Fiber One
Chocolate Chip
TL:DR
In 2 Sentences
Very few bars hit 10g of protein at just 90 calories with only 1g of sugar. Fiber One gets there with a blend of milk and soy proteins plus chicory root fiber and low-calorie sweeteners for a chocolate-chip bite that stays light.
When to choose Fiber One Chocolate Chip
Choose it when you want a small, chocolatey bridge between meals or a late‑afternoon sweet that still brings 10g of protein. Skip it if you’re sensitive to sugar alcohols or prefer short, whole‑food ingredient lists.
What's in the Fiber One bar?
Fiber One’s Chocolate Chip Protein Bar reads like a mini engineering project: a light, 90‑calorie snack built on a blended protein base (whey and casein from milk plus soy, with a touch of collagen), sweetened mostly without sugar, and finished with real chocolate chip flavor from cocoa, Dutch cocoa, and semisweet chocolate chips.
The macros are intentionally modest—snack-level protein, very low fat and carbs—achieved by leaning on chicory root fiber and modern sweeteners rather than oats or dates.
If you want a breezy, chocolatey bite that won’t crowd your calorie budget, this bar sets the stage; the tradeoff is a more “formulated” ingredient list than a whole‑food nut bar.
- Protein
- 10 g
- Fat
- 3 g
- Carbohydrates
- 10 g
- Sugar
- 1 g
- Calories
- 90
Protein
1015LOWProtein comes from a blend: soy protein isolate plus milk proteins (whey isolate and concentrate, and calcium caseinate), with a little collagen. Dairy and soy are complete proteins, while collagen is not, so the mix still covers essential amino acids; whey digests quickly and casein more slowly. At 10g, the dose is on the lighter side for protein bars—more of a tidy boost than a full post‑workout hit.
Fat
39LOWFat stays very low and comes mainly from palm and palm kernel oils (more saturated), canola oil (mostly unsaturated), and cocoa butter in the chocolate chips. The tiny 2.5g total means little richness or satiety from fats; it also means the bar relies less on calorie-dense oils. If you prefer bars that get their fats from nuts or olive oil, this one skews more toward refined, functional oils used sparingly.
Carbs
1020LOWMost carbs are engineered rather than from grains: chicory root extract (a soluble, prebiotic fiber) provides bulk, while allulose, maltitol (a sugar alcohol), and glycerin supply sweetness and softness with fewer digestible carbs than sugar. This combo tends to be gentler on blood sugar than cane sugar, though maltitol can still nudge glucose a bit and, along with chicory fiber, may unsettle sensitive stomachs. Net effect: low, steadier energy rather than a quick carb surge.
Sugar
14LOWOnly 1g of sugar, mostly from the semisweet chocolate chips; the sweetness instead leans on allulose (a low‑calorie “rare” sugar), maltitol syrup (a sugar alcohol), glycerin (a plant‑based syrup), and a touch of stevia. That keeps sugars low and blood sugar impact modest, though maltitol isn’t carb‑free and can bother sensitive guts at higher intakes. If you tolerate polyols well, you get chocolatey sweetness without much actual sugar.
Calories
90210LOWAt just 90 calories, this is one of the lightest bars on the shelf. Most of those calories come from the 10g of protein, with small contributions from minimal fat and low‑calorie sweeteners instead of sugar. Think “bridge snack” rather than meal replacement—handy when you need something small and sweet with a bit of protein.
Vitamins & Minerals
No standout vitamins or minerals here—nothing hits 10 percent of daily value. You do get a small bump of iron (likely from cocoa) and a little calcium (from milk proteins), but this bar is designed for protein and fiber sweetness, not micronutrients.
Additives
Expect a modern toolkit: soy lecithin to keep chocolate smooth, glycerin to hold moisture, natural and artificial flavors for consistency, and refined sweeteners (allulose, maltitol, stevia) to cut sugar. These ingredients are highly processed but purposeful—texture, shelf life, and sweetness with fewer sugars. If you prefer short, whole‑food labels, this one will read more “lab‑built” than “kitchen‑made.”
Ingredient List
Chicory roots
Defatted soybean flakes
Cow's milk whey
Oil palm fruit
Vegetable oils (palm, soy)
Cow's milk whey
Corn or beet fructose syrups
Corn or wheat starch
Sugarcane and sugar beet
Cacao beans
What are people saying?
Sources
Range
“I finally found the perfect bar! The Protein zone (a Fiber One brand) has a protein bar line with 10g of protein for only 90 cal!”
“I like the protein one bars, they're made by fiber one, but unlike the fiber one bars, protein is the focus, so very good protein/calorie ratio.”
“If you haven’t tried it, they have “protein one” bars that are 90 cals and 10g protein. they’re the best I’ve found for low cal and decent protein!”
Main Praise
Fans love the efficiency: a 90‑calorie bar that delivers 10g of protein without feeling heavy. On Reddit, it’s repeatedly praised as a go-to for calorie‑conscious snackers who still want meaningful protein, and that theme shows up across threads from 2020 to now.
Amazon’s strong average rating suggests the flavor lands for most people—reviewers call it chocolatey, chewy, even a little crunchy, and appreciate that it doesn’t come off gritty or overly “protein‑bar” in taste.
Many say it’s perfect as a deterrent to raiding the pantry at 9 p. m.
—just enough sweetness to satisfy, with a tidy protein bump. The portion control is part of the appeal: dessert vibes without the calorie spiral.
Main Criticism
Critics come for three things: tummy troubles, texture, and expectations. Maltitol (a sugar alcohol) and chicory root fiber can bother sensitive stomachs—one Redditor joked to stay near a bathroom—and that’s a fair flag if polyols don’t agree with you.
Texture is divisive: some find it pleasantly chewy; others call it tough or hard, especially in cooler temps. A few detractors don’t love the flavor, describing it as “the impression of chocolate” rather than the real deal.
And separate from taste, some shoppers grumble about price creep and, occasionally, packaging expectations versus the actual coating.
The Middle Ground
The split makes sense when you look under the hood.
This bar gets its numbers by design: a protein blend (soy plus milk proteins) for 10g of protein, chicory root extract for prebiotic fiber bulk, and low‑calorie sweeteners like allulose (a low‑calorie sugar found in small amounts in nature and typically made from corn), maltitol (a sugar alcohol that’s sweet but partially absorbed), and glycerin (a plant‑derived syrup) for moisture and sweetness.
That combo keeps sugars low and calories tight, but it’s also why some folks feel gassy or crampy—individual tolerance to sugar alcohols and chicory fiber varies a lot. Taste-wise, Amazon’s 4.
5‑ish average across thousands of ratings counters the harsher Reddit takes; call it chocolate‑chip‑adjacent rather than bakery‑case. Nutritionally, 10g protein is a “good boost,” not a post‑workout wallop.
It’s also not vegetarian (there’s collagen), not vegan, and not gluten‑free; it contains milk and soy. Keto‑leaning eaters may like the low sugar, but strict keto folks often avoid maltitol, so this is more keto‑ish than keto‑purist.
In other words: engineered on purpose, helpful if that’s what you want, fussy if it isn’t.
What's the bottom line?
Fiber One’s Chocolate Chip Protein Bar is a clever little fix: 10g of protein in 90 calories with a chocolate‑chip chew that scratches a sweet itch. It earns its numbers with protein isolates, chicory fiber, and modern sweeteners—great if you want a light, portion‑controlled bar, less great if you prefer whole‑food ingredients or you’re sensitive to sugar alcohols. Use it as a bridge snack, glove‑box backup, or late‑night dessert swap when you want something sweet without upending your day.
If you need a cleaner label, more fat‑driven satiety, or a bigger protein punch, look elsewhere. If your goal is “keep it small, keep it chocolatey, keep it protein‑forward,” this is one of the tidiest ways to do it—just start with one bar to see how your stomach feels.