Built Bar, Coconut Review
#7 of 8 · Best low-calorie treat✓ Label verified · Supplement Facts read Sep 7, 2026Real retailer photo, cut out. Label unedited.
Consider it. The low-calorie chocolate treat — ~130 cal, 17 g complete whey, just avoid the collagen 'Puff' version. A marshmallowy nougat dipped in real chocolate at only ~130 calories with 17 g of complete whey isolate (no collagen in the original line) and 4 g sugar on erythritol + soluble corn fiber.
$39 (18-pack)$2.17 / bar
Why It Scores 7.6 — And The Label Line Behind Each Number
Protein quality & amount
35% of score17 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.
- Protein
- 17 g (whey protein isolate + hydrolyzed whey isolate)
Ingredient quality
30% of score4 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 protein
20% of score~$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.
- Count / price
- 18-count box, ~$39
- Cost per bar
- ~$2.17
Taste & texture
15% of scoreA 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.
- Texture
- Marshmallowy nougat dipped in 100% real chocolate; gluten-free
Source-provenance & label honesty
0% of scoreNon-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.
- More Specs
- Sugar
- 4 g (erythritol + soluble corn fiber)
- Calories
- ~130
- Protein source
- Complete — whey isolate, no collagen in the original Built Bar line
- Watch out
- Avoid the 'Puff' line, which swaps in collagen
Label verified. Every figure read from the Supplement Facts photo, Sep 7, 2026.
Marketing Claims Vs. Reality
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.
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).
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.
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
The 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.
Buy 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.
17 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.
The 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.
Full analysis: all pros & cons (6), buy if / skip if
- 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
- 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)
- You want a chocolate-covered treat that barely dents your calorie budget (~130 cal)
- You want real, complete whey-isolate protein in a dessert-like bar
- You're in a calorie deficit and want maximum treat for minimum calories
- You want a full ~20 g of protein — this has 17
- You dislike a chewy, marshmallowy nougat texture
A marshmallowy nougat dipped in real chocolate at only ~130 calories with 17 g of complete whey isolate (no collagen in the original line) and 4 g sugar on erythritol + soluble corn fiber. The best calorie-to-treat ratio here. The honest notes: 17 g is under the ~20 g leaders, the nougat texture is divisive, and you must buy the original Built Bar, not the collagen 'Puff' line.
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.
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.
If This Doesn’t Fit — Try These
01David Protein Bar
If your complaint about protein bars is that you're paying for a candy bar with a protein number stapled on, David is the rebuttal: 28 grams of mostly-complete protein for just 150 calories and zero sugar, the best protein-to-calorie ratio of anything in this lineup, from a brand built around an actual science team.
02Quest Protein Bar
Quest is the bar most people should default to, and it earns that: 21 grams of genuinely complete protein from whey and milk isolate with no collagen padding, just 1 gram of sugar and 4 grams of net carbs, in flavors you can find at virtually any store.
03ONE Protein Bar
ONE is the bar to reach for when you want dessert and protein in the same wrapper: 20 grams of complete whey and milk isolate with just 1 gram of sugar, in flavors like Birthday Cake and Maple Glazed Doughnut that genuinely taste like the thing they're named after, with a soft candy-bar chew most bars can't match.
Quick Answers
How is Built only ~130 calories?
By using a light, aerated marshmallow-style nougat instead of a dense bar, keeping sugar to 4 g with erythritol and soluble corn fiber, and building the protein from lean whey isolate. That combination gives it the best calorie-to-treat ratio here.
What's the difference between Built Bar and Built Puff?
The original Built Bar uses complete whey isolate; the 'Puff' line swaps in collagen, an incomplete protein. For real, muscle-relevant protein, buy the original — and check the label, because the branding is close enough to cause mix-ups.
Is 17 g of protein enough?
It's complete whey isolate, so the quality is high, but 17 g is just under the ~20 g that maximally stimulates muscle protein synthesis (Moore 2009). As a low-calorie treat it's plenty; if you're using bars as primary protein feedings, the 20 g leaders edge it out.
Will I like the texture?
That's the main variable. Built's marshmallowy nougat is divisive — some love it, some find it oddly chewy. Buy a single bar before the 18-count box to find out, since texture, not macros, is what people react to most.
Sources & Further Reading
2 peer-reviewed sources, each linked to PubMed
- [1] Moore 2009 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.
- [2] Morton 2018 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.
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