I am beginning to find hair conditioner depressing. The quest for one that does no evil is proving extremely challenging and I've had two crushing disappointments in the last 24 hours. The first was Jonathan Anti-Aging Restorative Conditioner. This is packed full of so many good things that I almost bought it: several minerals with charged ions; at least 16 plant extracts - including recent discovery (for me), argan; several proteins and shea butter.

The problem is that there are also too many nasty things to turned a blind eye to. One of which is methylchloroisothiazolinone, a skin and membrane irritant that can only be used in restricted concentrations in rinse-off products. There is also methylisothiazolinone, which was found to be a neurotoxin in a test on rats, an irritant called benhetrimonium chloride and another called butylphenyl methylpropional.

The other conditioner to disappoint was Aesop's. Not only did it do very little for my hair (I was feeling a little desperate, so tried it despite all warning signs), the third most dominant ingredient is stearalkonium chloride, which is actually a fabric conditioner and is toxic and unsafe.