After 30 years of research by experts 1. Recommended for hair growth in small areas (buy 3 get 2 free) 5 treatments. 2. Recommended for hair growth in medium areas (Buy 5 get 5 free) 10 treatments to improve the scalp environment.3. For large areas of hair growth, we highly recommend 22 treatments (buy 10 get 12 free) to promote healthy hair growth.
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