Onion Extract Scar Creams like Mederma, do they work?

So called benefits of onion extract based scar creams are the anti-inflammatory characteristics and the fact that it should reduce the production of collagen in a scar. (Collagen are protein fibers of which a scar is made of.) Mederma is such a onion based topical gel. The company claims to make scars smoother, less noticable and softer. However studies conducted have shown that onion extract or allium cepa did not benefit the appearance of scars. Other studies also determined that in some cases onion extract had a detrimental effect on scars.

Another study showed that Mederma benefited the collagen structure in scars with injured rabbits. This products scar healing benefits are not that convincing. So would not recommend Mederma. Have to admit I haven't used it myself but I have used other creams and most them didn't do much for me.

There are many comments and reviews in which people state they use a product like Mederma and it does work. Of course that is possible but I think it is because of the moisturizing characteristics of the product and because of the fact that manipulating the tissue (massage) the blood flow will increase.

Something about effective ways of fading scars on Squidoo. And some more info here.