What is the best shampoo and hairspray if you have Telogen Effluvium hair loss?

The type of hairspray/shampoo will not increase hair loss with TE. I suggest seeing a hair loss expert now to evaluate and go over your condition and provide you information about your best treatment options and hair care. There are great non-invasive options like prp/progesterone and/or hair transplantation. See an expert. Best, Dr. Emer

I would recommend working with a Hair specialist to adequately work up the underlying cause. This will require relavent blood work, diet analysis, and other lifestyle assessments to identify and treat the cause.

If you truly have telogen effluvium, the shampoo and hairspray do not matter. The problem is deep down in the hair follicle growth centre. The things you indicated affect the surface of the hair and scalp and matter little.