ConsumerLab Finds 2 out 7 Colostrum Supplements Fall Short on IgG

White Plains, NY, October 28, 2026 — Colostrum supplements are promoted for immune and gut health because they contain immune proteins, particularly antibodies (immunoglobulins) such as IgG. However, ConsumerLab’s recent tests of popular colostrum supplements found that two of seven products fell short on key immunoglobulins, and costs varied dramatically.

Key Findings:

• Two products fell short on IgG: Only five of seven colostrum supplements contained the amounts of IgG claimed or expected in high-quality colostrum. One product contained just 1.3% IgG — less than 10% of the amount claimed – while others provided 13% to 35.4% IgG.

• Costs varied dramatically: The cost of obtaining an equivalent amount of IgG (200 mg) varied by 2,500%, ranging from just 27 cents to nearly $7.

ConsumerLab’s Top Picks

Among products that passed ConsumerLab’s quality testing and were Approved, ConsumerLab selected its Top Pick colostrum supplement that delivered one of the highest concentrations and amounts of IgG at a lower cost than most other products.

Access the Full Report:

The Colostrum Supplements Review includes test results and comparisons for seven colostrum supplements selected for testing by ConsumerLab: Adapt Naturals by Chris Kresser Bio-Avail Colostrum+, Armra Colostrum Health Revival - Unflavored, California Gold Nutrition Colostrum, Cowboy Superfood Powder Colostrum Bovine Colostrum - Vanilla, Sovereign Laboratories Colostrum-LD, WonderCow Colostrum - Unflavored, and Zena Nutrition Pure Colostrum 2,000 mg - Unflavored.

ConsumerLab’s full Colostrum Supplements Review can be accessed online by ConsumerLab.com members – currently over 100,000 individual subscribers and thousands more with access through libraries, schools, and medical centers.

The review examines evidence for colostrum’s potential benefits for immune health, gut health, athletic performance, and other conditions. It also explains what to look for on product labels, dosage, the best way to take colostrum, side effects and who should not take colostrum supplements.

Founded in 1999, ConsumerLab.com is a leading provider of consumer information and independent evaluations of products that affect health and nutrition. It has tested and reviewed over 7,000 products and has published Product Reviews covering nearly every popular category of dietary supplements and health foods.

Membership to ConsumerLab.com is available online and provides immediate access to continually updated reviews of nearly every popular type of dietary supplement and health food, answers to reader questions, and product recalls and warnings. ConsumerLab also provides independent product testing through its voluntary Quality Certification Program. The company is privately held and based in New York. It has no ownership from, or interest in, companies that manufacture, distribute, or sell consumer products.