Did you know View All 3 Mar 5 Benefits of Alpha Lipoic Acid to Manage Diabetes Events Synergen has proudly participated in prestigious events to resounding success. Here are a few glimpses of team Synergen at these events. Event Name 1 Event Name 2 Videos Frequently Asked Questions Pills Packs & Rental Program Any time your prescription ends or in case you need a consultation: The recommended dietary allowance for vitamin D is 15mgs or 600 international units Trusted Source per day for adults.