I’ve tried out a lot of products in the past that are said to aid muscle recovery and reduce soreness, from bath soaks to arnica creams. None of them were noticeably effective at all, and in any instances where I detected a negligible difference in my recovery, I could never say with any kind of certainty that my recovery was down to a single product; it could just as likely have been due to eating better or getting more sleep.

Except for one.

But first, here's what you need to know about transdermal supplementation....

I was lucky enough to spend a week in Rio de Janeiro with Swisse - the official vitamin choice of Team GB - soaking up Brazilian culture and the excitement of the 2016 Olympic Games.

The Olympic Games represent health, fitness and dedication like nothing else and it was incredible to feel a part of them when in Rio.

Of course, the Olympics only last a couple of weeks in August, and the Paralympics a couple of weeks in September 2016, so not everyone will have the opportunity to experience them when visiting Rio de Janiero. Thankfully, there are lots of other things you can do if you want to experience a fit, healthy and inspiring trip to Rio...

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