA test would carry others. But paternity testing is a much bigger market than grandparent or sibling testing. Pharmacies stock what moves fastest off the shelf, and paternity kits outsell every other relationship test by a wide margin.

If you have already checked the family planning or health aisle at your local CVS or Walgreens and came up empty, that is not a stock issue. They simply do not carry these products. The same goes for Rite Aid and other national pharmacy chains.

What You Actually Find on Pharmacy Shelves

Walk into the DNA testing aisle at CVS or Walgreens and you will see one type of product: paternity test kits. There are a few brands, but they all test for the same thing -- whether an alleged father is the biological parent of a child.

Here is what is currently available:

• CVS Health Paternity Test (store brand) -- An all-inclusive kit priced at roughly $109 to $140. Lab fees are included in the shelf price. Analyzes 20 genetic markers.
• Third-party collection-only kit at CVS -- About $27 at the register, but you still owe a separate lab fee of around $139 once you register the kit online. Real total: about $166.
• Walgreens Paternity Test Kit (store brand) -- An all-inclusive kit at about $120. Check the packaging to confirm lab fees are included.
• Walgreens At-Home DNA Kit -- A collection-only kit at roughly $30, plus a separate lab fee of $119 to $139. Real total: about $149 to $169.

Every one of those is a paternity test. None of them can tell you whether two people are siblings, whether a child is biologically related to a grandparent, or whether an aunt or uncle shares a family connection with a niece or nephew. For a detailed comparison of every pharmacy paternity option and how they stack up against lab-direct testing, the full CVS and Walgreens paternity test comparison covers each one.

Why Pharmacies Only Stock Paternity Tests

It comes down to demand. Paternity testing is far and away the most common type of relationship DNA test. More people search for it, more people buy it, and more people need it on short notice. From a retail perspective, it is the only DNA test worth putting on a shelf.

Grandparent, sibling, and aunt/uncle tests serve a smaller audience. The situations that call for these tests are more specific, and the people who need them tend to do research online before ordering. They are not impulse purchases. A pharmacy would have boxes sitting on the shelf for months before selling one, and that is not how retail works.

There is also a complexity factor. Kinship tests require more explanation than a paternity test. A paternity kit has one job: compare father and child. Sibling and grandparent tests involve different statistical models, different participant combinations, and different expectations about what the results will show. That is harder to communicate on the back of a box in a pharmacy aisle.

How Grandparent and Sibling Tests Differ from Paternity Tests

All of these tests use the same underlying science -- STR (Short Tandem Repeat) analysis of genetic markers extracted from cheek swab samples. The difference is in what the lab is calculating and how much data it needs to reach a conclusion.

Paternity Test

A paternity test compares a child's DNA directly to the alleged father's DNA. Half of a child's genetic markers come from the father, so the comparison is straightforward. The lab checks whether those markers match. In almost every case, the result is clear-cut: either the man is the biological father (99.99% or higher probability) or he is not (0% probability).

Grandparent DNA Test

A grandparent DNA test compares a child's DNA to one or both of the alleged father's parents. The genetic relationship here is one generation removed. The child inherited DNA from the father, who inherited it from the grandparents. The lab has to work backward through that chain, which means the statistical analysis is more involved. Testing both grandparents produces significantly stronger results than testing just one, and including the biological mother's DNA helps the lab isolate which markers came from the paternal side.

Sibling DNA Test

A sibling DNA test compares the DNA of two people to determine whether they share one or both biological parents. Siblings do not inherit identical copies of their parents' DNA -- each child gets a different combination. That means two full siblings might share anywhere from roughly 38% to 61% of their DNA, while half siblings share less. The lab uses statistical models to calculate the likelihood of each relationship. For more on the science behind these percentages, the guide to how much DNA siblings share breaks it down.

Aunt/Uncle (Avuncular) DNA Test

An aunt/uncle DNA test checks whether a child is biologically related to the alleged father's sibling. The genetic overlap between an aunt or uncle and a niece or nephew is smaller than between a parent and child, so the lab needs to analyze more markers and apply different statistical calculations to reach a reliable conclusion.

The bottom line: kinship tests require more complex analysis and more genetic markers than a standard paternity test. That is part of why they are not sold at pharmacies -- the testing is more involved, and the results take more careful interpretation.

Where to Get a Grandparent or Sibling DNA Test

Since pharmacies do not carry these tests, your options are online. Lab-direct providers like US Diagnostics Center sell kinship test kits through their websites and ship them to your door. You order online, collect cheek swab samples at home, mail them back in a prepaid return shipping envelope, and get results through a secure online portal.

The process is identical to what you would do with a pharmacy paternity kit. The only difference is that you order the kit online instead of picking it up off a shelf. The collection is the same simple cheek swab. The return shipping is prepaid. And the lab analysis uses the same STR profiling technology.

US Diagnostics Center analyzes up to 28 genetic markers on every kinship test, which is above the industry standard of 20 or more. Results are ready within 2 to 3 business days after samples arrive at the lab. Rush processing options are available during checkout if you need results faster.

USDC Kinship Test Lineup and Pricing

US Diagnostics Center offers three kinship tests, all at the same price point. Every kit includes the collection materials, lab processing, prepaid return shipping, and results. No hidden fees, no separate lab charges.

• Sibling DNA Test Kit -- $139. Determines whether two people are full siblings, half siblings, or not biologically related.
• Grandparent DNA Test Kit -- $139. Establishes whether a biological relationship exists between a child and one or both of the alleged father's parents.
• Aunt/Uncle DNA Test Kit -- $139. Determines whether a child is biologically related to the alleged father's sibling.

Each kit tests up to 28 genetic markers and delivers results in 2 to 3 business days after the lab receives your samples. For comparison, the home paternity test kit is $79 with the same all-inclusive pricing.

How At-Home Kinship Testing Works

If you have ever used a home paternity test kit -- whether from a pharmacy or ordered online -- the process for a kinship test is the same. Here is how it works step by step.

1. Order the kit online. Choose the test that fits your situation (sibling, grandparent, or aunt/uncle) and place your order. The kit ships to your address and typically arrives within a few business days.
2. Collect DNA samples at home. Each participant rubs a soft-tipped cheek swab along the inside of their cheek for 30 to 60 seconds. No needles, no blood, no discomfort. Make sure nobody eats, drinks, smokes, or chews gum for at least 30 minutes before swabbing.
3. Mail samples back to the lab. Seal each person's swabs in their labeled envelope, place everything in the prepaid return shipping envelope, and drop it in the mail.
4. Lab processes your samples. The lab extracts DNA, runs STR analysis across up to 28 genetic markers, and calculates the probability of the tested relationship. Processing takes 2 to 3 business days.
5. Get your results. You receive a notification when your report is ready on the secure online portal. The report includes a probability percentage and a clear conclusion about the tested relationship.

The kits ship in plain, unmarked packaging, which a lot of people prefer over buying a DNA test in person at a pharmacy. The entire process from order to results typically takes 7 to 10 business days with standard shipping.

When You Need a Grandparent Test vs. a Sibling Test vs. an Aunt/Uncle Test

These three tests all serve the same basic purpose: establishing a biological family connection when the alleged father is not available to take a direct paternity test. Which one makes sense depends on who in the father's family is available and willing to participate.

Choose a Grandparent Test When:

• The alleged father has passed away and his parents are available to test. This is the most common scenario for grandparent testing.
• The alleged father refuses to participate, but his parents are willing.
• You want to establish a paternal family connection and the grandparents are the most accessible relatives on the father's side.

Testing both grandparents produces the strongest results. If only one grandparent is available, including the biological mother's DNA sample (available as an add-on during checkout) significantly improves accuracy. For a deeper look at how this test works, the grandparent DNA test guide covers everything.

Choose a Sibling Test When:

• Two people want to find out whether they share the same biological father (or both parents).
• The alleged father is unavailable, but another one of his known children is willing to test.
• You are reconnecting with a potential sibling after adoption or family separation and want confirmation.

Including the biological mother's sample is strongly recommended for sibling tests because it helps the lab isolate paternal markers. The sibling DNA test guide walks through the full process.

Choose an Aunt/Uncle Test When:

• The alleged father is unavailable, but his brother or sister is willing to participate.
• The grandparents are also unavailable, making the father's sibling the most accessible relative on that side of the family.

The aunt/uncle DNA test guide covers when this option makes the most sense and what to expect from the results.

In all three cases, a direct paternity test is the better choice if the father is alive and willing to participate. It is simpler, less expensive at $79, and produces the most definitive results. Kinship tests are for situations where that is not possible. If the father has passed away and no relatives on his side are available, posthumous paternity testing may still be an option depending on the circumstances.

Frequently Asked Questions

Can I Buy a Grandparent DNA Test at CVS?

No. CVS only sells paternity test kits. Grandparent DNA tests are not available at CVS, Walgreens, Rite Aid, or any other pharmacy. You can order a grandparent DNA test kit online from US Diagnostics Center for $139 with all lab fees included.

Can I Buy a Sibling DNA Test at Walgreens?

No. Walgreens carries paternity test kits only. Sibling DNA tests are available online from lab-direct providers. The sibling DNA test kit from US Diagnostics Center is $139 with everything included -- collection kit, lab processing, prepaid return shipping, and results.

Why Don't Pharmacies Sell Grandparent or Sibling DNA Tests?

Demand. Paternity tests are by far the most common relationship DNA test, and pharmacies stock products that sell in volume. Grandparent and sibling tests serve a smaller, more specialized market. The people who need these tests typically research their options online and order directly from a lab.

Is an At-Home Kinship Test as Accurate as One Done at a Clinic?

The lab analysis is the same whether you collect your samples at home or at a clinic. What matters is the lab processing the samples and how many genetic markers they analyze. US Diagnostics Center tests up to 28 markers on every kinship test, which is above the industry standard of 20 or more. The main difference between home and clinic testing is chain of custody -- home test results are for personal knowledge, while clinic-supervised collection can produce results admissible in court.

How Long Does It Take to Get Results from a Kinship Test?

After samples arrive at the lab, processing takes 2 to 3 business days. Factor in a few days for shipping each way, and the entire process from order to results typically takes 7 to 10 business days with standard shipping. Rush processing is available during checkout if you need results sooner.

Should I Include the Mother's DNA Sample?

Yes, whenever possible. The biological mother's DNA helps the lab subtract her genetic contribution and isolate the markers the child inherited from the father's side. This improves the strength of the results, especially for grandparent and sibling tests. A Mother DNA Sample Add-On is available during checkout.