We know—it all sounds too good to be true. The conditioner-only rule isn’t the only thing that makes a difference from a regular washday with shampoo.Co-washing also requires rubbing. Surfactants and detergent compounds such as sodium lauryl sulfate are not used in co-washes, so it depends on how well you scrub your roots and scalp to remove dirt, oil, and buildup from your hair. is not as effective as shampoo, so you may feel some buildup.
Other drawbacks of conditioner-only washes include itchy scalp and the risk of causing or exacerbating contact dermatitis. It can be caused by inflammation of the scalp. To help with these, Prose recommends washing your hair with a clear shampoo once a week or once every other week. If so, regular co-washing is probably not appropriate. Constant use of conditioner can make your strands weigh less (according to Mecca).
Simultaneous washing is a great way to maintain hair length and add much-needed moisture and softness to your hair. However, this method can come with potential drawbacks, so you may want to consider adding shampoo from time to time.