M.S.
Dear J.:
Did she say it was a PRODUCT called Infussions? Because infussions are usually just herbal teas that you rinse through your hair and scalp to reduce itchiness that can lead to hair loss. There are many types you can make: chamomile, licorice, nettle, etc.
There is a product called Infusiom 23 which is a leave-in rinse but, though I used it for years (and it's available in most stores), I don't believe it has any effect on hair loss. I've always had thin hair...both when I used this product and when I didn't.
I believe the best thing for the hair is to improve the diet with organic, whole foods and good fats (unheated olive oil, avocado, nuts, etc.)
Best wishes, J.!
M.