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Soapnuts
From TipThePlanet
Soapnut shells contain saponin (a natural detergent) and when they come in contact with water they make mild suds. Soapnuts are a natural, organic, environmentally friendly alternative to soap, detergent and shampoo. Soapnuts (Sapindus Trifoliatus) are grown in India and Nepal, harvested sustainably in October from 15m high trees. The soapnuts are sticky and golden in colour when removed changing to reddish brown when dried.