Megatek. P&S - the oil is great for protection of the hair in winter from mud damage - bog burn, and along with the sulphur for preventing unwanted visitors and healthy skin, but Megatek really promotes growth and strength of the hair.
I use it on my traditional to keep his hair in tip top condition and fast growth, and having finished chemo two weeks ago have started using it on my bald head - it was originally developed for chemo patients.
I am now one week in and have 1/2 cm of fluff from a totally bald scalp - sad me has just pulled out a hair and measured it
If you have a rub or bald spot, use it neat, for general growth promotion and hair strength mix 50 - 50 with water and apply two or three times a week and leave in.