According to Birchbox, "Copper encourages collagen production and skin regeneration, while gluconic acid and eliminates harmful micro-organisms and lemon peel oil cleanses without stripping skin." [sic]
|My Birchbox sample of the PUR Facial Wash|
Gluconic acid is an acidity regulator that is naturally occurring in fruit, honey, and wine. It is commercially used for a variety of things that range from floor cleaners to neutering puppies.
|It's for your own good, Ralph!|
|pH of PUR Facial Wash|
Lemon Peel Oil
Although some suggest that lemon peel oil may cause photosensitivity, if there are any problems, they are clearly far less hazardous than straight lemon juice. However, I can't find any empirical evidence that lemon peel oil does anything beneficial except smell pretty.
The claim about copper is the big "OMGWHATAREYOUEVENDOINGHEADDESK" claim associated with this product. Again, the claim is that "copper encourages collagen production".
Like most Beauty Bullshit claims, this doesn't come completely out of nowhere.
|Lysyl oxidase protein structure|
Thus, it is clear that your body must have copper in order for successful collagen production to occur.
What's more, it's highly unlikely that any topical copper substance will affect your collagen production. I can find no evidence that anyone has examined topical copper and collagen, but the studies that do look at topical copper consistently find it doesn't do much of anything for your skin.
Furthermore, although copper is necessary for proper LOX functioning, the only reason you wouldn't have sufficient copper is if you have a dietary copper deficiency. Given that copper is in foods ranging from chocolate to nuts to herbs to leafy vegetables, it is unlikely that you will acquire a copper deficiency unless you also have other very severe medical conditions. Thus, copper is not a particularly useful mechanism for increasing collagen.
|"It's not because I'm gluttonous; it's because I'm vain!"|
It is clear that all three LaFace ingredients that have been highlighted here are advertised using demonstrably false claims.
If you have any beauty claims you want researched in future Beauty Bullshit blogs, feel free to leave them in the comments below.