what about this:
https://www.amazon.co.uk/Faith-Nature-Tree-Shampoo-400ml/dp/B000NHKWJO/ref=sr_1_16?dchild=1&keywords=dreadlock%2Bshampoo&qid=1619631150&sr=8-16&th=1
the reviews seem good for dreadheads, no parabens and seems kinda natural
ingredients: Aqua, Ammonium laureth sulfate (sounds bad but made from coconuts), Maris sal, Melaleuca alternifolia leaf oil, Citrus limon peel oil, Citrus aurantifolia oil, Citrus aurantium dulcis peel oil, Polysorbate 20, Potassium sorbate, Sodium benzoate, Citric acid, Limonene.
it makes it lather, irritates the skin, and the process of deriving contaminates it with carcinogenic chemicals
als might be better but most avoid all sulphate
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My new book Ban The Taboo Vol 1