Jane,
¿Cómo está?
Probably spend some time to make the store feel trustworthy. This is because you are selling vitamins and supplements where people actually put these things into their mouth. Your store needs to build up a very high level of trust within the first few seconds when the customer comes to your store.
An excellent design can make a huge difference.
But small things like putting up a contact page is also very important. Customers expect that they should be able to find you in all sort of circumstances. You want to put down your email, phone, office location on your store. It adds another level of trust.
I have experience setting up a store to sell health and beauty products. You can drop me an email and possibly we can exchange some ideas.
My email: support@inscoder.com
Regards,
Billy Yeung