Is this serum suitable for coloured, bleached or heat-styled hair? — The Doctor. Hair Serum with Panthenol and Apple Vinegar Reconstruction, 89 ml

Yes. The product is aimed at hair that feels stressed by a hair dryer or straightener, or by bleach and colour services. Those processes can dry out the fibre and make the cuticle feel rough, which often shows up as dullness, frizz and reduced shine. The panthenol in this serum helps the hair and scalp retain moisture, while the apple vinegar helps the hair surface lie flatter, making strands feel less coarse and appear more reflective. That makes it a useful step to include after washing, especially if you regularly use heat tools or have recently had your hair coloured. There is one important limitation: the product information does not describe this serum as a heat protectant. If you blow-dry or use straighteners on high heat, keep using a dedicated heat-protection product and treat this serum as a separate moisture and smoothing layer. Apply it on damp hair before your usual heat protectant or styling product, or follow the order that suits your existing routine. Also, if you have just had a chemical treatment or your scalp feels sensitive, irritated or broken, do a small patch test on one area before applying the serum over the whole scalp, and stop use if irritation appears.