Sons Hair Growth Shampoo For Men. DHT Blocker. Thickening Formula Promotes Strong & Thick Regrowth. Contains Saw Palmetto, Argan Oil, Caffeine, & Rosemary. 3 Month Supply. Made in Europe.WHAT IS SONS SHAMPOO? Sons Shampoo fights hair loss with saw palmetto, which blocks DHT uptake causing shrinking follicles. It also has caffeine and glycerine to stimulate growth and support a healthy scalp. HOW DO I USE IT? Massage into scalp for 30 60 seconds, leave for 60 90 seconds, then rinse with warm water to avoid dryness. WHY CHOOSE SONS SHAMPOO? Trusted by 300,000+, Sons holds the UK license for the only two clinically proven hair loss