What are the supplements used for/what do they treat? October 28, 2021 14:07 Updated Follow The supplements Cove offers—magnesium, riboflavin, and CoQ10—are all preventative migraine treatments. In other words, they help stop migraine headaches before they happen. How? We explain everything right here. Related articles What supplements do you offer? Do I need a prescription for the supplements? How does Cove work? How do I cancel my Cove subscription?