I am 33 &work out 4 to 5 days per week with cardio&weights.i weigh 90 kg&my body fat is 30%.i take collagen pills&genuphil.recently i feel a lot of ache in my knees.when i bend it to pray or to go down the stairs it hurts. i am also sexually inactive?

Weight: You are overweight and it would be useful to lose weight, not easy, but essential. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV and Covid vaccines. Wish you good health!