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Condition

Acute Nonspecific Knee Pain

Acute nonspecific knee pain is knee soreness without an obvious structural cause like a ligament tear, often from overuse, strain, or muscle imbalance. Among supplements, bromelain, boron, and glucosamine have the most to show: inflammation went down with bromelain, knee pain improved with boron, and rehabilitation rates improved with glucosamine. Still, the evidence is limited, since these studies were small, with 60 to 102 people each.

Sources: PMID 24940052

Supplements studied
3
Graded outcomes
4
Trials
3
People studied
239

Evidence by supplement

  • Strong
  • Moderate
  • Limited
  • Very limited

3 supplements

Boron: outcomes studied for Acute Nonspecific Knee Pain
GradeOutcomeEffectSizeStudiesPeopleStudies list
Pain

Moderate Improvement

Improves (the measure goes down)Moderate effect1 study60 people
Range of Motion

Moderate Increase

Improves (the measure goes up)Moderate effect60 people
Bromelain: outcomes studied for Acute Nonspecific Knee Pain
GradeOutcomeEffectSizeStudiesPeopleStudies list
Inflammation

Small Decrease

Improves (the measure goes down)Small effect77 people
Muscle SorenessChanges; see studies2 studies77 people
Subjective Well-BeingImproves (the measure goes up)77 people
Glucosamine: outcomes studied for Acute Nonspecific Knee Pain
GradeOutcomeEffectSizeStudiesPeopleStudies list
Injury Rehabilitation Rate

Small Improvement

Improves (the measure goes up)Small effect102 people
Range of MotionImproves (the measure goes up)1 study102 people

Studies that measured range of motion

Key findings

  • PainBoronImproves (the measure goes down)
  • InflammationBromelainImproves (the measure goes down)
  • Injury Rehabilitation RateGlucosamineImproves (the measure goes up)

The Acute Knee Pain Relief & Recovery protocol

2 primary supplements · 6 supporting supplements

  • Curcumin500–1,000 mg enhanced-absorption curcumin 2–3 times daily
  • Bromelain500–2,000 GDU daily between meals

See the full protocol

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Studies cited

37 studies from PubMed

  1. The adjuvant use of calcium fructoborate and borax with etanercept in patients with rheumatoid arthritis: Pilot studyJ Intercult Ethnopharmacol · PMID 28163961
  2. Effects of Calcium Fructoborate on Levels of C-Reactive Protein, Total Cholesterol, Low-Density Lipoprotein, Triglycerides, IL-1β, IL-6, and MCP-1: a Double-blind, Placebo-controlled Clinical StudyBiol Trace Elem Res · PMID 25433580
  3. Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokinesJ Trace Elem Med Biol · PMID 21129941
  4. Effects of boron supplementation on the severity and duration of pain in primary dysmenorrheaComplement Ther Clin Pract · PMID 25906949
  5. Plasma boron and the effects of boron supplementation in malesEnviron Health Perspect · PMID 7889885
  6. Effect of dietary boron on mineral, estrogen, and testosterone metabolism in postmenopausal womenFASEB J · PMID 3678698
  7. Preliminary evidence hints at a protective role for boron in urolithiasisJ Altern Complement Med · PMID 22385047
  8. A double-blind, placebo-controlled pilot study to evaluate the effect of calcium fructoborate on systemic inflammation and dyslipidemia markers for middle-aged people with primary osteoarthritisBiol Trace Elem Res · PMID 21607703
  9. Effect of boron supplementation on blood and urinary calcium, magnesium, and phosphorus, and urinary boron in athletic and sedentary womenAm J Clin Nutr · PMID 7840072
  10. Oral resveratrol and calcium fructoborate supplementation in subjects with stable angina pectoris: effects on lipid profiles, inflammation markers, and quality of lifeNutrition · PMID 23153742
  11. Short-term efficacy of calcium fructoborate on subjects with knee discomfort: a comparative, double-blind, placebo-controlled clinical studyClin Interv Aging · PMID 24940052
  12. Bromelain reduces mild acute knee pain and improves well-being in a dose-dependent fashion in an open study of otherwise healthy adultsPhytomedicine · PMID 12587686
  13. Bromelain as an adjunctive treatment for moderate-to-severe osteoarthritis of the knee: a randomized placebo-controlled pilot studyQJM · PMID 17121765
  14. Therapeutic use, efficiency and safety of the proteolytic pineapple enzyme Bromelain-POS in children with acute sinusitis in GermanyIn Vivo · PMID 15796206
  15. Preliminary comparison of bromelain and Ibuprofen for delayed onset muscle soreness managementClin J Sport Med · PMID 12466693
  16. Effect of combined oral proteases and flavonoid treatment in subjects at risk of Type 1 diabetesDiabet Med · PMID 20002490
  17. Glucosamine therapy for treating osteoarthritisCochrane Database Syst Rev · PMID 15846645
  18. Ayurvedic medicine offers a good alternative to glucosamine and celecoxib in the treatment of symptomatic knee osteoarthritis: a randomized, double-blind, controlled equivalence drug trialRheumatology · PMID 23365148
  19. Comparable clinical outcomes between glucosamine sulfate-potassium chloride and glucosamine sulfate sodium chloride in patients with mild and moderate knee osteoarthritis: a randomized, double-blind studyJ Med Assoc Thai · PMID 20649060
  20. Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritisN Engl J Med · PMID 16495392
  21. Effect of glucosamine hydrochloride in the treatment of pain of osteoarthritis of the kneeJ Rheumatol · PMID 10555905
  22. Double-blind clinical evaluation of oral glucosamine sulphate in the basic treatment of osteoarthrosisCurr Med Res Opin · PMID 7002479
  23. Effectiveness of glucosamine for symptoms of knee osteoarthritis: results from an internet-based randomized double-blind controlled trialAm J Med · PMID 15501201
  24. Long-term effects of glucosamine sulphate on osteoarthritis progression: a randomised, placebo-controlled clinical trialLancet · PMID 11214126
  25. Glucosamine sulfate in the treatment of knee osteoarthritis symptoms: a randomized, double-blind, placebo-controlled study using acetaminophen as a side comparatorArthritis Rheum · PMID 17265490
  26. Glucosamine sulfate use and delay of progression of knee osteoarthritis: a 3-year, randomized, placebo-controlled, double-blind studyArch Intern Med · PMID 12374520
  27. A randomized, double-blind, placebo-controlled trial of glucosamine sulphate as an analgesic in osteoarthritis of the kneeRheumatology · PMID 11934964
  28. Randomized, controlled trial of glucosamine for treating osteoarthritis of the kneeWest J Med · PMID 10693368
  29. Glucosamine sulfate in osteoarthritis of the kneeOsteoarthritis Cartilage · PMID 11548224
  30. Evaluation of glucosamine sulfate compared to ibuprofen for the treatment of temporomandibular joint osteoarthritis: a randomized double blind controlled 3 month clinical trialJ Rheumatol · PMID 11409130
  31. No effect of glucosamine sulfate on osteoarthritis in the temporomandibular joints--a randomized, controlled, short-term studyOral Surg Oral Med Oral Pathol Oral Radiol Endod · PMID 22001199
  32. Evaluation of Glucosamine sulfate and Ibuprofen effects in patients with temporomandibular joint osteoarthritis symptom.J Res Pharm Pract · PMID 24991602
  33. Glucosamine oral administration as an adjunct to hyaluronic acid injection in treating temporomandibular joint osteoarthritis.Oral Dis · PMID 28862770
  34. Kashin-Beck disease in Sichuan, China: report of a pilot open therapeutic trialJ Clin Rheumatol · PMID 22157279
  35. Chondroitin sulfate and/or glucosamine hydrochloride for Kashin-Beck disease: a cluster-randomized, placebo-controlled studyOsteoarthritis Cartilage · PMID 22469850
  36. Glucosamine administration in athletes: effects on recovery of acute knee injuryRes Sports Med · PMID 17578751
  37. Evaluation of the effect of glucosamine administration on biomarkers for cartilage and bone metabolism in soccer playersInt J Mol Med · PMID 19724889