Promotional Material for Hair Loss Supplement for Salons

Information for the business: Hair Loss
Industry: Business
Design details: There is lots of promotional material available for this product online already so this can be the starting point.
Target audience: Hair Salons and their Clients
Content on the front/back side and body: Illustration, actual product.
Ideas for the visual style: Male, high impact,
Extra notes: I am shortly starting a field sale campaigns to hair salons to sell them a hair loss vitamin.

I want to supply some promotional material with the products both to promote the sale of the vitamin to the salons and also to supply to customers who ultimately purchase the product online (or decide to not purchase but would like additional information).

I am open minded to ideas on what the type of promotional material might be so please send me your ideas particularly if you have experience with this type of sales campaign. At the moment I am thinking postcards / flyers.

What I think is crucial now for salons is that I communicate clearly why the product is unique, a real opportunity for them to sell and the profit margins that they can achieve by selling it in multi quantities (single sales and bundles)

For the ultimate customer, I think including existing customer reviews will be effective as well as the key selling points for the product.

There is lots of promotional material available for this product online which could be easily recreated into a postcard or flyer so what is crucial for this I feel is the thinking behind what type of promotional material will work best and the communication that goes into it.