Colostrum is having its moment. It's on your feed, it's in your group chats, and at least one celebrity swears it changed her skin, her gut and her life.
Here's what the ads skip: the five most-talked-about colostrum products are wildly different products at wildly different prices — two of them won't tell you how much colostrum is in a serving, and only one will tell you how much IgG.
So we did what we always do. We bought them, pulled the labels, checked the prices, and put every claim side by side. Ten minutes here could save you $60 a jar — or stop you from buying a collagen powder that's wearing a colostrum costume.
All five, side by side
Every figure below comes from the brands' own product pages (checked July 12, 2026), the printed labels of the products we purchased (photographed July 16, 2026) and, for Earth Energy, the printed Supplement Facts label verified July 14, 2026. "Not stated" means exactly that — we could not find the number.
| Earth Energy | Cowboy | ARMRA | WonderCow | Bloom | |
|---|---|---|---|---|---|
| Price | $59.95 | $69.00 | $119.99 | $64.99 | $29.99 |
| Servings | 60 | 40 | 120 | 60 | 25 |
| Cost per serving | $1.00 ($0.80 sub) | $1.73 ($1.29 sub) | $1.00 | $1.08 | $1.20 |
| Colostrum per serving | 2,000 mg — stated | 3,000 mg — stated (label we bought) | Not on page (packet box we bought: 1,000 mg) | Not on page (jar we bought: 2 scoops/2 g — 2,000 mg) | 1,000 mg (plus 3.7 g collagen) |
| IgG claim | 25% IgG — 500 mg/serving (label) | Not stated anywhere | Not stated | 40% IgG (listing; serving weight not stated) | Not stated (this product) |
| Testing claim | Third-party, ISO/IEC 17025 — heavy metals, microbial, contaminants | "3rd Party Tested" (no standard named) | Third-party, FDA-registered ISO/IEC-certified labs | GMP-certified facilities | "Third-party tested" (unspecified) |
| Sourcing claims | Grass-fed, pasture-raised Grade A US, calf-first | Grass-fed, calves fed first, first-day milking | Grass-fed, US family farms, calf-first, glyphosate-free | USDA Grade A, 7th-gen family farm, collected within 24h | US family dairy farms |
| What it actually is | Pure colostrum | Whole colostrum powder | Colostrum concentrate (proprietary processing) | Whole colostrum, not skimmed | Mostly collagen (3.7 g) + 1 g colostrum + probiotic |
A "win" cell marks the best disclosed figure in that row, not an overall verdict. Full scored reviews: Earth Energy 70/100 · Cowboy 55/100 · ARMRA 48/100 · WonderCow 46/100 · Bloom 45/100.
The rest of the field, honestly
Cowboy Colostrum Nature’s Gold
We bought the unflavored and vanilla tubes, and the label leads the category where it counts most: 3 g of whole colostrum per scoop, printed plainly — the biggest disclosed dose of the five, at $0.58 per disclosed gram ($0.43 on subscription; only our pick's $0.40–$0.50 beats it). The sourcing story is specific and credible — grass-fed, calves fed first, first-day milking — and it's the least-processed-looking powder on our cutting board. What stops it at 55: no IgG percentage or amount appears anywhere on the label, the "3rd Party Tested" claim names no standard, and its marketing dresses consumer surveys up as clinical results. The biggest scoop in the category, awaiting its proof.
ARMRA Colostrum (Unflavored Jar)
ARMRA built the colostrum category and it shows: proprietary "Cold-Chain BioPotent" processing, calf-first grass-fed sourcing, glyphosate-free claims, and third-party testing at FDA-registered, ISO/IEC-certified labs. The 120-serving jar makes its $1.00 per serving the lowest sticker math here. The catch that stops us cold: the product page doesn't state how much colostrum is in a serving — so you can't compare its dose, or its real cost per gram, with anything else on this page.
WonderCow Colostrum Powder
WonderCow's pitch is the opposite of high-tech processing: whole colostrum from a 7th-generation family farm, not skimmed or homogenized, collected within 24 hours from USDA Grade A dairies — and its listing carries the highest IgG percentage here (40%). The product page doesn't state a serving weight — but the jar we purchased does (2 scoops = 2 g = 2,000 mg, label photographed July 17, 2026). Against that, the listing's 40% would mean 800 mg of IgG — the biggest computed dose here if accurate, which we can't verify: the label itself states no IgG and no COA is published, unlike our pick's 25%, printed on the label. Manufacturing is GMP-certified, but no independent testing standard is named.
Bloom Nutrition Colostrum & Collagen Peptides
Bloom's $29.99 price tag is the gateway drug of this category — but look at what's in the scoop. Each 4.7 g serving is 3.7 g bovine collagen and just 1 g of colostrum (plus a probiotic). That's a perfectly legitimate collagen product with a colostrum accent — credit to Bloom for disclosing both numbers, which is more than half this list manages. Per gram of actual colostrum, you're paying $1.20 — more than our pick's $1.00, from a "third-party tested" claim with no named standard.
How we picked — and what we couldn't verify
This comparison ranks what the brands disclose, because disclosure is the only thing a shopper can verify before buying. We weighted three questions: does the label state the colostrum dose? Is the testing claim tied to a named, checkable standard? What does a disclosed gram of colostrum actually cost? Prices and label claims were pulled from each brand's own product page on July 12, 2026, and from the printed labels of the products we purchased and photographed on July 16, 2026. None of the five states every number we'd want — though our own pick states both its dose (2,000 mg) and its IgG percentage (25%) on the label, and Cowboy states the biggest dose of all (3,000 mg) without any IgG figure. All five now carry full scored reviews under our 100-point methodology — Earth Energy (70/100), Cowboy (55/100), ARMRA (48/100), WonderCow (46/100) and Bloom (45/100) — including our pick’s, which documents its weaknesses. This page is re-checked monthly.
Frequently asked questions
What should I look for on a colostrum label?
Three things: the disclosed amount of colostrum per serving (in mg or g), a stated IgG percentage or amount, and a named, verifiable testing standard or program — not just the words "third-party tested." Of the five products we compared in July 2026, three disclosed a colostrum amount per serving upfront; buying the products let us document a fourth from its own jar label (WonderCow: 2,000 mg). Only one pairs its amount with a quantified IgG.
Is the most expensive colostrum the best?
Price and quality are not the same thing in this category. In our July 2026 comparison, the $119.99 option did not state its serving weight on its product page, while lower-priced options disclosed exact amounts. Compare cost per disclosed gram of colostrum, not sticker price.
What does IgG mean on a colostrum label?
IgG (immunoglobulin G) is the antibody colostrum is best known for, and brands use its percentage as a shorthand for potency. A stated IgG percentage lets you compare products directly; "naturally high in IgG" without a number does not. Research on IgG has examined specific intakes — a percentage without a serving weight still doesn't tell you the actual dose.
Is bovine colostrum safe?
Bovine colostrum is a dairy product and contains milk allergens, so people with dairy allergies should avoid it. Beyond that, individual needs vary — if you are pregnant, nursing, immunocompromised or considering colostrum for a health condition, talk with your healthcare provider first.
The Label Brief — free weekly report
This page gets re-checked every month. Want the updates first?
Prices move, formulas change, new brands drop monthly. We re-run this comparison and send what changed — one five-minute email a week. No hype, no sponsored scores.
Get The Label Brief free →Sources
- Earth Energy Supplements — Pure Bovine Colostrum product page (price, serving, testing, sourcing). Checked July 12, 2026. earthenergysupplementstore.com/products/colostrum
- ARMRA — Colostrum Unflavored Jar product page (price, servings, processing, testing, sourcing). Checked July 12, 2026. armra.com/products/armra-unflavored-jar
- Earth Energy Supplements — Pure Bovine Colostrum printed Supplement Facts label (2 g scoop, 60 servings, 2,000 mg TruColostrum®, 25% IgG, allergen: milk). Provided by the brand and verified July 14, 2026.
- WonderCow — Colostrum Powder product page and listing (price, servings, IgG claim, sourcing). Checked July 12, 2026. wondercow.com/products/colostrum-powder
- Bloom Nutrition — Colostrum & Collagen Peptides (Target listing: price, serving composition). Checked July 12, 2026.
- Cowboy Colostrum — Nature’s Gold printed Supplement Facts label (1 scoop/3 g, 40 servings, 3 g bovine colostrum, contains milk; no IgG figure; "3rd Party Tested," no standard named; Cowboy Colostrum LLC, Miami FL). Purchased and photographed by The Ingredient Report, July 16, 2026.
- ARMRA — Immune Revival packet box (1,000 mg colostrum per packet). Purchased and photographed by The Ingredient Report, July 16, 2026.
Update history
- July 17, 2026 — We purchased WonderCow: its jar label states 2 scoops (2 g) = 2,000 mg whole colostrum — a serving weight the product page never discloses ($0.54/disclosed gram; the listing’s 40% IgG would compute to 800 mg if accurate — unverified, no COA). Review updated; its score stands. Also purchased: Bloom Strawberries & Cream (label: 2.5 g collagen + 1 g colostrum per 4.8 g scoop). All five compared products now photographed in hand.
- July 16, 2026 (later) — Comparison expanded to five products: Cowboy Colostrum Nature's Gold scored 55/100 and enters at #2 with the category's biggest disclosed dose (3 g) and no stated IgG. Pick unchanged — and restated honestly: Earth Energy no longer holds the biggest disclosed dose; it remains our pick as the only label that quantifies its IgG, with a named testing standard and the best per-gram price. Comparison table, FAQ and schema updated to five.
- July 16, 2026 — We purchased the compared products. ARMRA's packet box discloses 1 g per packet (first documentable serving weight — jar page still silent; review updated). Also purchased: Cowboy Colostrum Nature's Gold ($69/40 servings, a category-leading 3 g disclosed scoop, no IgG stated) — being scored now; this comparison expands to five products when its review publishes.
- July 15, 2026 (later) — Earth Energy full scored review published and linked (70/100 — same rubric, cons documented); all four products in this comparison now carry scored reviews. Earth Energy multi-pack pricing confirmed on PDP (3-pack $159.95, 6-pack $269.95).
- July 15, 2026 — Full scored reviews of ARMRA (48/100), WonderCow (46/100) and Bloom (45/100) published and linked; contender blocks updated. BBB records for all three checked this date.
- July 12, 2026 — Comparison first published: Earth Energy, ARMRA, WonderCow, Bloom. All prices and label claims checked this date. Next check: August 2026.
Content is for informational purposes only and is not medical advice. Individual needs and results vary. Medical disclaimer.