Comfrey is among the oldest of herbal remedies, dating back to ancient Greece and has a long history of use.
Allatonin also has anti-dandruff properties - add a couple of drops of the tincture to your usual shampoo.
100ml 1:5 Alcohol Volume 25%. Take 10 - 15 drops 2 x daily.
See what Wikipedia says:
Comfrey Liquid Extract Tincture - Symphytum officinale 100ml
- Brand: The Happy Health Company
- Product Code: 5055677803428
- Reward Points: 13
- Availability: In Stock
- Ex Tax: £6.66
- Price in reward points: 799