The category’s own name, on a .com.
A great domain does quiet work every day: it is found, remembered and trusted. WheyProtein.com does all three by simply being what it says.

It matches what people type
Shoppers don’t search for clever brand names; they search for the thing they want. “Whey protein” is that thing. An exact-match .com lines your brand up with the words customers already use.
It signals leadership
Owning the generic name of a product tells customers, partners and investors that you are the reference point. It is the kind of name a category leader has.
It is effortless to remember
Two everyday words, spelled the way they sound, with no hyphens or numbers. That makes it easy to share by voice, print on packaging and recall at the moment of purchase.
It carries .com trust
The .com is the extension people type by default. An exact-match .com for a well-known product is a scarce asset: there is only one, and it is available now.
WheyProtein.com
$1,500,000
Buy it now, or make an offer at no cost. Every sale runs through Names.com with an escrow-secured transfer.