Oral Supplementation Compared With Hyaluronic Acid Infiltration in Rotator Cuff Tendinopathies

The Group 1 (G1) will begin taking a dietary supplement the day after enrollment.

Group 2 (G2) will receive three intra-articular injections once per week for 3 weeks, without ultrasound guidance. The route of administration will be intra-articular via the posterior access route.