The core tension of any fast is keeping autophagy active while not watching your muscle tissue catabolize. Plain water maintains the fasted state but does nothing to spare lean mass or blunt the afternoon hunger spike that derails most fasters. A collagen-rich, low-calorie broth bridges that gap — delivering glycine and proline for gut repair and skin elasticity without triggering the insulin response that stops fat burning. But not every pouch or scoop on the shelf is actually fast-safe; many contain hidden sugars, starches, or maltodextrin that spike glucose and break the fasted state before lunch.
I’m Mohammad — the founder and writer behind ProteinJug. I’ve spent years analyzing the amino acid profiles, protein bioavailability, and ingredient sourcing of bone broths to determine which products genuinely support intermittent fasting, OMAD, and extended fast protocols without undermining metabolic goals.
This guide walks through five options that meet strict fast-safe criteria — no hidden carbohydrates, no artificial fillers, and a protein source that won’t spike insulin. After evaluating dozens of labels and customer reports, I’ve settled on a lineup of the best bone broth for fasting that balances satiety, muscle sparing, and autophagy preservation.
How To Choose The Best Bone Broth For Fasting
Most people grab the first bone broth they see at the store and assume it’s fast-friendly because it’s “natural.” That assumption costs them hours of autophagy each time they sip. Here are the three non-negotiable criteria to check before buying.
Protein Grams Per Serving
Fasting purists advocate for zero amino acids to keep mTOR suppressed and autophagy elevated. In practice, up to roughly 15 grams of protein from collagen sources spares muscle without triggering a measurable insulin spike in most individuals. Broths that pack 20 grams or more per scoop push the boundary too far — they may stimulate mTOR and stall the cellular cleanup you’re fasting for. Look for a serving that delivers between 10 and 18 grams of protein from hydrolyzed collagen, which digests rapidly and passes through the gut without a large glucose response.
Ingredient Purity — No Hidden Fillers
Scan the ingredient list for anything ending in “-ose,” “-dextrin,” or “-malt.” Maltodextrin, tapioca starch, and chicory root fiber are common additions in powdered broths that increase bulk or improve mouthfeel, but they contribute digestible carbohydrates that break the fasted state. A clean label should list only bones, water, vegetables (optional), sea salt, and spices. If you see “natural flavors” or “yeast extract,” those are red flags — they often contain hidden glutamates that may trigger insulin secretion in sensitive individuals.
Sourcing and Collagen Content
Grass-fed and pasture-raised bones yield a higher ratio of type II collagen and glycine compared to grain-finished animals, which matters because glycine is the primary amino acid that supports glutathione production and liver detox during a fast. Hydrolyzed collagen (also called collagen peptides) breaks down into smaller chains that dissolve in cold or warm liquid without clumping, making it easier to sip throughout the day. Non-hydrolyzed broths require hot water to dissolve and may have a thicker mouthfeel but typically retain a more complete amino acid profile with gelatine intact.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Nutricost Beef Bone Broth Powder | Powder | High protein fasts | 19g protein per serving | Amazon |
| Ketostat Bone Broth Packets | Single Serve | On-the-go sipping | 16g protein, single-serve | Amazon |
| Grass-Fed Beef Bone Broth Concentrate | Concentrate | Daily value & versatility | 35 servings per bottle | Amazon |
| LonoLife Keto Chicken Bone Broth | Keto-Friendly | Chicken flavor seekers | 10g protein, 15 servings | Amazon |
| Brodo Broth Variety Pack | Ready-to-Drink | Chef-crafted flavors | 6 flavors, no concentrate | Amazon |
In‑Depth Reviews
1. Nutricost Beef Bone Broth Protein Powder Unflavored
Nutricost’s unflavored powder delivers 19 grams of protein per serving — the highest protein density in this lineup — making it the most effective option for muscle sparing during extended fasts. The source is hydrolyzed beef collagen, which means it dissolves in cold or hot liquids without clumping, and the GMP-certified facility ensures third-party testing for purity. Fasters who need to push past the 16-hour mark without losing lean mass will appreciate that each scoop provides nearly a full meal’s worth of collagen without added sugars or fillers.
Customer reports describe the flavor as a very mild beef stock — present but not overpowering. Several users mix it into coffee or savory dishes and report no noticeable taste alteration, though a minority note a residual beefy smell that may not suit everyone. For fasting purposes, the lack of any sweeteners or starches means it will not spike insulin, and the high protein content supports satiety longer than lower-dose alternatives.
The unflavored nature gives you complete control over how you consume it — sip it straight with hot water during a fast window, or blend it into soups and broths when you break your fast. At 20 servings per container, the value per gram of protein is exceptional among fast-safe options. The only caution is that the strong beef undertone may not be ideal for sweet smoothies or coffee drinks if you prefer a neutral taste.
Why it’s great
- Highest protein content (19g) for maximum muscle sparing
- GMP certified and third-party tested for purity
Good to know
- Unflavored still has a mild beef taste and smell
- May not dissolve completely in cold liquids without vigorous mixing
2. Ketostat Bone Broth Protein Powder Packets, Grass-Fed Beef (12 Pack)
Ketostat packages 16 grams of hydrolyzed beef collagen per single-serving packet, which hits the sweet spot for fasting — enough protein to sustain energy and prevent muscle breakdown, but low enough to avoid a significant mTOR spike. The grass-fed sourcing (pasture-raised, no added hormones) ensures a high glycine and proline content that supports gut lining repair during the fasted state. Each packet is pre-portioned for convenience, making it trivial to carry to the office, gym, or travel without measuring scoops.
Taste reviewers consistently rank this as the best-tasting option among the powders they’ve tried. Descriptors include “smooth,” “mild,” and “reminiscent of homemade broth,” with one user comparing the aroma to Cheetos — oddly pleasant. The packets dissolve easily in warm water, though some sediment at the bottom is normal and expected with bone broth. A few customers note a subtle mushroom-heavy flavor in certain batches, so those sensitive to umami notes should test a single pack before committing to a bulk case.
The main tradeoff is cost per serving compared to bulk powders. At 12 packets per box, heavier users may find themselves ordering frequently. However, the convenience factor for fasters who eat on specific windows (16:8, OMAD) is substantial — rip a packet, add hot water, and you have a clean, fast-safe beverage ready in 30 seconds without any cleanup or measuring.
Why it’s great
- Convenient single-serve packets ideal for travel or work
- Highly rated taste with minimal beefy aftertaste
Good to know
- Higher cost per serving than bulk powders
- Some natural sediment after mixing
3. Grass-Fed Beef Bone Broth Concentrate with Turmeric
This liquid concentrate from Best Bone Broth provides 35 servings per bottle — the highest volume in the list — making it the most economical option for daily fasters who sip broth regularly. The concentrate is made from grass-fed Australian and New Zealand beef, simmered for up to 48 hours to extract maximum collagen and amino acids. Each teaspoon mixed with hot water yields a savory broth that customers describe as a “hug in a mug.” The added turmeric root contributes curcumin, which may further support inflammation reduction during the stress of fasting.
The concentrate format is unique: you store the bottle in the fridge and scoop out a teaspoon when needed. This means zero preparation time, and because it’s not a powder, there’s no clumping or dissolving issues. Customers report noticeable improvements in joint comfort and skin smoothness after regular use, and many note that the turmeric flavor blends naturally with the beef base without being overpowering. One user did mention temporary body odor changes from the turmeric, which is a known side effect of curcumin supplementation.
The tradeoff is that the protein content per serving is lower than the powdered options — approximately 3-5 grams per teaspoon depending on how concentrated you make it. For fasters who prioritize protein density per calorie, the powders above may be more efficient. However, for those who want a very low-calorie, gut-soothing beverage that lasts for weeks and doubles as a cooking base, this concentrate is unbeatable.
Why it’s great
- 35 servings per bottle — excellent value over time
- Liquid concentrate dissolves instantly with no clumping
Good to know
- Lower protein per serving than powders
- Turmeric may cause mild body odor changes in some users
4. LonoLife Keto Chicken Bone Broth Powder Mix
LonoLife’s chicken bone broth is a departure from the beef-dominated category, offering a lighter, poultry-based alternative that many fasters find easier to sip repeatedly without palate fatigue. Each serving delivers 10 grams of collagen-rich protein, which is on the lower end but still sufficient for muscle sparing during shorter fasts (12–16 hours). The ingredient list is clean — no artificial colors, sweeteners, or preservatives — and the flavor profile includes chicory root, sea salt, and savory herbs that create a rich, almost soup-like experience.
Customer feedback is overwhelmingly positive on taste, with users calling it “delicious” and “the best broth ever.” Many drink it as a morning replacement for coffee or as a warm midday snack to curb hunger without breaking the fast. The 8-ounce container provides 15 servings, positioning it as a mid-range option in terms of value. It is also keto and paleo friendly, which aligns well with fasting protocols that overlap with those dietary approaches.
The primary limitation is the lower protein content — 10 grams per serving is adequate but not optimal for extended fasts beyond 24 hours where muscle preservation becomes more critical. Additionally, the chicken flavor may not appeal to everyone; those who prefer the savory depth of beef might find chicken broth too light. If you want a flavorful, easy-to-stomach option that helps you get through a standard daily fast, this is a solid choice.
Why it’s great
- Excellent chicken flavor that most users find delicious
- Clean, keto-friendly ingredient list with no artificial additives
Good to know
- Only 10g protein per serving — lower than beef options
- May not be as satiating for longer fasts
5. Brodo Broth Variety Pack
Brodo’s variety pack brings a chef-crafted, ready-to-drink option into the fast-friendly category. Each pouch is 8.3 ounces of liquid bone broth — not made from concentrate, no preservatives, and simmered from pasture-raised bones with vegetables and aromatics. The pack includes six distinct flavors: Chicken, Hearth, Deeply Rooted, Spicy Nonna, Tom Yum, and Tuscan Sun. For fasters who crave variety and find straight beef or chicken broths monotonous, this selection offers a rotating palette that keeps the fast enjoyable rather than a chore.
Created by James Beard Award-winning chef Marco Canora, the broth is noticeably higher quality in both flavor and texture than most shelf-stable options. Customers describe it as “rich” and “filling” without being too thick or watery. The single-serving pouches require no preparation — just warm and sip. It has become a favorite among post-surgery recovery patients and those on liquid fasting protocols who need real food flavor without breaking their metabolic goals. The main drawback reported is sodium content; some find the broth too salty, so those watching sodium intake should be mindful.
The cost per serving is significantly higher than bulk powder options, and the protein content is not listed on the label (estimated around 4–6 grams per pouch based on typical bone broth ranges). This makes Brodo more of a lifestyle indulgence than a protein optimization tool. For fasters who prioritize pleasure and variety during their eating windows, or those who use broth as a treat rather than a primary protein source, this premium pack is a worthy splurge.
Why it’s great
- Six unique chef-crafted flavors for variety
- Ready-to-drink with no mixing or preparation
Good to know
- Higher sodium content may not suit low-sodium diets
- Lower protein per serving compared to powders
FAQ
Will bone broth with 19g of protein break my fast?
Can I drink bone broth during an intermittent fast?
Final Thoughts: The Verdict
For most users, the best bone broth for fasting winner is the Nutricost Beef Bone Broth Protein Powder because it delivers the highest protein content (19g) at the best value per serving while being third-party tested for purity. If you want the convenience of single-serve packets for travel, grab the Ketostat Bone Broth Packets. And for a ready-to-drink, chef-crafted variety that makes fasting feel like a treat, nothing beats the Brodo Broth Variety Pack.