24 and have clicking sound in my knees?

Clicking of bones may be a sign of early bone and joint problem.

Taking vitamin D will help your body to absorb calcium, but your diet have to be rich in calcium.

It is not too late to build up your leg muscles for better support.

Suck in your stomach when you walk or climbing staircases, it will transfer more load and pressure to your tights and hip.

Doing the above may help delaying the deterioration process, take care.

You need calcium to go with the vitamin D. Vitamin D helps the calcium to work in your body effectively. That's why vitamin D is added to milk. So it might be helpful to you to get some calcium from another source such as: cheese, ice cream, other milk products. At 24, you probably have a long time left on earth - so get that calcium in your body! There are also over the counter calcium with vitamin D pills available. I have to take them because I am over 50.

clicking isnt too much of a problem,but pain and swelling has well has isnt a good sign, try some not so very deep squats and others to strenghten your knee so has to not put so much strain on your joint