Our ARMRA colostrum review comes down to this: ARMRA is a well-made, third-party-tested bovine colostrum powder, but the product itself has no published, placebo-controlled trial. Its headline numbers, such as 86% reporting less bloating, come from an open-label survey of 60 people taking 2 g a day[1]. The independent colostrum trials behind its gut and immune claims mostly used 10 to 60 g a day.
At $83.99 to $119.99 for a 120-serving jar, ARMRA colostrum works out to roughly $0.70 to $1.00 per gram[1]. That makes the survey dose $1.40 to $2.00 a day, and a dose that matches most trials far more.
Below: what is in the jar, what ARMRA's own research does and does not show, each benefit claim against the published evidence, side effects, cost per gram, and how it compares with Cowboy Colostrum.
How we reviewed ARMRA
We read ARMRA's product page and its benefits page in October 2026 for the ingredients, directions, price and study claims[1][2]. We searched PubMed and Crossref for any published study of ARMRA, then read the systematic reviews and randomized trials of bovine colostrum for gut permeability, digestive symptoms, immunity, body fat and IGF-1. For the comparison, we read Cowboy Colostrum's product page in the same month[3].
We did not test ARMRA hands-on, we did not receive free product, and this page carries no affiliate links. For bovine colostrum in general, rather than this brand, see our guide to colostrum benefits.
What is ARMRA colostrum, and what is in it?
ARMRA is powdered bovine colostrum, the first milk cows produce after giving birth. The unflavored label lists one ingredient, "Proprietary ARMRA Colostrum Concentrate (Bovine)", with a milk allergen warning[1]. The 4.3-ounce jar holds 120 servings, so each serving is about 1 g.
Here is what the product page states, as retrieved in October 2026[1]:
- Processing: a "Cold-Chain BioPotent" pasteurization method, which is not described, and a process that "removes certain compounds". The page lists "no fat".
- Sourcing: grass-fed cows on US family farms, with "calf-first" collection of overflow colostrum after calves are fed.
- Testing: made in FDA-registered facilities under current good manufacturing practices, and tested by third-party ISO/IEC-certified labs for heavy metals, contaminants and microbes.
- Directions: stir into liquid or food that is not hot, or dry-scoop the unflavored powder.
- Formats: unflavored jars, flavored jars such as Vine Watermelon and Sungold Apricot, and 30-packet travel sticks, including a Health Revival Blood Orange version.
- Not listed: the percentage of immunoglobulin G (IgG), the main antibody in colostrum. The page names IgA and IgG but gives no amount.
Why the processing details matter
Raw bovine colostrum is about 14% to 16% protein, versus about 3% in mature milk, and holds 42 to 90 mg/mL of immunoglobulins[4]. It also contains lactoferrin, growth factors such as IGF-1, and about 2% to 3% lactose. Many growth factors fall sharply within 48 to 72 hours after calving[4].
Heat also matters. In a 2020 lab study, high-temperature short-time pasteurization raised IgG denaturation to about 40%, while low-temperature long-time pasteurization did not significantly increase it[5]. Gentle processing can preserve more of colostrum's proteins, but ARMRA does not publish its method, temperatures or IgG content, so a buyer cannot check this claim.
What does ARMRA's own research show?
ARMRA's numbers come from its own survey, not a published trial. The product page reports that 86% of users had less bloating, 79% had digestive relief and 79% noticed thicker hair[1]. These findings came from "an open-label clinical research survey of 60 participants aged 18-65 consuming 2g of ARMRA Colostrum daily" over 3 months.
The benefits page names the work as a twelve-week, parallel-group study from 2023 and cites a 2021 study by GS Jensen as research with ARMRA colostrum[2]. When we searched PubMed and Crossref in October 2026, we found neither study and no other published ARMRA trial.
Three limits follow from the design:
- Open-label: everyone knew they were taking ARMRA, which invites expectation effects on bloating, energy and hair.
- Survey outcomes: results are self-reported impressions, not measured permeability, stool records or hair counts.
- No published comparison group: the page calls it "dual-arm", but the second arm's results are not shown.
US law does not require a supplement company to show its evidence to the FDA before selling a product. The company must hold substantiation that its structure and function claims are truthful and not misleading[6].
Does ARMRA colostrum work? Claims vs. the research
No study can say whether ARMRA itself works, because none has been published[2]. The fairer question is whether bovine colostrum works for each claim, and at what dose. The table below summarizes the independent evidence.
| ARMRA claim | What independent research shows | Dose in those studies |
|---|---|---|
| Strengthens the gut barrier | Meta-analysis of 10 trials: small drop in one permeability test, with very high variation; one trial found permeability rose | 500 mg to 60 g a day |
| Less bloating, digestive relief | Fewer diarrhea episodes in 15 of 20 trial arms; no benefit in one small IBS trial; bloating itself rarely measured | Varied |
| Immune support | 44% fewer days with cold-like symptoms in exercising adults, from 5 small trials | Varied |
| Thicker hair | No published trial of oral colostrum for hair | None |
| Metabolism and body composition | 13 trials: small, inconsistent effects on body fat | 10 to 60 g a day |
Gut barrier and intestinal permeability
This is the claim with the most trial data, and it is mixed. A 2024 meta-analysis of 10 randomized trials in athletes and patients found that colostrum lowered the lactulose-to-rhamnose ratio, a urine test of gut permeability. The difference was modest, with extreme variation between studies (I² of 99%), and a blood marker of gut injury did not change[7].
Here is how the results differ by setting:
- NSAID painkillers: in 7 healthy men taking indomethacin for 5 days, permeability tripled with a whey control but did not rise significantly with colostrum[8].
- Heavy exercise: in 12 volunteers, 14 days of colostrum cut the exercise-related rise in permeability by 80%[9].
- Low dose in athletes: 500 mg a day for 20 days brought a permeability test back into the normal range in 16 athletes in peak training[10].
- Running training: in 30 men taking 60 g a day for 8 weeks, permeability rose 251% with colostrum, versus 21% with whey[11].
These trials enrolled athletes or people taking NSAIDs, mostly men, for days to weeks[7]. None tested the general wellness buyer ARMRA markets to. If gut permeability is your concern, our leaky gut page explains what the term does and does not mean, and our guide to enhanced epithelial barrier function covers the options with stronger evidence.
Bloating and digestive symptoms
The published evidence is strongest for diarrhea, not everyday bloating. A 2024 systematic review of 22 clinical trials with 1,427 patients found that colostrum reduced diarrhea frequency in 15 of 20 trial arms and reduced stool frequency in all 7 studies that measured it[12]. Abdominal pain improved in 4 trial arms but not in 5 others, and the authors called the evidence limited and mixed.
In the only randomized trial in IBS we found, 18 patients took colostrum or placebo. Symptom relief at 4 weeks was 55.5% versus 44.4%, a difference that was not statistically significant, and the authors concluded colostrum had no benefit[13]. For bloating specifically, the trial record for probiotics for bloating is more direct than anything published for colostrum.
Immune support
Colostrum's evidence for the immune system comes almost entirely from people in regular exercise training, which is also why it is sold for athletic performance. A meta-analysis of 5 trials with 152 participants found 44% fewer days with upper respiratory symptoms and 38% fewer episodes over 8 to 12 weeks[14]. Four of the five trials had a moderate or high risk of bias.
A separate meta-analysis of 10 trials in 239 athletes found little or no effect on blood or saliva antibody levels or immune cell counts[15]. So the symptom signal is real but small-sample, and how it works is unclear. Our page on strengthened mucosal immunity covers how antibodies such as IgA act on gut and airway linings.
Hair, skin and weight
ARMRA's hair claim has no trial behind it. A PubMed search for randomized trials of oral bovine colostrum for hair growth returned no results in October 2026, so the 79% "thicker hair" figure rests only on the company's open-label survey[1].
For body composition, a 2026 systematic review of 13 trials found only small, inconsistent effects. One trial in older adults taking 60 g a day for 8 weeks saw body fat fall by 0.4%[16]. The reviewers called for trials lasting at least 6 months before drawing conclusions.
The microbiome angle
Colostrum may also feed gut bacteria, but this evidence is early. Bovine colostrum contains oligosaccharides that may act as prebiotics, and one milk-derived peptide promotes the growth of Bifidobacterium longum subsp. infantis in lab studies[4]. No human trial has shown that a 1 to 2 g daily serving changes the adult gut microbiome.
The dose gap: 1 to 2 grams vs. the doses studied
This is the biggest problem with ARMRA's evidence story. Most of the independent studies used 10 to 60 times more colostrum than ARMRA's 2 g survey dose[17][11].
| Study | Daily dose | ARMRA servings (about 1 g each) |
|---|---|---|
| ARMRA survey, 60 adults, 3 months[1] | 2 g | 2 |
| Permeability trial, 16 athletes, 20 days[10] | 500 mg | Half |
| IGF-1 safety trials, 4 and 12 weeks[17] | 20 g | 20 |
| Running trial, 30 men, 8 weeks[11] | 60 g | 60 |
| Body fat trial in older adults, 8 weeks[16] | 60 g | 60 |
One low-dose trial did report a permeability benefit at 500 mg a day, in 16 athletes in peak training[10]. One small trial is not enough to show that ARMRA's dose produces the effects reported at 20 to 60 g.
How much does ARMRA cost per gram?
Prices from ARMRA's product page in October 2026, for the 120-serving unflavored jar[1]:
| Daily amount | One-time price ($119.99 a jar) | Subscription ($83.99 a jar) | How long a jar lasts |
|---|---|---|---|
| 1 g (1 serving) | $1.00 a day | $0.70 a day | 120 days |
| 2 g (survey dose) | $2.00 a day | $1.40 a day | 60 days |
| 20 g (IGF-1 trials) | $20.00 a day | $14.00 a day | 6 days |
Flavored jars cost more: $129.99 one-time, and the peach persimmon jar holds 90 servings in 6.3 ounces because flavorings take up part of each scoop[1]. The page also advertises "as low as $0.87" per serving, which depends on jar size and discounts.
Is there a downside to taking ARMRA colostrum? Side effects and safety
For most healthy adults, bovine colostrum appears well tolerated in trials, and a review describes it as having a strong safety profile[4]. The real cautions are specific.
- Milk and dairy allergies: the label carries a milk allergen warning[1]. ARMRA says it removes "certain compounds" but does not state that all milk proteins are gone, so people with a milk protein allergy should avoid it unless their allergist agrees.
- Lactose intolerance: colostrum contains about 2% to 3% lactose[4]. A 1 to 2 g serving is far below the 12 g of lactose, about a cup of milk, that many people with lactose intolerance tolerate with mild or no symptoms[18].
- Digestive changes: in trials of people with diarrhea, colostrum tended to reduce stool frequency rather than loosen stools[12]. Stop if you notice new or worsening symptoms.
Does it raise IGF-1, and why is it banned by the NCAA?
Bovine colostrum is rich in IGF-1, but drinking it has not raised blood levels in trials. In placebo-controlled studies, 20 g a day for 4 or 12 weeks did not change plasma IGF-1[17]. Nine endurance athletes taking 60 g a day for 4 weeks also showed no change and tested negative on drug screens[19].
Sport rules are a separate issue. The NCAA lists IGF-1 among banned peptide hormones and names colostrum as an example source[20]. The US Anti-Doping Agency notes that WADA cannot guarantee oral IGF-1 products will not cause a positive test[21]. Tested athletes should skip it unless their governing body clears it.
What about the calves?
Calves depend on colostrum. Colostrum management is the single most important factor in calf health and survival, and calves need enough clean, high-quality colostrum within the first few hours of life[22]. ARMRA says it collects only overflow colostrum after calves are fully fed[1]. It does not publish independent verification of that policy.
Who might reasonably try ARMRA, and who should skip it?
ARMRA is a reasonable experiment only for a narrow group, and even then the supporting trials used higher doses than its label[14][17].
Might reasonably try it:
- Adults in heavy training who get frequent colds, the group with the most trial data[14].
- Adults who want colostrum, can afford it, and prefer a product with stated third-party contaminant testing[1].
Should skip it or ask a clinician first:
- People with a milk protein allergy.
- NCAA and other drug-tested athletes[20].
- People who are pregnant or breastfeeding, since no ARMRA data exist for them.
- Anyone with ongoing diarrhea, blood in the stool, weight loss or persistent abdominal pain: these need a medical workup, not a supplement.
- People with IBS hoping for symptom relief, given the negative trial[13].
ARMRA vs. Cowboy Colostrum and other options
The clearest measurable difference between brands is the colostrum dose per serving. Both product pages were retrieved in October 2026.
| ARMRA (unflavored) | Cowboy Colostrum (unflavored) | |
|---|---|---|
| Colostrum per serving | About 1 g[1] | 3 g[3] |
| Processing | Fat removed, undisclosed method | "Unstripped and full of fat"[3] |
| Collection | Overflow after calves are fed | First-day surplus after calves get their share[3] |
| Third-party testing | Heavy metals, contaminants, microbes | Heavy metals, pesticides, contaminants |
| Price per jar | $119.99, or $83.99 subscribed | $69, or $51.75 subscribed |
| IgG percentage listed | No | No |
Cowboy's page did not list servings per jar in the text we retrieved, so we could not calculate its cost per gram[3].
Does Cowboy Colostrum actually work?
It is in the same position as ARMRA. The Cowboy product page we retrieved did not cite a published placebo-controlled trial of its powder[3]. Its 3 g serving is closer to, but still below, the 10 to 60 g used in most colostrum trials[16].
What is the best brand of colostrum to take?
No brand has been shown to beat another, because no head-to-head trials exist. Compare products on what you can check: grams of colostrum per serving, a stated IgG figure, third-party testing and cost per gram, rather than survey percentages. Bovine colostrum's IgG content varies widely, from 34 to 87 g per liter for its main subtype, so a stated figure is useful[4].
Is ARMRA colostrum worth it?
For most people, probably not. ARMRA appears to be a clean, tested product, but its evidence is an unpublished open-label survey. Its dose of 1 to 2 g is far below what most independent trials used, and matching those doses would cost $14 to $20 a day[1][17].
If you want to try it, set a 3-month limit at the label dose, track one specific outcome such as colds or stool frequency, and stop if nothing changes. For gut symptoms, a diagnosis and the approaches in our leaky gut and IBS guides are better first steps than a $1-a-day powder.
This article is for general educational purposes and is not medical advice. Product details, prices and claims come from the manufacturers' pages as retrieved in October 2026 and may change. Talk to a qualified healthcare professional before starting colostrum, particularly if you are pregnant, immunocompromised, taking prescription medication, managing a diagnosed condition, or subject to sports drug testing.
Frequently Asked Questions
How much ARMRA colostrum should I take per day?
ARMRA's jar holds 120 servings of about 1 g each, and its own survey used 2 g a day. No independent trial has tested ARMRA at any dose. For comparison, published bovine colostrum trials mostly used 10 to 60 g a day, though one 20-day trial in 16 athletes used 500 mg. If you take it, follow the label and do not assume more scoops means proven benefit.
Is ARMRA colostrum FDA approved?
No. ARMRA is sold as a dietary supplement, and the FDA does not have the authority to approve dietary supplements before they are marketed. Companies are responsible for safety and must have substantiation for structure and function claims, but they generally do not have to show the FDA that evidence first. ARMRA's own pages carry the standard notice that its statements have not been evaluated by the FDA.
Why is colostrum banned by the NCAA, and why do athletes drink it?
The NCAA lists IGF-1 among banned peptide hormones and growth factors and names colostrum as an example source. The US Anti-Doping Agency adds that WADA cannot guarantee oral IGF-1 products will not cause a positive test. Athletes use colostrum mainly because a meta-analysis of five small trials in exercising adults found about 44% fewer days with upper respiratory symptoms. Tested athletes should check with their governing body before taking it.
Does colostrum increase growth hormones?
Bovine colostrum contains IGF-1, a growth factor, but trials have not found that drinking it raises blood IGF-1. In placebo-controlled studies, 20 g a day for 4 or 12 weeks did not change plasma IGF-1, and 60 g a day for 4 weeks in endurance athletes did not change IGF-1 or produce positive drug tests. ARMRA's 1 to 2 g serving is far smaller than those doses.
Is colostrum hard on the kidneys?
None of the colostrum trials we reviewed reported kidney problems, and an ARMRA serving is about 1 g of powder, a very small amount of protein. Those trials did not enroll people with chronic kidney disease, though. If you have kidney disease or have been told to limit protein, ask your nephrologist or dietitian before adding any protein-based supplement.
Can you take ARMRA colostrum while pregnant?
There is no published ARMRA study in pregnant or breastfeeding people, and ARMRA's survey enrolled adults aged 18 to 65 without reporting results for pregnancy. Because there is no product-specific safety data for this group, ask your obstetric clinician before starting it. Food-based nutrition and your prenatal care plan come first.
Is there a better colostrum than ARMRA?
No brand has been shown to work better than another, because no head-to-head trials exist. Compare products on what you can check: grams of colostrum per serving, whether the IgG percentage is stated, third-party testing, and cost per gram. Cowboy Colostrum lists 3 g per serving versus ARMRA's roughly 1 g, for example. A higher dose per dollar is the main measurable difference between brands.
How long does ARMRA colostrum take to work?
ARMRA's survey reported results over 3 months. Independent trials ran from 14 days, in a gut permeability study of athletes, to 8 to 12 weeks in trials of upper respiratory symptoms, at much higher doses than ARMRA's. If you see no change after about 3 months at the label dose, the published evidence gives little reason to expect one later.
References
- ARMRA. ARMRA Colostrum Unflavored Jar. ARMRA (manufacturer website), retrieved October 2026. 2026. Available at: https://armra.com/products/armra-unflavored-jar ↩
- ARMRA. 5 Benefits of ARMRA. ARMRA (manufacturer website), retrieved October 2026. 2026. Available at: https://armra.com/pages/5-benefits-of-armra-1 ↩
- Cowboy Colostrum. Unflavored Colostrum. Cowboy Colostrum (manufacturer website), retrieved October 2026. 2026. Available at: https://cowboycolostrum.com/products/natures-gold-unflavored-colostrum ↩
- Playford RJ, Weiser MJ. Bovine Colostrum: Its Constituents and Uses. Nutrients. 2021;13(1):265. doi:10.3390/nu13010265 ↩
- Chatterton DEW, Aagaard S, Hesselballe Hansen T, et al.. Bioactive proteins in bovine colostrum and effects of heating, drying and irradiation. Food & Function. 2020;11(3):2309-2327. doi:10.1039/c9fo02998b ↩
- US Food and Drug Administration. Questions and Answers on Dietary Supplements. US Food and Drug Administration. 2026. Available at: https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements ↩
- Hajihashemi P, Haghighatdoost F, Kassaian N, et al.. Bovine Colostrum in Increased Intestinal Permeability in Healthy Athletes and Patients: A Meta-Analysis of Randomized Clinical Trials. Digestive Diseases and Sciences. 2024;69(4):1345-1360. doi:10.1007/s10620-023-08219-2 ↩
- Playford RJ, MacDonald CE, Calnan DP, et al.. Co-administration of the health food supplement, bovine colostrum, reduces the acute non-steroidal anti-inflammatory drug-induced increase in intestinal permeability. Clinical Science. 2001;100(6):627-633. doi:10.1042/cs1000627 ↩
- Marchbank T, Davison G, Oakes JR, et al.. The nutriceutical bovine colostrum truncates the increase in gut permeability caused by heavy exercise in athletes. American Journal of Physiology-Gastrointestinal and Liver Physiology. 2011;300(3):G477-G484. doi:10.1152/ajpgi.00281.2010 ↩
- Hałasa M, Maciejewska D, Baśkiewicz-Hałasa M, Machaliński B, Safranow K, Stachowska E. Oral Supplementation with Bovine Colostrum Decreases Intestinal Permeability and Stool Concentrations of Zonulin in Athletes. Nutrients. 2017;9(4):370. doi:10.3390/nu9040370 ↩
- Buckley JD, Butler RN, Southcott E, Brinkworth GD. Bovine Colostrum Supplementation During Running Training Increases Intestinal Permeability. Nutrients. 2009;1(2):224-234. doi:10.3390/nu1020224 ↩
- Hajihashemi P, Haghighatdoost F, Kassaian N, et al.. Therapeutics effects of bovine colostrum applications on gastrointestinal diseases: a systematic review. Systematic Reviews. 2024;13(1):76. doi:10.1186/s13643-024-02489-1 ↩
- Yoon JY, Park SJ, Cheon JH. Effect of Colostrum on the Symptoms and Mucosal Permeability in Patients with Irritable Bowel Syndrome: A Randomized Placebo-controlled Study. Intestinal Research. 2014;12(1):80. doi:10.5217/ir.2014.12.1.80 ↩
- Jones AW, March DS, Curtis F, Bridle C. Bovine colostrum supplementation and upper respiratory symptoms during exercise training: a systematic review and meta-analysis of randomised controlled trials. BMC Sports Science, Medicine and Rehabilitation. 2016;8(1):21. doi:10.1186/s13102-016-0047-8 ↩
- Główka N, Durkalec-Michalski K, Woźniewicz M. Immunological Outcomes of Bovine Colostrum Supplementation in Trained and Physically Active People: A Systematic Review and Meta-Analysis. Nutrients. 2020;12(4):1023. doi:10.3390/nu12041023 ↩
- Goluch Z, Książek E, Wierzbicka-Rucińska A, Skawina I, Dudkowiak R. The Effects of Colostrum Bovinum Supplementation on Human Body Fat Content and/or Blood Lipid Profile: A Systematic Review of Clinical Trials. Nutrients. 2026;18(10):1579. doi:10.3390/nu18101579 ↩
- Davison G, Jones AW, Marchbank T, Playford RJ. Oral bovine colostrum supplementation does not increase circulating insulin-like growth factor-1 concentration in healthy adults: results from short- and long-term administration studies. European Journal of Nutrition. 2019;59(4):1473-1479. doi:10.1007/s00394-019-02004-6 ↩
- National Institute of Diabetes and Digestive and Kidney Diseases. Eating, Diet, & Nutrition for Lactose Intolerance. NIDDK, National Institutes of Health. 2018. Available at: https://www.niddk.nih.gov/health-information/digestive-diseases/lactose-intolerance/eating-diet-nutrition ↩
- Kuipers H, van Breda E, Verlaan G, Smeets R. Effects of oral bovine colostrum supplementation on serum insulin-like growth factor-I levels. Nutrition. 2002;18(7-8):566-567. doi:10.1016/s0899-9007(02)00800-6 ↩
- National Collegiate Athletic Association. NCAA Banned Substances. NCAA. 2026. Available at: https://www.ncaa.org/what-we-do/health-safety-and-performance/anti-doping-and-substance-misuse-prevention/banned-substances/ ↩
- US Anti-Doping Agency. Natural Products Derived from Plants and Animals. USADA. 2025. Available at: https://www.usada.org/spirit-of-sport/natural-products-derived-plants-animals/ ↩
- Godden SM, Lombard JE, Woolums AR. Colostrum Management for Dairy Calves. Veterinary Clinics of North America: Food Animal Practice. 2019;35(3):535-556. doi:10.1016/j.cvfa.2019.07.005 ↩