While shampoos can't drastically increase hair growth, using a shampoo that contains ingredients like biotin, keratin, or caffeine might help promote healthier hair and create a better environment for growth. Remember, maintaining a balanced diet, managing stress, and taking proper care of your scalp are also important factors in promoting hair health and growth. If you're concerned about hair loss or slow growth, it's a good idea to consult a healthcare professional or dermatologist for personalized advice.

There's no shampoo that can significantly speed up hair growth. Hair growth is primarily influenced by genetics, diet, and overall health. Using a healthy, nourishing shampoo can support the health of your hair, but it won't drastically increase its growth rate.