michael adams wrote:
wrote in message
oups.com...

michael adams wrote:
Well Rupe, if you like throwing your money away on the likes of
Timotei, Swarfega, and Muc off Bike cleaner, then that's your
privilege I suppose.

mostly I use hand soap, shower gel and shampooo intercghangeably as you
suggest. In that case I just want something to wash away grease.

Shampoos, in principle, though do have extra ingredients to make your
hair shiny (conditioned?). This is not an issue for me or my grey
beard but there is a whole pile of odd lipids (e.g. lecithin, ceramide
and related things) that are related to making your hair look nice as
well as degreased. Ironically, I think the shiny look from nice
freshly washed hair and fancy shampoo is from lipid that has been put
back on but in a way that looks nicer than beofre it was washed.
Something like tyhat anyway. As you say though, it is mainly
irrelevant.

...

I stand to be corrected, but as I understand it, the main determinant
of hair condition - which presumably includes shiny hair, is diet
What's ingested rather than whats applied externally. Cat and dog
foods have added oils to promote a glossy coat. Although AFAIAA, as
yet no human food is being promoted on that basis.

For people who wash their hair every day there is a pile of extra
ingredients in shampoo that you do not find in washing up liquid that
are put there to make your hair look nice.
Check out a bottle; you get an incredible cocktail. Some of it is for
smell and some for colour and there are several detergents and then a
pile of things to make your hair shiny.
Washing up liquid is relatively simple in comparison. For me and for
many people it would be just as effective (and I have used it in
emergencies) but shampoo is a real stew of funny lipids.