Re: What\'s the difference...
I don't know about it being "stronger"... Maybe that idea comes from the fact that it is 100% protein, ie with no moisture. But because of that, it can be damaging if used incorrectly...like not followed by deep conditioning with a moisturizing conditioner.
And I did find a reference for my earlier statement, although it wasn't the one I originally read. For those who don't want to comb through all the info to get to the relevant part, here you go:
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The two types of treatments are:
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Reconstructors, which make the hair stronger and are generally protein-based. These are for you if you have chemically damaged hair (i.e. from a perm or colour) or breaking or weak hair.
They are often a combination of protein and moisture, as pure protein treatments used incorrectly can leave the hair brittle. After using this type of treatment don't expect your hair to feel great as they work internally and you may still need a conditioner to make your hair feel smooth. They are most often found at the salon and used during chemical processes. Don't use protein-based treatments within a week either side of a colour as they can cause colour to fade or not 'take' properly in some instances.
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Moisturisers, the most common type of treatment, balance the moisture content of the cortex (middle of your hair). Great for frizzy, dry hair and those of you with curly hair that lacks bounce. Will treat all damage conditions from chemical to physical (i.e. from colouring to over-drying or heating your hair to sun damage).
As with most products, treatments should be applied using the instructions on the pack or by your professional hairdresser. The amount needed also varies greatly depending on the product and how much hair you have. Do not leave treatments in your hair for longer than instructed, especially if using a protein-based treatment as these will have no extra effect, and may even make your hair brittle.
If your hair is in really bad shape a twice a week treatment may be needed, but generally for fair to poor conditioned hair once a week is recommended. For general maintenance go to once a fortnight or once a month. Remember your hair can only take in so much extra nourishment: over-doing it on the treatment side means you are wasting your money as it is simply rinsing down the drain!
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Source: http://cleo.ninemsn.com.au/cleo/hair/hairschool/default.asp
