Interactions on record — worth a quick check against your medications. Based on 1 of 3 ingredients. Check your meds →
Dietary supplement

Xtra-Cell Immunity Ingredients & Drug Interactions

by Douglas Laboratories

Xtra-Cell Immunity label
See full label image
Liquid Category: Non-nutrient/non-botanical
Most serious interaction: Minor
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Xtra-Cell Immunity against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Minor

Xtra-Cell Immunity is a dietary supplement by Douglas Laboratories with 3 active ingredients. Its ingredients are commonly taken for anemia and low iron, vitamin b12 support, general energy and fatigue.Based on those ingredients, 3 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Porcine Liver Aqueous Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Xtra-Cell Immunity by Douglas Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with Xtra-Cell Immunity by Douglas Laboratories — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Xtra-Cell Immunity by Douglas Laboratories

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 3 of its 3 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Xtra-Cell Immunity contains three active ingredients sourced from animal tissue: porcine thymus aqueous extract, porcine liver aqueous extract, and porcine spleen aqueous extract. These are water-based extracts meant to support immune function.

There are no inactive ingredients listed.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Liver Extract product and its label doesn't state a use — see Liver Extract's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence supporting liver extract for chronic fatigue syndrome is limited — it's rated possibly ineffective for that condition. For hepatitis C, there isn't enough reliable evidence to make a rating.

We hold no effectiveness data for the thymus and spleen extracts in this product.

The evidence, ingredient by ingredient Liver Extract

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

No adverse reactions have been reported in trials, but a comprehensive safety evaluation hasn't been done. There's concern about contamination because liver extract comes from raw animal liver obtained at slaughterhouses, potentially from sick or diseased animals.

There's also a risk that liver extracts from countries where mad cow disease (BSE) has been reported — including Great Britain, France, The Netherlands, Portugal, Luxembourg, Ireland, Switzerland, Oman, and Belgium — could theoretically carry contaminated tissue, though no cases of BSE transfer to humans from these products have been reported. Liver extract can deliver very high levels of vitamin A, which may harm a developing baby; the safety data advises against it in pregnancy unless your doctor advises otherwise.

Safety hasn't been well studied overall, so talk with your doctor before using.

Side effects, ingredient by ingredient Liver Extract

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Liver Extract.
  • The most serious interaction on file is rated Minor.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 3 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check with your pharmacist before using this product if you take warfarin (Coumadin) or any iron supplements or iron-containing medications. We could not check two of the three ingredients in this product for interactions, so run your exact drug list through the search tool on this page.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Only minor medication interactions are documented, and safety information is well characterized.

This product is aimed at immune support, but the evidence for its active ingredients is limited or unstudied. If you take warfarin or iron supplements, you should discuss this product with your pharmacist first.

Also consider the source-quality and contamination concerns noted in the safety data — ask your pharmacist whether the brand discloses where its animal extracts come from.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jan 25, 2012.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Xtra-Cell Immunity, straight from the product label.

Brand Douglas Laboratories
Barcode (UPC) 310539025031
Net contents 24 Bottle(s) of 0.3 fl. Oz. (9 ml); 7.2 fl. Oz.; 216 mL
Market status On market
Date entered into DSLD Jan 25, 2012
DSLD ID 5020
Product type Non-nutrient/non-botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Children 4 or More Years of Age, Adult (18 - 50 Years)
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Xtra-Cell Immunity by Douglas Laboratories, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
9 mL
Maximum serving Sizes:
9 mL
Servings per container
24
UPC/BARCODE
310539025031
IngredientAmount% DV
Porcine Thymus Aqueous Extract0.19 fl. Oz.--
Porcine Liver Aqueous Extract0.06 fl. Oz.--
Porcine Spleen Aqueous Extract0.06 fl. Oz.--

Other ingredients: None

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
FDA Statement of Identity

A Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested Usage: As a dietary supplement, take 1 bottle of Xtra-Cell(R) Immunity per day. Follow the instructions included in this box or as directed by your healthcare professional.

Precautions

KEEP OUT OF REACH OF CHILDREN

This product may not be suitable for children 12 years of age or younger, pregnant or nursing women, individuals taking immunosupressants, or persons allergic to pork products. Consult a healthcare professional before use.

FOR ORAL USE ONLY!

Warning: Do not use if security seal is broken or missing.

Storage

KEEP FROZEN

General

Formula #99458-24XC

General Statements

Individually Sealed

With Highly Concentrated 125X Mesenchyme Extract

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Xtra-Cell Immunity by Douglas Laboratories label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Xtra-Cell Immunity label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Xtra-Cell Immunity by Douglas Laboratories

These are the 3 active ingredients this product is made of. Select any to open its full monograph.

Serving size9 mL Dosage formLiquid Servings per container24 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Porcine Thymus Aqueous Extract

0.19 fl. Oz. per serving

Porcine Liver Aqueous Extract

Interacts with
3 drugs
0.06 fl. Oz. per serving

Liver extract is a dried or concentrated form of animal liver that is naturally rich in iron, vitamin B12, vitamin A, and other nutrients. It was once...

Porcine Liver Aqueous Extract monograph & interactions

Porcine Spleen Aqueous Extract

0.06 fl. Oz. per serving

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Xtra-Cell Immunity by Douglas Laboratories Drug Interactions

Want to check YOUR meds against Xtra-Cell Immunity?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
3Drugs
3 Minor

Ingredients driving the most interactions

Porcine Liver Aqueous Extract 3

Individual Drug Interactions

The ingredients in Xtra-Cell Immunity interact with 3 drugs. Click any drug to see the details.

1 of the 3 ingredients in Xtra-Cell Immunity interact with drugs. Each result below shows which ingredient is responsible. Porcine Liver Aqueous Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Xtra-Cell Immunity with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Porcine Liver Aqueous Extract2 drug types · 3 drugs

Iron

Liver extract can contain heme iron. Taking liver extract with iron-containing medications or supplements may increase total iron intake and could increase the risk of gastrointestinal adverse effects or excessive iron accumulation. The risk is greater with high doses, prolonged use, or in individuals with hemochromatosis or another iron-overload disorder. Review the iron content of the liver extract and the total elemental iron dose. Avoid unnecessary duplicate iron supplementation and consider monitoring ferritin and transferrin saturation when clinically appropriate.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Liver extract products may contain small and variable amounts of vitamin K. Theoretically, starting, stopping, or substantially changing the amount of liver extract used could reduce the anticoagulant effect of warfarin and lower the INR. However, this interaction has not been directly studied or reported in humans, and the vitamin K content of liver extract products is generally not standardized. Consider monitoring the INR after a meaningful change in liver extract use.

Likelihood Possible Evidence C
Porcine Liver Aqueous Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Xtra-Cell Immunity, from the product label.

Douglas Laboratories

See all Douglas Laboratories products
Name
Douglas Laboratories
Street Address
600 Boyce Road
City
Pittsburg
State
PA
ZipCode
15205
Web Address
www.douglaslabs.com
Pharmacist Counseling Corner

Xtra-Cell Immunity by Douglas Laboratories: Common Questions

Does Xtra-Cell Immunity by Douglas Laboratories interact with any medications?
Yes. Based on its ingredients, Xtra-Cell Immunity has a known interaction with 3 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Xtra-Cell Immunity contains 3 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this if I'm pregnant?
The liver extract in this product can deliver very high vitamin A, which may harm a developing baby. The safety data advises against it in pregnancy unless your doctor advises otherwise. Talk with your pharmacist or doctor before using it.
Has this product been tested for safety?
A thorough safety evaluation hasn't been conducted, and safety hasn't been well studied overall. No adverse reactions have been reported, but there are concerns about possible contamination from raw animal liver and potential mad cow disease contamination in products from certain countries.
What is porcine thymus extract supposed to do?
It's meant to support immune function, but we hold no data on its effectiveness, so we can't tell you whether it works for that purpose.
What is liver extract supposed to do in this formula?
It's included for immune support. The evidence for chronic fatigue syndrome is limited (rated possibly ineffective), and for hepatitis C there isn't enough reliable evidence to rate it. We don't have effectiveness data for the other uses people might consider.
Does this product contain any fillers or other inactive ingredients?
No — the product facts list no inactive ingredients.
Could this affect my iron levels?
The liver extract in this product contains heme iron. If you also take iron supplements or iron-containing medications, combined intake could raise your total iron and potentially cause stomach upset or, in people with iron-overload conditions, worsen iron accumulation. Talk with your pharmacist about your iron intake.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Xtra-Cell Immunity label
Go deeper

The Full Monographs Behind Xtra-Cell Immunity’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Liver Extract

Interacts with 3 drugs

Liver extract is a dried or concentrated form of animal liver that is naturally rich in iron, vitamin B12, vitamin A, and other nutrients. It was once used to treat certain anemias before pu...

Read the full Liver Extract monograph →
Sources

Sources & How We Checked

Xtra-Cell Immunity's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 4 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Liver Extract 4 references
  1. Lewis CJ. Letter to reiterate certain public health and safety concerns to firms manufacturing or importing dietary supplements that contain specific bovine tissues. FDA. Available at: www.cfsan.fda.gov/~dms/dspltr05.html.
  2. Kaslow JE, Rucker L, Onishi R. Liver extract-folic acid-cyanocobalamin vs placebo for chronic fatigue syndrome. Arch Intern Med 1989;149:2501-3. DOI
  3. Ebinuma, H., Saito, H., Tada, S., Masuda, T., Kamiya, T., Nishida, J., Yoshioka, M., and Ishii, H. Additive therapeutic effects of the liver extract preparation mixture adelavin-9 on interferon-beta treatment for chronic hepatitis C. Hepatogastroenterolog
  4. Saito, H., Ebinuma, H., Tada, S., Tsunematsu, S., Atsukawa, K., Masuda, T., Tsuchiya, M., and Ishii, H. Enhancing effect of the liver extract and flavin adenin dinucleotide mixture on anti-viral efficacy of interferon in patients with chronic hepatitis C. PubMed

See these in context on the Liver Extract monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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