Updated: Aug 17, 2020
German independent Test Foundation 'Stiftung Warentest' has tested several liquid and solid shampoos. The surprising winner is a shampoo from the Discount Retail Chain Lidl.
Solid shampoos score good in the ecological balance and can also travel in hand luggage. However, if you pay attention to the price, the liquid products are unbeatable. But how do they wash in comparison?
'Stiftung Warentest' compared eight liquid shampoos with four hair soaps and six shampoo pieces in some aspects such as care and use, and came to a positive result. All liquid and six solid products received the overall rating "good".
In comparison, the Lidl Private Label brand 'Cien Day by Day Fruit / Vitamin Shampoo Power & Volume Normal Hair', which emerged as the test winner, was particularly convincing. In addition to the positive results for hairwashing, the discounters' shampoo also scores top with a price of US $ 0.86 in terms of price-performance ratio.
Poor hair soap care
During the care, the testers looked at how well the hair can be combed after washing, whether it is shiny, smooth and voluminous. Liquid and solid shampoos perform consistently well here. The situation is different with hair soaps. Solid shampoos and hair soap look similar at first glance, but the latter is saponified with lye.
Solid shampoos convince in the test
'Stiftung Warentest' also assessed the life cycle. Here the solid shampoo always beats the liquid. The production uses less energy, the solid shampoo also has no preservatives and is often mixed with less fragrances and dyes. The solid shampoo is also usually packed in paper or recycled cardboard, as liquid shampoos are usually filled in plastic bottles. Another plus point is that solid shampoo is overdosed less than is the case of liquid shampoo.