To start, here’s what you don’t want in your shampoo. These four ingredients have a bad reputation.
1. Sodium Lauryl Sulphate. Also known as SLS or generalised as sulfates, this is often added to shampoos to increase the amount of lather when washing to give the scalp and hair that squeaky clean feeling. But excessive and prolonged use is linked to increased scalp irritation, shared Dr Chong. Instead, he advised to look for a shampoo with an amino acid surfactant, which is gentler on the scalp and hair.
2. Parabens. Used as preservatives in the formulation, it has been known to trigger scalp sensitivity in those who might be prone, shared Dr Chong. Common parabens to stay clear of include methylparaben, ethylparaben, propylparaben, isopropylparaben, butylparaben and isobutylparaben.
3. Diethyl Alcohol/Ethanol/Alcohol. According to Dr Chong, this ingredient is added as an emulsifier to mix the water soluble and fat-soluble ingredients in the shampoo. However, the downside is that when used excessively, it can cause scalp dehydration, which in turn, can result in increased irritation, itching and flaking.
4. Dimethicone. A man-made silicone molecule that leaves locks shinier, smoother and tangle-free. However, it can weigh down curly locks and fine hair. Instead, Dr Chong advised choosing a formulation with dimethiconol, a silicone-based liquid polymer that has a lighter texture.