The aim of the present investigation is to evaluate the efficacy of Mangoselect®, a mangosteen extract, and of a formulation containing Mangoselect®, in subjects suffering from activity/exercise-induced knee joint pain/discomfort, during a 12-week supplementation period. Subjective discomfort improvement will be assessed with both WOMAC questionnaire and pain Visual Analogic Scale (VAS); functional joints features, quality of life, and inflammatory markers, will also be assessed. Finally, long lasting benefits will additionally be evaluated 4 weeks after the end of the supplementation period. The design of the study is double-blind, randomized, multi-arm, parallel and placebo controlled.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
QUADRUPLE
Enrollment
95
Placebo product is 100% maltodextrin. Daily dosage is 500 mg in 2 capsules.
Verum A is 200 mg of mangosteen extract. Daily dosage is 200 mg in 2 capsules.
Verum B is 400 mg of mangosteen extract. Daily dosage is 400 mg in 2 capsules.
Verum C is 200 mg mangosteen extract + 300 mg grape extract. Daily dosage is 500 mg in 2 capsules.
UCAM (Universidad Catolica San Antonio de Murcia)
Murcia, Spain
Change in knee joint pain subscale from WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index) questionnaire
Time frame: 12 weeks
Change in knee joint subjective pain rating using a VAS (Visual Analog Scale) 0-10 cm
Time frame: 12 weeks
Change in knee joint stifness subscale from WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index) questionnaire
Time frame: 12 weeks
Change in knee joint physical functionning subscale from WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index) questionnaire
Time frame: 12 weeks
Change in knee mobility assessed with ROM (Range of Motion) assessment
Time frame: 12 weeks
Change in muscular strength assessed with isokinetic strength measurment
Time frame: 12 weeks
Change in inflammatory status assessed with TNF-alpha plasma concentration
Time frame: 12 weeks
Change in inflammatory status assessed with TNF-alpha receptor R1 plasma concentration
Time frame: 12 weeks
Change in inflammatory status assessed with TNF-alpha receptor R2 plasma concentration
Time frame: 12 weeks
Change in inflammatory status assessed with IL-1beta plasma concentration
Time frame: 12 weeks
Change in inflammatory status assessed with IL-1beta receptor p68 plasma concentration
Time frame: 12 weeks
Change in inflammatory status assessed with IL-1beta receptor p80 plasma concentration
Time frame: 12 weeks
Change in quality of life assessed with SF-12 questionnaire
Time frame: 12 weeks
Change in pain killer drug consumption assessed with daily diary
Time frame: 12 weeks
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