Any fantastic hair product recommendations?

For shine I apply one tiny single drop of argan oil once a week. But this only works when my hair has colour. The white- my natural colour (see photo) - doesn't really lend itself to shine. Due for a top up of darker highlights in a few days.

I have long silver hair which is always worn up in a messy bun.

I have recently gone on to Thick and Full Biotin and collagen shampoo. I buy it in Tesco and I also buy their conditioner. They are roundish purple containers with gold lids. It makes my hair noticeably thicker. After towel drying I use Avon Miracle Densifier for “a fuller and thicker look”. Its a sort of serum and you only need a few drops.

My grey hair has lost its shine too. My hairdresser, who happens to be my cousin, says its because most of us don't rinse our hair thoroughly enough and don't take care to gently comb and brush the hair along the length to smooth the cuticle, and she does achieve a better shine than I do.
It doesn't seem to work for me though, so I hope someone comes up with a product that gives us shine the easy way.
A shiny head of grey hair can look so lovely.

I have shoulder length greying dark wavy hair. I have tried most of the Frizz-ease range as well as various 'muck' and 'custard' type products. The one I keep returning to is Mixed Chicks leave-in conditioner, bought from Ebay. I have a salon-sized pump dispenser and it has lasted for years, as a pea sized amount after washing and towel-drying every 2 days is all I need. I comb through, allow the hair to dry naturally, then comb again.
Mixed Chicks Leave in

Not a very good picture.

I started taking vitamin B and D supplements about 3 years ago in the hope that it would strengthen my nails. My nails are still thin and break so easily but my hair is thick and curly and healthy and I have practically no hair loss. Will try and post a picture.

My hair is pretty long and is permed into curls once a year.

I love Kinky Muk Curl Amplifier

Not sure about shine as my hair is still quite shiny.

I put a little on my damp hands (like hand cream) and run through my hair and scrunch up the curls.

This holds for ages, takes about one minute and can be damped and re-scrunched again later if required (say in the evening)..

www.mukme.com/products/kinky-muk-curl-amplifier

It is the only product I use - as I'm lazy with hair!

You are lucky. My hair is dark (greying ofcourse) and straight, in a bob. There are lots of grans with your hair-type and will be coming along soon.