Baby shampoo's gentle formula makes it suitable for delicate skin and hair. However, the timing of its use depends on the context.
For Infants:
You can begin using unperfumed baby bath products, including shampoos, around 4 to 6 weeks of age. Before this, plain water is sufficient. For babies with longer hair, a small amount of mild baby shampoo can be used, lathering gently and rinsing thoroughly. Remember to use only a small amount to avoid irritating the baby's sensitive skin. Some parents choose to wait longer, even up to two weeks, before introducing any bath products.
For Adults:
Baby shampoo can be used by adults. Its mild formulation is beneficial for those with sensitive scalps or conditions like eczema. Although it might not leave hair as shiny as some adult shampoos, it's effective at cleansing and gentle enough for daily use. One clinically recommended brand for adults is Cetaphil, known for its calendula extracts which hydrate dry hair.
For Other Uses:
Baby shampoo has non-cosmetic uses: some divers utilize it to defog their diving masks. The method involves diluting the shampoo or applying it full strength, followed by rinsing.
In short: Baby shampoo is appropriate for infants from approximately 4-6 weeks old, using only a small amount. Adults can also use it safely, particularly those with sensitive scalps, and it has other niche applications outside of typical hair washing.