Top 10 · Updated October 2026

Lowest-Calorie Protein Energy Bars

The 10 lightest protein energy bars products on this list range from 40.6 to 233 kcal per 100 g. The protein energy bars with the fewest calories per 100 g, so you can compare energy density at a glance. We checked 421 protein energy bars with complete data.

1

ULTRA PROTEIN high protein milk shake salted caramel

Slate · 15 fl oz

NOVA 4 41 kcal 0.2 g sugar 9.5 g protein 0 g fat
2

Nutrient+ Lady

nutritional way · 35 g

NOVA 4 134 kcal 7 g sugar 4.5 g protein 5.6 g fat

Also: Palm oil free · No additives
3

Cookies and crème protein bar

QUESt · 52 grams

NOVA 4 150 kcal 1 g sugar 18 g protein 6 g fat
4

IQ Bar

a NOVA 4 186 kcal 1 g sugar 12 g protein 10 g fat

Also: No additives
5

Layered Lean Bar Coconut Caramel

GNC Total Lean · 1.55 oz

a NOVA 4 190 kcal 5 g sugar 16 g protein 7 g fat
6

Built Bar double chocolate

· 53 g

NOVA 4 207 kcal 7.6 g sugar 28.3 g protein 7.6 g fat
7

Atlas protein bar

Atlas

210 kcal 1 g sugar 20 g protein 8 g fat
8

Protein Bar

power crunch · 1.4oz

NOVA 4 213 kcal 5 g sugar 13 g protein 13 g fat
9

Aloha chocolate fudge brownie

ALOHA

NOVA 3 220 kcal 14 g protein 9 g fat

Also: Vegan · Vegetarian · No additives
10

Protein Brownie glazed cinnamon roll

Prime Bites · 2.29 oz

NOVA 4 233 kcal 6 g sugar 19 g protein 9 g fat

Also: Palm oil free

How we built this list

We ranked all published protein energy bars on Foodmetria that have a photo and the required nutrition data, using values per 100 g from the product label. Ties are broken by Nutri-Score and by how often shoppers scan the product. Rankings update automatically as label data changes. Read our methodology.

More protein energy bars rankings

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