I recommend Ryeo Root Essence.

This is Ryeo Jayang Yunmo Hair Loss Symptom Care Root Nourishing Essence. It is a product I make sure to apply regularly to soothe my scalp irritated by strong sunlight. You simply apply it to your scalp after shampooing and massage it in. It is easy to use as there is no need to rinse it off. I heard it helps alleviate hair loss symptoms, so I plan to use it consistently.