Peanut Butter Supreme Quest Bar Review (New Corn Fiber Type)

All Quest Bars are made of high quality protein and have plenty of fiber, but these days that’s not enough. Food tech has advanced to the point that a nutrition bar must also be delicious to be called the best. So in this review I’ll let you know how the Peanut Butter Supreme Quest Bar tastes, and what difference the new fiber type has made.

Peanut Butter Supreme Quest Bar


The official description from Quest’s website:

“This is where it all started! you’ll go nuts for the amazing peanut butter taste in one of our very first Quest Bars. With 20g of protein and 5g net carbs, the only thing missing is the ballpark.”

It’s an uncoated, lemon-flavored protein bar. This is what it looks like:

Peanut Butter Supreme Quest Bar, no wrapper

Taste & Texture

It’s sweet with a good strength of peanut flavor, and softly chewy. The consistency is nicely varied with peanut bits.

This is a really nice Quest Bar, but I have to say I normally opt for the chocolate chip varieties over it. That’s because it’s one of the slightly higher calorie offerings Quest do, and it seems like a better taste-investment (so to speak) to have chocolate included. Funny, because it’s only a matter of about 20 Calories, but there you go.

As with all Quest Bars it’s great as it is, but it’s even more rich and dessert-like heated about 10 seconds in a microwave or baked a few minutes (which is even better because the outside goes crispy).

Corn Fiber Recipe Update

Quest Nutrition built their reputation with IMO (isomaltooligosaccharide) fiber as a main ingredient in their bars. They’ve since removed IMO from their line up entirely and now use corn fiber instead, claiming it makes a softer, longer-lasting product.

The IMO version could get quite tough towards the end of the use-by date. The updated Peanut Butter Supreme Quest Bar I had was noticeably softer, and the new fiber type seems to be a big improvement texture-wise.


Serving size: 60 g
Calories: 200
Fat: 10 g
Net carbohydrate: 5 g (2 g sugar)
Fiber: 14 g
Protein: 20 g

(Weights of Quest Bars can vary quite a bit, leading to significantly different caloric content than stated on the label. I did a write-up here.)

Peanut Butter Supreme Quest Bar Rating: 8/10

This is a good flavor. As mentioned, I normally go for the chocolate chip varieties over this one, but I like this for a change on occasion.

Cheapest Places to Buy

Supplement shops are very expensive comparatively, so I always buy online.

I find Amazon consistently has the cheapest price now. If you’re in the UK you can buy at (£19.74 for box of 12 at time of writing).

If you’re in America, you’re lucky—they cost way less for you guys. You can buy at Quest’s website ($24.99 for box of 12 at time of writing).

Actually, even if you’re in the UK you could do worse than ordering off the Quest website above. Their shipping is cheap and fast, and the price works out about the same, funnily enough. Cheaper if it goes straight through customs tax-free, which sometimes happens.

Thanks so much for reading. If you found this useful, I have reviews of all Quest Bars here.

All feedback and questions welcome, I’d love to hear from you—just use the comments box below or send me an email.

If you like what I do here, you can support my work by buying through the affiliate links on this page (it doesn’t cost any more for you). Cheers!

Stay Up To Date