There are a lot of collagen products appearing on the market within joint supplement formulations as well as supplements that come with the promise of younger looking skin. The latter especially appears in many perfectly-packaged forms from drinks to jellies.

I was intrigued as to whether there was any difference between the supplements on offer, in format, dosage and price. Most importantly though, I wanted to look into the evidence base to find out whether I could expect them to really work.

So, here's everything that I think you should know about collagen, plus reviews of some of your best supplement options