One Bars Review

One Bar

Definitely Not the One (Avoid this Low-Carb Protein Bar)

Right when I thought things couldn’t get any worse, I came across One Bars, the worst low-carb bars availabe. Fittingly for it’s name, the One Bars gets just a single star.

One look at the inside of this bar and you can immediately tell this is not going to be good for you. Popular flavors include Glazed Donut and Birthday Cake. Who eats these things?!

They contain isomolto-olligosacharides (ISO), the fake and misleading fiber that Quest Bars got sued over. One of the many problems with ISO is that it’s partially digestible, increasing net carbs. One Bars also contain Carnauba Wax, which is what I use to polish my car (no, really).

I included them here because, despite their inferiority, they’re selling well on Amazon and anyone in the market for a keto-friendly protein bar could come across them.

Sadly, taste and price alone are enough to earn bars high ratings on Amazon. The problem is that the people these bars are being marketed to are trying to be healthy. Beware, keto friends: these could be the unhealthiest bars money can buy.

Macros: 20g protein, 7g fat, 9g fiber, 8g net carbs



  • None


  • Contains isomolto-olligosacharides
  • 8 net carbs (sugar alcohols increase true carb count)
  • Maltitol and sucralose
  • Palm kernel oil
  • Inadequate fat for keto
  • Artificial everything


What are One Bars’ available flavors?

One Bars come in the following flavors:

  • Birthday Cake
  • Almond Bliss
  • Maple Glazed Donut
  • Peanut Butter Pie
  • Blueberry Cobbler
  • Peanut Butter
  • Peanut Butter Chocolate Cake

What ingredients are in One Bars?

One Bar Ingredients include: protein blend (whey protein isolate, milk protein isolate), isomalto-oligosaccharides (prebiotic fiber from vegetable source), vegetable glycerin, maltitol, palm kernel oil, sunflower seed butter, natural flavors, nonfat dry milk, soy lecithin (an emulsifier), sea salt, tapioca starch, calcium carbonate, colored with beta carotene, distilled monoglycerides and sucralose.

Are One Bars keto?

Not really. They’re low carb but not high in fat, and they’re loaded with unhealthy ingredients so they’re not really good for any human. See our review of the best keto friendly protein bars for 2019.

Where can I buy One Bars?

You can buy One Bars on their website or on on Amazon. You may also see them at CVS, Safeway, Trader Joe’s and 7 Eleven. 


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