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Amazon

Optimum Nutrition's protein powder has been a bestseller on Amazon for a long time -- even at full price. Now that Amazon is offering $25 to shoppers who spend $100 on eligible Optimum Nutrition protein powders, shakes and more, it's the perfect time to stock up. 

The limited-time offer will automatically be applied at checkout once you meet the $100 minimum of eligible items and you'll receive the $25 in the form of an Amazon credit to spend anywhere on the site (including on more Optimum Nutrition protein powder). There's no word on how long this deal will last, though, so we recommend hurrying to get your order placed before it disappears. 

Keep reading to find out which of the brand's popular items are eligible for the deal or tap the button below to shop all eligible Optimum Nutrition items now.

Shop eligible ON protein powders on Amazon

Get $25 when you spend $100 on Optimum Nutrition protein powder on Amazon

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Amazon

Our readers (and our editor) are big fans of Optimum Nutrition's Gold Standard 100% Whey protein powder. So are Amazon shoppers. So we had to make sure we spread the word about this deal. For a limited time, shoppers who spend $100 on eligible Optimum Nutrition items, including the best-selling 100% whey protein powder, will receive a $25 Amazon credit to spend on whatever they like.

The aptly named Gold Standard protein powder has earned a 4.7-star average rating after more than 204,000 reviews. It's popularity is no mystery. The pure whey powder mixes well. It tastes great and it packs 24 grams of protein into every serving. Each serving also includes over five grams of branched-chain amino acids (BCAAs), the amino acids that support muscle growth and metabolism.

That formula makes it a great protein powder for before or after a workout, as it's made to help prevent muscle breakdown and stimulate new muscle growth at the same time.

Available in 23 different flavors, this protein powder wins on taste just as much as it does on ingredients. From tried and true staples like vanilla and chocolate to fun and creative new flavors like fruity cereal, you're bound to find a taste you'll love. With so much variety, you'll also be able to switch things up whenever you get bored of your old go-to.

Right now, 15 of those flavors are eligible for the limited time offer available on Amazon so stock up on your favorite flavor or pick up a couple of new ones to try.

Here are the eligible flavors that will count toward the $100 purchase minimum needed to get your $25 Amazon credit:

$81 and up at Amazon