The focus supplements duval and dune are used by some athletes to help their focus, while others have no real effect.
As with most supplements, there are few well-designed studies to help us know which one is right for you.
But what’s the difference between a duval concentrate and a dune concentrate?
Focus supplements duvis have been around for decades, while dune concentrates have been developed in recent years, and are often cheaper.
Find out which is best for you with our article on the pros and cons of each.
Focus supplements: The most common focus supplements The most commonly available focus supplements are duval, dune, and other dune powders.
These powders contain either no concentrated extract or extracts.
They are available over the counter, as tablets or capsules.
These products are typically more expensive than supplements that contain concentrate.
These supplements are typically cheaper than supplements containing concentrated extract.
There are three main types of focus supplements: Duval concentrate: The best concentration of the three concentrate types.