This company, also known as Multivitamin Discount Mega Store, is located in Staten Island, NY. This is according to the BBB; their address is not listed on their webpage. They have an email address, but it's questionable as to whether anyone at the business ever opens it. The three emails I sent them were never answered or even acknowledged.
My warning is simple. If there is any issue at all with an order you place with this company, I think it very unlikely to be resolved to your satisfaction. But, please don't take my word for it--you don't know me; I may just be a bitter old curmudgeon. Check out the BBB report on this company. How bad does a company have to be to earn an F rating?
There are a lot of good online discount vitamin & supplement businesses that will bend over backward to make you happy. This company, discountmultivitamins.com is certainly not one of them.