MicroLactin (hyperimmune milk protein)
Summary
MicroLactin is a proprietary milk protein concentrate from cows given repeated immunisations. In an 8-week, maker-funded trial of 58 adults with activity-related knee pain, 4 g a day improved discomfort scores and walking distance versus placebo (grade D). An earlier beverage trial in knee osteoarthritis was small. It is a milk product, unsuitable for milk allergy.
Key facts
- 58 adults with knee pain: 4,000 mg/day for 8 weeks improved WOMAC items and 6-minute walk distance versus placebo[1]
- Lactose-free milk protein concentrate from hyperimmunized cows, retaining immunoglobulins and smaller bioactive molecules[1]
- A 6-week trial of a hyperimmune-milk beverage in 31 people with knee osteoarthritis improved WOMAC scores[2]
- The 2019 trial was funded by the ingredient maker, which also supplied the product[1]
- 2 graded human outcomes on this page
- October 13, 2026
How it works
ProposedMilk from hyperimmunized cows contains antibodies (immunoglobulins) and low-molecular-weight bioactive compounds proposed to have anti-inflammatory and immune-modulating effects. How MicroLactin might ease joint discomfort in people has not been established.[1]
What the human research says
Human trials only, one row per outcome. The form column shows what each trial actually tested. Grades follow our evidence-grading policy.
| Outcome | Effect | Grade | Best evidence | PMID |
|---|---|---|---|---|
| Knee discomfort (WOMAC, visual analogue scales) and 6-minute walk distance | Improved | Grade D | RCT · n = 58 · 2019 Adults aged about 42–46 with mild to moderate knee pain during activity but no osteoarthritis diagnosis Form: MicroLactin milk protein concentrate from hyperimmunized cows, in capsules · Dose: 4,000 mg/day (2,000 mg twice daily) · Duration: 8 weeks 6-minute walk distance improved 9% vs 2% with placebo (about 110 m difference), and 11 WOMAC items and 5 discomfort scales improved versus placebo. Blood safety markers stayed normal. | 30696041 (opens PubMed)Source [1] |
| Knee osteoarthritis symptoms (WOMAC composite from KOOS) | Improved | Grade D | RCT · n = 31 · 2002 Adults with osteoarthritis of both knees Form: Beverage of milk-based micronutrients from hyperimmunized cows, fortified with vitamins and minerals · Dose: 12 oz/day · Duration: 6 weeks The WOMAC composite improved more than with placebo (moderate effect size 0.56); safety indicators did not change. | 11985942 (opens PubMed)Source [2] |
Forms
| Form | Elemental % | Absorption (human data) | GI tolerance | Studied for |
|---|---|---|---|---|
| MicroLactin capsules (milk protein concentrate) | Varies[1] | No human absorption data.[1] | Blood safety markers stayed within normal ranges at 4,000 mg/day for 8 weeks.[1] | Knee discomfort and function |
| Hyperimmune milk beverage | Varies[2] | No human absorption data.[2] | Safety indicators were unchanged over 6 weeks.[2] | Knee osteoarthritis symptoms |
| Joint blends containing MicroLactin | Varies[4] | No data.[4] | Not studied; blends may contain shellfish-derived glucosamine.[4] | Not studied as blends |
Studied doses
Doses studied in human trials ranged from 12 oz a day of a hyperimmune-milk beverage for 6 weeks to 4,000 mg a day of MicroLactin capsules (2,000 mg twice daily) for 8 weeks.[1][2]
Interactions
Published interactions only: each row cites a source. No row means none was found in our sources, not that a combination is safe.
None found in our sources.
Who should be careful
- Milk allergy
- MicroLactin is a milk protein concentrate; milk allergy is an immune reaction to milk, and being lactose-free does not make it safe for allergy.[1][3]
- Shellfish allergy (combination products)
- Some joint blends that contain MicroLactin also contain shellfish-derived ingredients.[4]
Talk to your pharmacist or clinician before starting a supplement, especially if you take prescription medicines.
How to read the label
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Frequently asked questions
What is MicroLactin?
A proprietary, lactose-free milk protein concentrate made from the milk of cows given repeated immunisations, retaining antibodies and other milk bioactives.[1]
Does MicroLactin help knee pain?
In one 8-week trial of 58 adults with activity-related knee pain, 4,000 mg a day improved discomfort scores and 6-minute walk distance versus placebo. The trial was funded by the maker.[1]
Has it been tested in osteoarthritis?
A small 6-week trial of a hyperimmune-milk beverage in 31 people with knee osteoarthritis improved WOMAC scores, but the drink also contained added vitamins and minerals.[2]
Can people with milk allergy take it?
No. It is a milk protein product; lactose-free only addresses lactose intolerance, not milk allergy.[1][3]
How much is used in studies?
4,000 mg a day, taken as 2,000 mg twice daily, in the 2019 trial.[1]
Sources
- [1]Proprietary Milk Protein Concentrate Reduces Joint Discomfort While Improving Exercise Performance in Non-Osteoarthritic Individuals.. Nutrients, 2019. RCT
- [2]Effects of a milk-based bioactive micronutrient beverage on pain symptoms and activity of adults with osteoarthritis: a double-blind, placebo-controlled clinical evaluation.. Nutrition, 2002. RCT
- [3]Definition & Facts for Lactose Intolerance (lactose intolerance differs from milk allergy, an immune system disorder). National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), 2018. fact-sheet
- [4]Aid 4 Joints (Pure Advantage), DSLD label 180769: 400 mg MicroLactin per 4-capsule serving, with glucosamine sulfate 1,000 mg, MSM 800 mg, Cissus quadrangularis 500 mg and bromelain 250 mg; contains shellfish. NIH Office of Dietary Supplements, Dietary Supplement Label Database, 2019. label
What changed
- Independent adversarial review: knee-discomfort row regraded C to D; it is a single small (58-person), maker-funded trial, which the grading rubric places at D.
- Strict adversarial pass: PMIDs re-checked; 2019 dose (2,000 mg twice daily) and maker funding confirmed in the PMC full text. Removed unverified affiliation claims about the 2002 trial; milk-allergy caution kept.
- First draft rebuilt from scratch after the earlier draft files were lost. Every PMID checked against NCBI esummary and abstracts read; dose, capsule count and funding of the 2019 trial confirmed in the PMC full text. Label amount re-read from the DSLD API as 400 mg MicroLactin per 4-capsule serving.