Rydad, you have to customize or adjust the strength, dose and frequency on the website. The default is either v500, 1 tab a day, 30 day supply or 1gram, 1 tab a day for 30 days . You can adjust all three to show 1gram, 4 tabs a day, and either 30,60, or 90 day. When you do, the discounted prime membership price appears on the upper right side of screen. It’s reduced by 40%. Hope this helps.