How should I use this shampoo for best results, and are there any precautions?

To use THE DOCTOR Shampoo, apply a small amount to wet hair, gently massage into the scalp and lengths, then rinse thoroughly. The large 946 ml bottle is practical for regular use, making it suitable for those who wash their hair frequently. For best results, focus on the roots if your scalp is oily, and distribute the lather through the ends to condition them. Because the formula contains panthenol and apple cider vinegar, it can help hair look smoother and shinier after cleansing. However, if your scalp is very sensitive, or your hair is highly bleached, dry, or reactive to fragranced products, pay close attention to how your hair and skin respond. If irritation occurs, discontinue use and alternate with a gentler shampoo if needed. Avoid contact with eyes. Store the product in a cool, dry place and consult a specialist before use if you have chronic scalp conditions, are pregnant, breastfeeding, or taking medication.