Verified
“Only ~130 calories.”
The ~130-calorie figure is on the panel and is the lowest of any chocolate-covered bar here — the genuine basis for the 'best low-calorie treat' badge and its best-in-class calorie-to-treat ratio.
Reviewed
Verified by SAC team
+20
XP on completion
Best low-calorie treat
Built · 17g whey protein · 4g sugar · ~130 cal · 18-count
Built Bar, Coconut Review
7.6/10SAC Product Score™
Built is the bar for when you want something that eats like a candy bar but barely touches your calorie budget: a light, marshmallowy nougat dipped in real chocolate at only about 130 calories, carrying 17 grams of complete whey-isolate protein. Make sure you grab the original Built Bar and not the 'Puff' line, which swaps in collagen. The honest notes are that 17 grams is a touch under the 20-gram leaders, it relies on erythritol and soluble corn fiber to stay low-sugar, and the nougat texture genuinely divides people. But as a low-calorie chocolate treat that still delivers real, complete protein, nothing else here matches its calorie math.
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Read the complete Muscle Growth guide →How we built the SAC Product Score™ — 7.6/10
Protein quality & amount35%6.9/10
17 g from whey isolate and hydrolyzed whey isolate — complete and leucine-rich, with no collagen in the original line, but the amount sits just below the ~20 g standard and the ~20 g that maximizes MPS (Moore 2009). Quality is genuine; the sub-20 g count is the deduction on this axis.
Ingredient quality30%7.9/10
4 g sugar kept low with erythritol (a gentler sugar alcohol) and soluble corn fiber, dipped in 100% real chocolate, gluten-free. Decent and free of maltitol, but the soluble corn fiber is a mild caveat and it isn't as clean as the naturally-sweetened picks.
Value per gram of protein20%8.2/10
~$2.17/bar for 17 g is about $0.13 per gram — solid value, helped by the larger 18-count box. Good cost efficiency for a low-calorie chocolate treat, though as always powder and whole food beat it per gram.
Taste & texture15%7.9/10
A light, marshmallowy nougat in real dark chocolate that genuinely eats like dessert — but the nougat texture is love-it-or-hate-it, which is why it scores good rather than great. Impressive that it delivers this at ~130 calories.
Source-provenance & label honesty0%7.5/10
Non-weighted SAC transparency gate. The original Built Bar is honest complete whey isolate, but the brand also sells a collagen-based 'Puff' line under closely related branding — a real consumer-confusion risk, which is why this gate sits mid-pack rather than high.
The product at a glance
- Protein
- 17 g (whey protein isolate + hydrolyzed whey isolate)
- Sugar
- 4 g (erythritol + soluble corn fiber)
- Calories
- ~130
- Protein source
- Complete — whey isolate, no collagen in the original Built Bar line
- Texture
- Marshmallowy nougat dipped in 100% real chocolate; gluten-free
- Count / price
- 18-count box, ~$39
- Cost per bar
- ~$2.17
- Watch out
- Avoid the 'Puff' line, which swaps in collagen
Marketing claims vs. reality
Verified
“17 g of complete protein.”
The original Built Bar uses whey isolate and hydrolyzed whey isolate — complete, leucine-rich, no collagen. The quality claim holds; note the amount, 17 g, is slightly below the ~20 g MPS-maximizing dose (Moore 2009).
Verified
“Dipped in real chocolate.”
Built uses 100% real chocolate for the coating rather than a compound coating, which is verifiable on the ingredient panel and part of why it eats like dessert.
Partial
“Low sugar.”
At 4 g sugar it's genuinely low, kept there with erythritol and soluble corn fiber. Accurate, with the standard caveat that soluble corn fiber is more digestible than a true fiber — a minor note, far milder than a maltitol- or IMO-heavy bar.
What our test actually found
01The best calorie math of any treat here
At ~130 calories for a chocolate-covered bar with 17 g of complete protein, nothing else matches Built's calorie-to-treat ratio. In a deficit, it's the bar that lets you have dessert and barely move the needle on your daily calories.
02Buy the original — not the 'Puff' line
The critical caveat: Built also sells a 'Puff' line that swaps in collagen, an incomplete protein. The original Built Bar is honest whey isolate. Check the label so you don't accidentally pay for padded protein — this is the one trap with the brand.
0317 g is real but sub-dose
It's complete whey isolate, so quality is high, but 17 g is just under the ~20 g that maximally stimulates MPS (Moore 2009). For a treat that's fine; if you're using bars as your main protein feedings, the 20 g leaders edge it out.
04The nougat texture divides people
Built's signature is a light, marshmallowy nougat rather than a dense bar. Plenty love it; others find it oddly chewy. It's worth trying a single bar before committing to the 18-count box, because texture is the main thing people react to.
Pros & cons, no sugar-coating
Pros
- Only ~130 calories for a chocolate-covered bar — the best calorie-to-treat ratio here
- 17 g of complete whey-isolate protein (the original Built line; not the collagen 'Puff' version)
- Light, marshmallowy texture in 100% real dark chocolate — eats like dessert
- Solid value at ~$2.17 a bar in the larger 18-count box
Cons
- 17 g protein is slightly below the 20 g+ leaders
- Uses erythritol plus soluble corn fiber; texture is divisive (chewy/nougat, love-it-or-hate-it)
The low-calorie chocolate treat — unmatched calorie math, as long as you grab the original.
Built is the bar for when you want something that eats like a candy bar but barely touches your calorie budget: a light, marshmallowy nougat dipped in real chocolate at only about 130 calories, carrying 17 grams of complete whey-isolate protein. Make sure you grab the original Built Bar and not the collagen-based 'Puff' line. The honest notes are that 17 grams is a touch under the 20-gram leaders, it relies on erythritol and soluble corn fiber, and the nougat texture genuinely divides people. But as a low-calorie chocolate treat that still delivers real, complete protein, nothing else here matches its calorie math.
Check Built · 17g whey protein · 4g sugar · ~130 cal · 18-count on AmazonIf this doesn’t fit — try these
David Protein Bar, Chocolate Chip Cookie Dough
9.3/1028 g of mostly-complete protein for 150 calories — the pick if you love the low-calorie idea but want far more protein per bar.
See it on the list →Quest Protein Bar, Chocolate Chip Cookie Dough
9/1021 g of complete protein at 1 g sugar, available everywhere — the pick if you want a full 20-plus g and a firmer, more conventional texture.
See it on the list →ONE Protein Bar, Birthday Cake
8.7/1020 g of complete protein in genuinely dessert-like flavors — the pick if you want a more indulgent treat and can accept ~220 calories and IMO fiber.
See it on the list →Sources & further reading
- Moore 2009Moore DR, Robinson MJ, Fry JL, Tang JE, Glover EI, Wilkinson SB, Prior T, Tarnopolsky MA, Phillips SM · 2009 · The American Journal of Clinical Nutrition · PMID 19056590
Ingested protein dose response of muscle and albumin protein synthesis after resistance exercise in young men
~20 g of high-quality protein maximally stimulated MPS. Built's 17 g of complete whey isolate sits just under that dose — close, but a touch below optimal per feeding.
- Morton 2018Morton RW, Murphy KT, McKellar SR, Schoenfeld BJ, Henselmans M, Helms E, Aragon AA, Devries MC, Banfield L, Krieger JW, Phillips SM · 2018 · British Journal of Sports Medicine · PMID 28698222
A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults
Muscle gains track total daily protein. A 17 g Built bar is one convenient low-calorie contribution toward the daily total, especially useful when calories are tight.