Best Low Calorie Keto Soy Protein Bars

Lowest Calorie Protein Bars that are Soy Protein and Keto
Ranking of lowest calorie protein bars filtered by: Soy Protein, Keto
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By Protein Bar Nerd
October 17, 2025

Rankings Overview

  1. 1. Fiber One
    Chocolate Fudge

    A 90‑calorie chocolate‑fudge bar that still packs 10g of protein and a soft, fudgy chew—unusually efficient for a dessert‑leaning snack.

  2. 2. Love Good Fats
    Chewy Nutty Lemon Coconut

    Lemon–coconut detour in a chocolate-heavy aisle, this Love Good Fats bar delivers dessert vibes at 150 calories with 11g of soy-forward protein and just 1g sugar.

  3. 3. Atkins
    Blueberry Greek Yogurt

    It’s one of the rare fruit-forward bars that actually nails a blueberry–Greek yogurt flavor while delivering 15 grams of protein at 190 calories and just 3 grams of sugar.

  4. 4. KIND
    Dark Chocolate Nut

    A real‑nut‑first protein bar: big roasted peanuts and almonds in dark chocolate delivering 12g of soy-based protein—and none of the chalky nougat.

Compare Best Low Calorie Keto Soy Protein Bars

BarCaloriesProteinCarbsFatSugarIngredientsAdditives
Fiber One
Chocolate Fudge
90101031174
Love Good Fats
Chewy Nutty Lemon Coconut
1501115101258
Atkins
Blueberry Greek Yogurt
190152193267
KIND
Dark Chocolate Nut
2401218178141

Under the Microscope

1.

Fiber One

Chocolate Fudge

Fiber One Chocolate Fudge protein bar product photo
Product image of Fiber One Chocolate Fudge protein bar
10g
Protein
3g
Fat
10g
Carbs
1g
Sugar
90
Calories
Allergens:Milk, Soybeans
Diet:Keto
Total Ingredients:17

What's in the Chocolate Fudge Fiber One bar?

Fiber One’s Chocolate Fudge Protein Bar is a deliberately light take on a chocolate fix: 90 calories, 10g protein, and a soft bite.

The protein comes from a blend—soy protein isolate does most of the lifting, with whey proteins and calcium caseinate (dairy) plus a small amount of collagen to keep the texture pliable.

Carbs lean on chicory root extract—a refined soluble fiber from chicory—and low‑calorie sweeteners rather than fruit or oats, while the fudge character is built from Dutch‑processed cocoa and cocoa powder. You’ll see 17 ingredients and four helper additives—emulsifiers and low‑calorie sweeteners—to keep it soft and sweet while holding calories down.

Big picture: it’s engineered for sweetness and softness without the calorie load.

Protein
10
15
Fat
3
9
Carbs
10
20
Sugar
1
4
Calories
90
210

What are people saying?

Main praise: Fans rave about the 10g‑for‑90‑calories deal and a genuinely chocolaty, chewy‑meets‑crunchy bite that curbs dessert cravings without feeling heavy.

Main criticism: Critics pick up artificial notes and report stomach upset from maltitol if they eat more than one, and the long, refined‑ingredient list (plus rising prices) doesn’t help.

Bottom Line

Reach for it when you want a low‑calorie chocolate fix with a meaningful protein bump—think afternoon slump, after‑dinner sweet craving, or a light pre‑meeting hold‑over. Less ideal if you’re sensitive to sugar alcohols or avoiding soy/dairy/collagen.

2.

Love Good Fats

Chewy Nutty Lemon Coconut

Love Good Fats Chewy Nutty Lemon Coconut protein bar product photo
Product image of Love Good Fats Chewy Nutty Lemon Coconut protein bar
11g
Protein
10g
Fat
15g
Carbs
1g
Sugar
150
Calories
Allergens:Milk, Tree Nuts, Coconuts, Soybeans
Diet:Keto, Vegetarian, Gluten-Free
Total Ingredients:25

What's in the Chewy Nutty Lemon Coconut Love Good Fats bar?

Bright lemon, toasted coconut, and a creamy “white chocolate” style coating make this bar feel like a summer snack in miniature.

The protein is mostly soy protein isolate (some of it in crunchy nuggets) with a small assist from milk protein isolate in the coating, so it’s a soy-first blend with a touch of dairy.

Carbs stay low in sugar by leaning on refined fibers—chicory-root fiber (inulin/oligofructose) and soluble corn fiber—plus a bit of glycerin for softness, and stevia for sweetness. Fats come from almonds and coconut, rounded out by palm-based oils in the coating, for a mix of unsaturated and saturated fats.

There are four familiar add-ins—glycerin, sunflower lecithin, stevia, and tocopherols—to keep texture, sweetness, and freshness on point.

Protein
11
15
Fat
10
9
Carbs
15
20
Sugar
1
4
Calories
150
210

What are people saying?

Main praise: Reviewers love how surprisingly satisfying it is for the calories, with a bright lemon–coconut flavor that breaks the chocolate monotony and a gentle sweetness that avoids sugar-crash vibes.

Main criticism: The texture can read dry or powdery for some, and the chicory-root fiber may bother sensitive stomachs—all while the protein tops out at a modest 11g.

Bottom Line

Low‑carb snackers who want a dessert‑y bite between meals, not a full meal replacement. Best if you tolerate chicory‑root fibers and soy and prefer moderate protein with a bright lemon‑coconut profile.

3.

Atkins

Blueberry Greek Yogurt

Atkins Blueberry Greek Yogurt protein bar product photo
Product image of Atkins Blueberry Greek Yogurt protein bar
15g
Protein
9g
Fat
21g
Carbs
3g
Sugar
190
Calories
Allergens:Milk, Tree Nuts, Coconuts, Soybeans
Diet:Keto
Total Ingredients:26

What's in the Blueberry Greek Yogurt Atkins bar?

Built for low-sugar seekers, Atkins’ Blueberry Greek Yogurt leans on a soy-anchored protein blend (with milk proteins and a touch of collagen) to reach 15 grams of protein. The blueberry-and-yogurt character comes from dried blueberries, Greek-style yogurt powder, a hint of apple juice concentrate, and a tart lift from citric and malic acids.

Carbs skew engineered rather than oat-heavy: polydextrose (a lab-made soluble fiber that adds bulk with fewer calories), glycerin (a plant-derived syrup for moisture), and refined rice starch/flour help keep sugars to 3 grams.

Fats come from palm kernel/palm oil and sunflower oil, with almonds and coconut adding richness for 9 grams total; the blend skews a bit more saturated than nut-butter-based bars. It’s a lighter 190-calorie bar with a longer label (26 ingredients and about seven functional additives, including sucralose, an artificial zero-calorie sweetener) that prioritizes taste and macros over pantry simplicity.

Protein
15
15
Fat
9
9
Carbs
21
20
Sugar
3
4
Calories
190
210

What are people saying?

Main praise: Reviewers say it tastes like a real blueberry snack and keeps cravings in check without the chalky protein aftertaste.

Main criticism: Critics call it too engineered—sucralose, added fibers, and palm-heavy fats—with occasional sticky-or-dry texture and possible GI grumbles if you double up.

Bottom Line

Low‑carb snackers who want a sweet, fruit‑forward break that won’t spike sugar; best as a mid‑morning or dessert‑y snack if you’re fine with sucralose, soy, and dairy.

4.

KIND

Dark Chocolate Nut

KIND Dark Chocolate Nut protein bar product photo
Product image of KIND Dark Chocolate Nut protein bar
12g
Protein
17g
Fat
18g
Carbs
8g
Sugar
240
Calories
Allergens:Tree Nuts, Peanuts, Soybeans
Diet:Vegetarian, Gluten-Free
Total Ingredients:14

What's in the Dark Chocolate Nut KIND bar?

True to its name, this bar is a pile of roasted peanuts and almonds held together and finished with real dark chocolate and a pinch of sea salt. The protein backbone is soy protein isolate, a concentrated, complete plant protein, with a smaller boost from the nuts themselves.

Sweetness and sticking power come from glucose syrup and honey (quick energy), steadied by chicory root fiber and the nut matrix so it doesn’t feel like a candy rush. Cocoa butter and a touch of palm kernel oil give the chocolate its clean snap.

The ingredient list is short and recognizable, with minimal additives (we count one: natural flavor).

Protein
12
15
Fat
17
9
Carbs
18
20
Sugar
8
4
Calories
240
210

What are people saying?

Main praise: Reviewers love that it tastes like actual food—crunchy nuts and true dark chocolate—with zero chalky aftertaste.

Main criticism: The 12g of protein and refined sweetness won’t thrill macro hawks, and chicory root fiber can bother sensitive stomachs.

Bottom Line

Best for an afternoon pick‑me‑up or travel snack when you want crunch and satiety without chasing 20–30 grams of protein; great for gluten‑free vegetarians who eat honey and soy.