It is important to listen to the recommendations of your physiotherapist and discuss with your healthcare provider before starting any new supplements, especially if you are taking other medications or have specific health conditions. While collagen and omega-3 supplements may be commonly used for joint health, it is important to note that there is limited scientific evidence regarding their effectiveness for conditions like arthritis or knee injuries. If you decide to try these supplements, it is advisable to space out the intake of collagen from other medications. Additionally, it is recommended to follow the dosing instructions provided by the manufacturer of the product you choose.