camellia seed oil in your hair care products? Is it because it's been used for hundreds of years by Japanese women on their hair? And if so, what the heck does that phrase mean? Think about it for a moment...I could say that women have been using CP soap in their hair for centuries and it doesn't mean a thing! They could have loved it or hated it, but without some kind of definition - women have been using and loving camellia oil for centuries - it means nothing!
For fun, take a look at the bottom of the screen when you see any shampoo or conditioner products. Almost all of them say your hair feels healthier or looks shinier or seems nicer in some way "when compared to women who used non-conditioning shampoo" or "when compared to shampooing alone". I could wash my hair with a terrible shampoo followed by a conditioner and my hair will likely feel better than when I've used a really great shampoo without conditioner. We know that conditioner is a really vital part of our hair care process, so leaving it out means you're going to have hair that generally doesn't feel very nice. This claim means nothing!
And consider this - what does "clinically proven" really mean? It generally means that some kind of study was done by someone who might be a scientist, but it doesn't mean that it was a sound study that had actual control groups or was well conducted. You'll notice that most of the things that are clinically proven are subjective - women reported that in two weeks their skin felt smoother, women reported that in three weeks their skin looked more alive, and so on.
When I gave my family doctor some bath & body products, she told me that they were just lovely and made her skin feel nice. I joked that my new labels for my body wash would have a claim that 100% of the doctors surveyed felt this product made their skin feel nice! The scary thing is that I think I could get away with it!
Please don't make claims about your products. You aren't allowed to say they cure or heal anything - for instance, eczema or dandruff - because those are drug claims. You are allowed to say cosmetic things about your products - that skin looked smoother or that you preferred this to another shampoo - because we're making cosmetics, not drugs. If you're in business, I really suggest you consult the health agency in your country to ensure you aren't breaking the rules because it really can be difficult to figure out what is a health claim and what is a cosmetic claim. Something "soothes dry skin" could be a drug claim where you live!
cuticle balm that friends report helps cracked fingertips heal - but using that kind of language is simply not okay!
If you are really interested in learning more about how to evaluate claims and studies, I really recommend Ben Goldacre's page Bad Science and the book by the same name, and this e-book of Testing Treatments. It makes you realize it's not just cosmetics companies making all kinds of claims!
What does "coconut derived" really mean?
Defining your product by what's NOT in it!
Much maligned ingredients (a series) - part 1
What's the difference between moisturizing and hydrating?
What does "clinically proven" really mean?
Ben Goldacre's blog - Bad Science
What does "dermatologist tested" or "clinically proven" mean? (Personal Care Truth)