Best Colostrum Supplements 2026: The Label Test

The Problem

Every tub prints milligrams. Almost none print IgG.

Colostrum is sold by the milligram of powder, and powder is not the part that does the work. Immunoglobulin G is the antibody fraction inside it, and it is the fraction the clinical literature has been measuring for thirty years. Two tubs can both print 3,000 mg and hold very different amounts of it, because IgG depends on how soon after calving the colostrum was collected and how gently it was processed after that.

Of the 24 labels we read, 19 print no IgG number anywhere. Five do, and among those five the stated amount runs from 450 mg to 600 mg per serving, on powder weights that range from 2,000 mg to 3,000 mg. That is the whole argument in one line: the milligrams on the front tell you almost nothing about the milligrams that matter, and the gap between two products with identical front labels can be substantial.

The third thing worth reading is how the serving arrives. Three of the five ranked here ask for six capsules to reach the dose, which is a gelatin or cellulose shell wrapped around powder you could have stirred into water. One brand solves the IgG question by not raising it and prints 1,000 mg per scoop, a third to a half of what everyone else calls a serving. One scoop of the 24 printed the IgG, the standardization, and a full serving of powder behind them.

Tried colostrum and felt nothing? Look for the IgG line.

If the Supplement Facts panel names colostrum and a weight and stops there, nobody can tell you how much antibody you took, including the brand. A stated percentage is what turns a powder weight into a dose. Before you conclude colostrum does nothing, check whether the label ever told you what was in the scoop.

The Checks

Four checks. Nineteen of twenty-four fail the first one.

01^/04

IgG printed in milligrams

A line on the Supplement Facts panel giving the immunoglobulin G amount per serving. Not a mention of immunoglobulins in the marketing copy. A number, on the panel, that you can compare with another tub.

IgG · 575 mg per Scoop

02^/04

Standardized to 25% IgG or more

The percentage is what makes the number repeatable batch to batch. Without a standardization, the antibody content moves with collection timing and processing, and every tub is a slightly different product.

Standardized to 25% IgG

03^/04

2,000 mg of colostrum or more

A standardization only counts if there is enough powder behind it. At 1,000 mg per serving, even a strong percentage lands under the amounts the research has used. 2,000 mg is the floor where the arithmetic works.

2,300 mg per Serving

04^/04

The full serving in one scoop

Colostrum is a powder. A serving delivered as six capsules means swallowing a gelatin or cellulose shell six times to get what a single scoop of water-soluble powder delivers in one go.

One Scoop · No Capsules

Side by Side

The five, line by line.

	#1 Pick	#2	#3	#4	#5
Criteria	Suppla Colostrum	Dr. Mercola NZ	NOW Colostrum	ARMRA Colostrum	Ancestral Colostrum
Checks Passed	4 of 4	2 of 4	2 of 4	1 of 4	1 of 4
IgG Printed in mg	✓	✓	−	−	−
Standardized 25% or More	✓	−	−	−	−
2,000 mg or More	✓	✓	✓	−	✓
One Scoop, No Capsules	✓	−	✓	✓	−
IgG per Serving	575 mg	450 mg	not stated	not stated	not stated
Colostrum per Serving	2,300 mg	3,000 mg	2,400 mg	1,000 mg	3,000 mg
Third-Party Tested	✓	−	−	✓	✓
Our Rating	9.4	8.7	8.3	7.8	7.3

Scroll the table

Amounts read from each brand's published Supplement Facts panel in August 2026. A standardization is the stated percentage of immunoglobulin G in the powder; without it, the antibody content of a given tub is whatever the batch happened to carry.

The Ranking

Top 5 colostrum supplements, by the label.

No. 01

Ranked #1 of 24 labels read

Suppla Colostrum

2,300 mg Colostrum · 25% IgG · 575 mg IgG per Scoop · 30 Servings · Powder

4/4 Checks575 mg IgG PrintedStandardized 25% IgGThird-Party TestedGMP · Manufactured in USA60-Day Guarantee

9.4

Label Score

Strengths 09

575 mg of immunoglobulin G printed as its own line on the Supplement Facts panel.
Standardized to 25% IgG, so the antibody fraction is specified rather than implied.
2,300 mg of bovine colostrum per scoop, above the 2,000 mg line the standardization needs behind it.
One scoop in cold water or a smoothie. No capsule stack, no shell to swallow six times.
Thirty full servings per tub at the printed serving size.
Mixes in seconds with a mild clean taste, and no added flavors, sweeteners or fillers.
Third-party tested, GMP certified, manufactured in the USA.
The only formula of the 24 we read that printed both the milligrams and the percentage.
60-day money-back guarantee.

Limitations 02

Contains milk, so it is not an option for a dairy allergy.
Thirty servings per tub, fewer than the large-format powders that price by the gram.

The verdict Most colostrum is sold by the weight of the powder, which is the one number that does not tell you what you are taking. This scoop prints 2,300 mg of colostrum, a 25% standardization, and 575 mg of IgG behind it. It was the only product of the 24 we read that passed all four checks.

See Price and Availability ✓ 60-Day Money-Back Guarantee

The runners-up · 02 to 05

Strengths

Immunoglobulin 450 mg printed on the panel, which puts it in the minority that answers the question at all.
3,000 mg of New Zealand bovine colostrum per serving, the largest powder weight in the group.
Hypromellose capsule with a short excipient list, and grass-fed sourcing stated.

Limitations

450 mg of IgG inside 3,000 mg of powder works out to 15%, the lowest ratio of anyone printing a number.
Six capsules per serving, every day, to get there.
No standardization percentage stated, so the 450 mg is a figure rather than a specification.

The verdict The best of the capsule products and the clearest competitor label. It prints the IgG, which almost nobody does, and the ratio behind it is the weakest of those that do. Six capsules a day for 450 mg is a lot of shell for the dose.

Strengths

2,400 mg of dried bovine colostrum per level teaspoon, a real serving size at a low price per gram.
Powder format, so the full serving goes in one spoon rather than six capsules.
A long-established brand with a stated BSE-free source and wide retail availability.

Limitations

No IgG amount and no standardization anywhere on the panel. The immunoglobulins are mentioned only in the product description.
Maltodextrin is listed in the other ingredients, so part of what you scoop is not colostrum.
No third-party testing stated; the label describes in-house quality testing only.

The verdict The most affordable real serving on the shelf, and the least informative label. A generous 2,400 mg with maltodextrin in the mix and no antibody figure at all. Fine value, no way to verify what you are getting.

Strengths

A single ingredient with nothing added, and the powder dissolves cleanly or can be taken dry.
Third-party tested by ISO certified laboratories for heavy metals, contaminants and microbiology.
Grass-fed, pasture-raised US sourcing, stated clearly on the jar.

Limitations

1,000 mg per scoop, roughly a third to a half of what the other four call a serving.
No IgG amount and no standardization on the panel. The immunoglobulins appear only in the marketing.
The powder is a proprietary concentrate, so what the processing preserved is not specified.

The verdict The best-tested and best-sourced label here, attached to the smallest serving in the category. One gram per scoop with no antibody figure means the strongest sourcing story on the shelf and the least verifiable dose. Fourth of the five.

Strengths

3,000 mg of grass-fed, pasture-raised colostrum per serving, tied for the largest weight here.
Third-party lab tested for purity and GMP certified.
One ingredient plus the capsule. No fillers and no flow agents.

Limitations

No IgG amount and no standardization percentage anywhere on the panel.
Six gelatin capsules per serving, which rules it out for a vegetarian routine.
The bottle and the product page disagree on the sourcing country, which is not what you want on a traceability claim.

The verdict A clean single-ingredient product with a serving size to match, delivered as six gelatin capsules and silent on the number that decides the category. Good sourcing, no antibody figure, last of the five.

What Changes, When

What to expect on a standardized scoop.

Week 01 to 02

Settling in

One scoop a day in cold water. Digestive comfort is usually the first thing people register, and a short adjustment in the first days is normal.

Week 02 to 04

The barrier work

Support for the gut lining builds with consistency rather than with a bigger scoop. This is the window most people describe as things settling down.

Week 04 to 08

The steady state

Support for normal immune function is the slower half of the picture. It compounds with daily use and it fades when the routine stops.

FAQ

Questions we get asked.

The IgG line first. A milligram amount printed on the Supplement Facts panel, and a standardization percentage next to the colostrum itself. Then at least 2,000 mg of colostrum per serving to put behind that percentage. And a powder, so the serving arrives in one scoop instead of six capsules.

Because powder weight and antibody content are two different things. IgG depends on how soon after calving the colostrum was collected and how gently it was processed. Two tubs can print the same weight and carry very different amounts of the fraction the research measured, and only one of them will tell you which.

Most people notice the digestive side within the first two to four weeks of daily use. Support for normal immune function is slower and builds across four to eight weeks. It is a daily habit, not a loading protocol.

Every day, one scoop in 6 to 8 oz of cold water or your usual cold drink, consumed within about ten minutes of mixing. Keep it out of hot liquids. Consistency is what makes the difference over a month, not the size of any single scoop.

The Evidence

Why IgG, and why the collection timing changes it.

Bovine colostrum has been studied for support of the intestinal barrier, and a meta-analysis of randomized trials has reported support for measures of intestinal permeability in athletes and other adults. One randomized study compared colostrum collected soon after calving with colostrum collected later and found the two behaved differently at the same daily amount, which is the clearest argument for reading the antibody line rather than the weight. Further trials have reported support for normal immune function with daily use.

Best Colostrum Supplements 2026: The Label Test.

Every tub prints milligrams. Almost none print IgG.

Four checks. Nineteen of twenty-four fail the first one.

IgG printed in milligrams

Standardized to 25% IgG or more

2,000 mg of colostrum or more

The full serving in one scoop

The five, line by line.

Top 5 colostrum supplements, by the label.

Suppla Colostrum

Strengths 09

Limitations 02

Dr. Mercola New Zealand Colostrum

Strengths

Limitations

NOW Foods Colostrum Powder

Strengths

Limitations

ARMRA Colostrum

Strengths

Limitations

Ancestral Supplements Grass Fed Colostrum

Strengths

Limitations

What to expect on a standardized scoop.

Settling in

The barrier work

The steady state

Questions we get asked.

2,300 mg of colostrum. 575 mg of IgG, printed.

Why IgG, and why the collection timing changes it.

References

Editorial Disclosure

Advertising Disclosure