Works for Oilier skin types more than Drier.
I mentioned this before but I have studied skin and although I'm not a dermatologist or anything special since studying this and applying my knowledge to my own skin it's been so much better!
In what I learnt is that your skin is all about balance. If you have naturally oily skin, your skin will try to keep itself that way because that's it's normal happy place. Using products that dry it out may work for you in getting rid of acne/pimples but there's a simple step people believe they shouldn't take. And that's applying moisturiser. Moisturiser is incredibly important and for some people this mightn't be the case because everyone is different but on a general scale and for the majority of people this will be the case. No matter your skin type, you should still be applying moisturiser, particularly if you are using products that dry your skin out (toothpaste- why we're here). Your skin wants to balance itself and if you use a product that dries it out your skin (again, toothpaste), it will freak out and produce crazy amounts of more oil and cause even more redness and swelling just so it can get back to that 'happy' place. Just think balance with your skin and if you use this toothpaste trick remember your moisturiser, even if your skin is crazy oily!
Again, some people this may not work with as not everyone's skin can be directly thrown into a category and be expected to be the exact same as everyone else's, but for most of you this will.
For people with dry skin, toothpaste (as mentioned quite a lot in these reviews) is not recommended :-( but try products specifically aimed at dry skin. The best one I've ever used for myself (might just work for you) when I get dry skin in the winter is Garnier goodbye dry! milk cream cleanser.
I realise this review isn't quite as directed at toothpaste but hopefully it helps people :-)
Another tip for washing your face regards your skin type is to pay attention to the type of cleanser you're using.
For example- with oily skins, using foams or gels will aid and you'll be fine to use them because they dry out more than others. But for dry skins, using milk cleansers and creams will aid better as they produce more moisture and give your skin the ability to hold more moisture, provided you find the right one for you.
Hope this helps.