Can I use this 500 ml bath soap on both my hair and my body?

Yes. This product is described as a multi-purpose bath and shower cleanser for both skin and hair, so you can use it as a body wash and as a shampoo in the same routine. It is a liquid soap rather than a solid bar, and the 500 ml format is meant for regular use at home, after sport, or in a warm bath or sauna.

For the body, apply to damp skin, work into a lather, and rinse. For hair, wet the hair thoroughly, use a small amount, massage the scalp, and rinse well. Because it is a soap-based cleanser, it can give a deeper, more herbal wash than a typical shower gel. If your hair tends to tangle or feel dry after washing, follow with a conditioner or a light oil on the lengths. Some people use it only as a body wash and keep their usual shampoo for the hair; that is also fine.

If your skin or scalp is sensitive, reactive, or easily dried out, pay attention to how it feels after the first use, especially when you use it as a shampoo. Avoid contact with eyes, and rinse thoroughly if any product gets into them.