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Best Colostrum Supplements of 2026, Ranked by Cost per Gram of IgG

Updated October 31, 2026

Nutricost Colostrum 30% Powder is the cheapest label-claimed IgG we found: $0.59 per gram of IgG ($39.95 for 227 g at 30% IgG, as of October 2026). Only four of the nine powders we price-track state an IgG percentage at all. The other five can't be ranked on this metric, however good their marketing is, and every figure below is a seller claim that no published certificate of analysis backs up.

How we calculated cost per gram of IgG

The formula is simple: price ÷ net grams ÷ IgG fraction. A $39.95 tub of 227 g costs $0.176 per gram of powder. At 30% IgG, each gram of powder holds 0.30 g of IgG, so a gram of IgG costs $0.176 ÷ 0.30 = $0.59.

Three caveats apply to every number on this page:

• IgG percentages are brand claims. None of the nine brands publishes a batch certificate of analysis that we could find. None names the testing lab or the assay method either.
• Prices move. All prices were checked on October 9, 2026, mostly on Amazon. Run your own numbers with the colostrum price calculator.
• Net weight matters more than servings. Several brands give inconsistent serving sizes (see below), so we work from container grams, not from "servings per container".

The ranking

For origin, processing and testing claims side by side, see the full 9-brand price comparison table.

Notes on the four ranked products

1. Nutricost Colostrum 30% Powder: $0.59/g IgG

At a 3 g serving and 76 servings, each serving costs about $0.53 and should carry about 0.9 g of IgG if the 30% claim holds. That makes it roughly 4.5 times cheaper per gram of IgG than the next single-figure claim. What it leaves out: origin ("globally sourced ingredients"), processing method and collection window are all not stated. The brand says each batch is tested by ISO-accredited labs but publishes no COA.

2. Sovereign Laboratories Colostrum-LD: $1.44–$2.40/g IgG

Sovereign states a range ("15%–25% naturally occurring IgG") rather than a minimum, so the honest result is a range too. At the low end it still beats every remaining single-figure claim. A 5 g serving costs about $1.81 and works out to 0.75–1.25 g of IgG. It is not single-ingredient: a sunflower-lecithin/milk-lipid "liposomal" coating is part of the formula. We found no third-party testing claim.

3. BIOMIXA Bluegrass Colostrum: $2.67/g IgG

Disclosure: BIOMIXA is the site owner's own brand, and it ranks third here on its own numbers. The ≥25% IgG figure appears only on biomixa.com. The Amazon listing just says "Natural IgG". The label is also internally inconsistent: it lists a 3 g scoop with 750 mg IgG and 60 servings, yet the jar holds 120 g, which implies 2 g servings. We use the 120 g net weight and the 25% figure, and we do not repeat the 750 mg claim. No published COA.

4. Folqs Bovine Colostrum Powder: $3.17/g IgG

Folqs claims 21% IgG (420 mg per 2 g scoop) and says the figure is "third-party verified". That claim is on folqs.co. The Amazon listing mentions only "naturally occurring immunoglobulins", and the brand FAQ also refers to a 3 g serving. Drying method not stated.

The five that can't be ranked, and what they'd need to claim

Without an IgG percentage, a cost per gram of IgG doesn't exist. What we can compute is a break-even: the IgG percentage each product would need to match the cheapest ranked option (Nutricost, $0.59) and the most expensive one (Folqs, $3.17).

The practical reading: no undisclosed product can plausibly beat Nutricost on this metric, except perhaps NOW if its powder were above 41% IgG. NOW doesn't say, and its powder contains added maltodextrin and sunflower lecithin. (NOW's 25% IgG figure belongs to its capsules, a different product.) ARMRA markets a casein-free, fat-free "concentrate", which could mean a higher IgG share than whole powder. It could also mean nothing; the brand doesn't publish the number. With ARMRA's recommended 4+ servings a day (1 g each), powder alone costs about $3.94 a day.

What the labels leave out

• Serving-size conflicts. BIOMIXA (our own brand) says 3 g vs. 2 g implied by the net weight. Folqs says 2 g vs. 3 g. ARMRA is 1 g on most label transcriptions, 2 g on one. NOW's older labels show 1.65 g vs. 2.47 g now. Always divide net grams yourself.
• Collection window. Claims range from "within 6 hours" (BIOMIXA) to "within 24 hours" (Folqs, Cowboy) to "first milking" (Sovereign) to not stated (Nutricost, NOW, Codeage). IgG concentration in bovine colostrum falls substantially over successive milkings (Godden, 2008), so the window matters. Without an IgG figure, though, you can't confirm it.
• Certificates of analysis. Several brands claim third-party testing for heavy metals, contaminants or IgG. None of them published a COA that we found.
• Additives. NOW (maltodextrin, lecithin) and Sovereign (lecithin coating) are not single-ingredient. That dilutes the colostrum per gram you pay for.

On effects: some small trials suggest bovine colostrum may modestly affect certain immune or gut markers, but the evidence is limited and inconsistent, and it is a dietary supplement, not a treatment (Playford & Weiser, 2021).

How to use this ranking

1. If IgG is what you're paying for, start with the cheapest verified-by-label figure and ask the brand for a batch COA before buying.
2. If you prefer whole, full-fat or single-ingredient powder, accept that you'll pay more per gram of IgG. In this set that's roughly 4.5–5.4 times more (BIOMIXA, Folqs).
3. Treat "naturally high in IgG" without a percentage as no information.

Our buyer's guide covers what to check on a label beyond IgG.

FAQ

Is cost per gram of IgG better than cost per gram of powder?

For comparing IgG value, yes. Price per gram of powder rewards cheap, low-IgG or diluted products. NOW has the second-lowest powder price in our set ($0.242/g) but discloses no IgG for its powder, so its real value is unknown. Cost per gram of IgG only works when the brand states a percentage, and that percentage is still an unverified claim.

Why is Sovereign shown as a range?

Sovereign Laboratories states "15%–25% naturally occurring IgG" rather than a single minimum. Picking the top of that range would flatter the product, and picking the bottom might understate it, so we report both ends: $1.44 to $2.40 per gram of IgG as of October 2026. Even the worst case beats BIOMIXA and Folqs.

Can I trust a "third-party tested" claim?

Only as far as the evidence published with it. Nutricost, Folqs, Cowboy Colostrum, ARMRA, WonderCow and BIOMIXA all make some testing claim, but none publishes a batch certificate of analysis that we could locate, and none names the lab. A COA that matches the lot number on your container is the minimum useful proof. Ask for it before buying.

Why doesn't ARMRA rank if it's a concentrate?

Because ARMRA does not disclose an IgG percentage, so there's nothing to divide by. At $0.984 per gram of powder, it would need about 31% IgG just to match Folqs and over 100% to match Nutricost. The second is impossible. "Concentrate" describes processing, not a guaranteed IgG content.

Sources

• Playford RJ, Weiser MJ. Bovine Colostrum: Its Constituents and Uses. Nutrients. 2021;13(1):265.
• Godden S. Colostrum management for dairy calves. Veterinary Clinics of North America: Food Animal Practice. 2008;24(1):19–39.
• Ulfman LH, Leusen JHW, Savelkoul HFJ, Warner JO, van Neerven RJJ. Effects of Bovine Immunoglobulins on Immune Function, Allergy, and Infection. Frontiers in Nutrition. 2018;5:52.
• Jones AW, Cameron SJ, Thatcher R, Beecroft MS, Mur LAJ, Davison G. Effects of bovine colostrum supplementation on upper respiratory illness in active males. Brain, Behavior, and Immunity. 2014;39:194–203.

For general information only, not medical advice. Statements have not been evaluated by the FDA. Colostrum supplements are not intended to diagnose, treat, cure, or prevent any disease. Talk to a healthcare provider before starting a supplement, especially if you have a dairy allergy.