L’Oréal Density Advanced Shampoo can help strengthen hair, reduce breakage, and improve the appearance of thickness, but it does not reliably regrow lost hair. Its effectiveness is best when combined with a healthy hair-care routine, and factors such as your diet, lifestyle, environmental exposure, and overall health also play significant roles in hair fall and hair growth. For persistent or significant hair loss, it is best to consult a dermatologist or trichologist, who can recommend the most suitable shampoo and additional treatments tailored to your condition.