No clinical trial has tested bone broth as a treatment for diverticulitis, so there is no direct evidence that it helps. The theoretical case, however, is more interesting than a flat “we don’t know.” Bone broth is a clear liquid rich in amino acids like glutamine and glycine, both of which have shown gut-protective effects in laboratory and animal studies. Whether those effects translate to meaningful relief during a diverticulitis flare or help prevent future episodes is a separate and much harder question.
Why Bone Broth Comes Up During Flares
When a pouch in your colon wall becomes inflamed or infected, the surrounding tissue swells, the colon narrows, and passing solid food becomes painful. Gastroenterologists have long noted that patients managed at home during a mild acute episode often feel better starting with clear liquids for the first few days before gradually reintroducing solid foods. The American College of Gastroenterology acknowledges this practice while noting that formal evidence guiding dietary choices during an acute episode is limited.1American Journal of Gastroenterology. ACG Clinical Guideline: Colonic Diverticulitis Clear liquids ease the burden on an irritated colon simply by being easy to digest and leaving minimal residue.
Bone broth qualifies as a clear liquid. It also brings along protein, electrolytes, and flavor, which makes it more palatable than plain water or diluted juice when you are feeling lousy and not eating much. For someone riding out a mild flare at home on a liquid diet, bone broth is a practical choice by default. The question people really want answered, though, is whether it does something above and beyond being a tolerable clear liquid. That is where the amino acid research comes in.
Glutamine and the Intestinal Lining
Glutamine is the most abundant amino acid in bone broth and, independently, the most studied amino acid in gut health research. Cells lining the intestine use glutamine as their primary fuel source. When glutamine is depleted, the tiny finger-like projections that absorb nutrients shrink, the proteins that seal the gaps between intestinal cells decrease, and the gut becomes leakier.2PubMed. Glutamine and the regulation of intestinal permeability: from bench to bedside Supplementing glutamine can reverse some of that damage in experimental models, restoring the expression of tight junction proteins and reducing permeability.
Animal studies reinforce this picture. In weanling piglets, glutamine supplementation improved intestinal permeability and increased the abundance of several key tight junction proteins, including occludin and claudin-1.3The Journal of Nutrition. Glutamine Enhances Tight Junction Protein Expression and Modulates Corticotropin-Releasing Factor Signaling in the Jejunum of Weanling Piglets That matters because a leakier gut wall can allow bacteria to cross into surrounding tissue, which is essentially the mechanism behind complicated diverticulitis. Keeping the barrier intact is, in theory, a good thing.
The catch is dose. These studies use purified glutamine at controlled concentrations. A cup of bone broth delivers some glutamine, but the amount varies wildly depending on how it was made, what bones were used, and how long it simmered. Nobody has measured whether the glutamine in a typical serving of home-cooked bone broth is enough to produce the barrier-strengthening effects seen in lab settings. The gap between “glutamine helps the gut lining” and “a bowl of bone broth delivers enough glutamine to help your gut lining” remains unfilled.
Glycine and Inflammation
Glycine is the second headline amino acid in bone broth, largely because collagen, which dissolves out of bones during cooking, is roughly one-third glycine by weight. Research on glycine as an anti-inflammatory agent has accumulated steadily. Glycine tamps down inflammation by modulating the activity of NF-κB, a signaling molecule that acts as a master switch for inflammatory gene expression in many cell types.4PubMed Central. Glycine: The Smallest Anti-Inflammatory Micronutrient
In mice exposed to bacterial toxins that trigger intestinal inflammation, glycine supplementation reduced the expression of inflammatory signals in both the small intestine and colon and decreased the infiltration of immune cells into colon tissue.5PubMed. Protective effects of glycine against lipopolysaccharide-induced intestinal apoptosis and inflammation Diverticulitis involves exactly this kind of localized colonic inflammation, so on paper, a compound that calms that response sounds useful.
Again, though, the research uses isolated glycine at specific doses administered directly, not glycine arriving alongside a complex mix of other nutrients in a simmered broth. Bone broth is a food, not a pharmaceutical preparation. The glycine research tells us the amino acid has anti-inflammatory properties; it does not tell us that eating foods containing glycine produces clinically meaningful anti-inflammatory effects in a human colon during a diverticulitis flare. That leap has not been tested.
Collagen Peptides and Gut Barrier Repair
Beyond individual amino acids, the collagen fragments themselves appear to have gut-protective properties that exceed what their amino acid building blocks do alone. When collagen is cooked, it breaks down into gelatin, and gelatin further breaks down during digestion into smaller collagen peptides. A growing body of lab and animal work suggests these peptides actively support the intestinal barrier.
In cell culture models, collagen peptides counteracted the barrier-damaging effects of TNF-α, an inflammatory molecule central to gut inflammation. The peptides preserved the expression of tight junction proteins like ZO-1 and occludin and suppressed the NF-κB signaling pathway.6PubMed. Collagen peptides ameliorate intestinal epithelial barrier dysfunction in immunostimulatory Caco-2 cell monolayers via enhancing tight junctions Similar results appeared in a study using fish-derived collagen hydrolysates, which improved clinical signs of colitis in mice and enhanced occludin expression in colon tissue.7International Journal of Biological Macromolecules. Purified fish skin collagen hydrolysate attenuates TNF-α induced barrier dysfunction in-vitro and DSS induced colitis in-vivo model
In a mouse model of chronic colitis, collagen peptides derived from gelatin improved clinical signs and colon tissue damage in a dose-dependent fashion. The researchers found that the intact peptides activated protective stress-response pathways that individual amino acids like glycine and proline did not, suggesting the peptides have effects beyond what you would get from their component parts.8PubMed. Collagen Peptides Ameliorate Murine Chronic Colitis: Toward the Molecular Basis for Their Enhancement of Intestinal Epithelial Defenses Against Oxidative Stress Meanwhile, gelatin itself reduced inflammatory cytokines in colon tissue of mice with experimentally induced colitis, while its degradation products, glycine and prolyl-hydroxyproline, lowered inflammation in both the colon and blood.9PubMed Central. Gelatin versus its two major degradation products, prolyl-hydroxyproline and glycine, as supportive therapy in experimental colitis in mice
These findings are encouraging and directly relevant to the kind of barrier breakdown and inflammation that characterizes diverticulitis. But it is worth being honest about where we are: virtually all of this evidence comes from lab dishes and mice with chemically induced colitis, not from humans with diverticulitis. The distance between a Caco-2 cell monolayer in a petri dish and your inflamed sigmoid colon is enormous. A 2025 review in Digestive Diseases and Sciences summarized the available evidence on bone broth’s amino acids, minerals, and their impact on gut barrier integrity, concluding that the nutrients in bone broth are genuinely beneficial for intestinal health in experimental settings.10PubMed. Bone Broth Benefits: How Its Nutrients Fortify Gut Barrier in Health and Disease “Genuinely beneficial in experimental settings” is real and meaningful. It is also not the same as “proven to help people with diverticulitis.”
Bone Broth and the Gut Microbiome
A newer line of research looks at how collagen hydrolysates from bone affect gut bacteria. In mice, supplementation with bone-derived collagen hydrolysates shifted the microbial community in a potentially favorable direction, lowering the ratio of Firmicutes to Bacteroidetes and boosting the production of short-chain fatty acids. One study found that a medium dose increased acetic acid, propionic acid, and butyric acid concentrations by roughly 80% compared to controls.11Food Science and Human Wellness. Supplementation with yak (Bos grunniens) bone collagen hydrolysate altered the structure of gut microbiota and elevated short-chain fatty acid production in mice A separate study using similar collagen hydrolysates found a roughly 30 to 37% decrease in the Firmicutes-to-Bacteroidetes ratio and a 50% increase in total short-chain fatty acid concentration.12Food Bioscience. Simulated gastrointestinal digestion of yak bone collagen hydrolysates and insights into its effects on gut microbiota composition in mice
Short-chain fatty acids, particularly butyrate, are the primary fuel source for colon lining cells and have well-documented anti-inflammatory effects in the gut. A colon that produces more butyrate tends to maintain a healthier barrier and a calmer immune environment. For someone prone to diverticulitis, this is theoretically relevant: a healthier mucosal environment might reduce the risk of future pouches becoming inflamed. But these are mouse studies using concentrated collagen hydrolysates, not people sipping broth. The microbiome angle is promising but very early-stage.
The Nutritional Reality Check
Bone broth has a reputation as a nutrient powerhouse, but chemical analysis tells a less glamorous story. A 2024 study examining the elemental composition of various broths found that despite significant variability across samples, the mineral content generally fell far short of expectations. Calcium, copper, iron, and magnesium in the broths tested did not even reach 5% of the recommended daily intake per serving.13European Food Research and Technology. Nutritional insights into broths in relation to elemental composition
This matters because part of the online mythology around bone broth and gut healing involves mineral replenishment. If you are on a liquid diet during a flare and losing electrolytes, bone broth helps primarily by providing sodium and some potassium from the cooking liquid and added salt, not because it is extracting therapeutically relevant doses of calcium or magnesium from the bones. You are better off thinking of bone broth as a warm, protein-containing liquid that keeps you hydrated and fed during a rough stretch, rather than a mineral supplement in disguise.
Lead and Heavy Metal Concerns
Bones store heavy metals accumulated over an animal’s lifetime, and cooking them releases some of that stored material into the broth. A small controlled study found that organic chicken bone broth contained several times the lead concentration of the cooking water alone. Broth made from bones reached about 7 micrograms per liter, and broth made from skin and cartilage cooked on the bone hit about 9.5 micrograms per liter, compared to roughly 0.89 micrograms per liter for the water used to make them.14PubMed. The risk of lead contamination in bone broth diets
Before you panic, context matters. A follow-up analysis of various animal bone broths concluded that the actual risk from lead and cadmium at these levels is minimal, because the concentrations amount to only a few micrograms per serving.15PubMed Central. Essential and toxic metals in animal bone broths For most people drinking a cup or two a day during a short flare, this is not a meaningful health risk. It becomes more relevant if you are drinking large quantities daily for extended periods, or if you are pregnant, or if you already have high lead exposure from other sources. If you fall into any of those categories, it is worth discussing with your doctor rather than making bone broth the cornerstone of a long-term gut protocol.
What the Evidence Actually Supports for Prevention
If your real concern is keeping diverticulitis from coming back, the evidence points away from any single food and toward broader dietary patterns. A survey of patients who had experienced diverticulitis found that high fiber intake was the most common dietary change adopted to prevent recurrence, made by about 59% of respondents. The Mediterranean diet was the second most common shift, chosen by about 26%.16BMC Research Notes. Dietary modifications to prevent recurrent diverticulitis Among those who tried a Mediterranean pattern, adherence varied: roughly 45% reported modest adherence and about 20% reported strict or high adherence.
The rationale behind fiber is straightforward. A diet rich in fiber increases stool bulk and softness, which reduces the pressure inside the colon. Lower pressure means less force pushing against the colon wall, which may slow the formation of new diverticular pouches and reduce the chance that existing ones become inflamed. The Mediterranean diet overlaps with this approach because it is inherently high in vegetables, legumes, whole grains, and fruit, while also including anti-inflammatory fats from olive oil and fish.
Bone broth does not conflict with either of these approaches, but it also does not substitute for them. During an acute flare when you are on liquids, bone broth makes sense as a comfortable, protein-containing option. Once you are eating solid food again, the priority shifts to gradually reintroducing fiber-rich foods and building a dietary pattern that keeps your colon healthy long-term. Treating bone broth as a preventive strategy on its own would be putting far too much weight on a food whose benefits, while biologically plausible, have not been demonstrated in people with this condition.
Where Bone Broth Fits in Practice
The honest picture is this: bone broth contains amino acids and collagen fragments that have real, documented effects on gut barrier integrity and inflammation in experimental settings. These effects are relevant to the kind of damage that diverticulitis causes. But nobody has run a trial giving bone broth to diverticulitis patients and measuring outcomes. What we have is a plausible mechanism, encouraging lab data, and zero clinical confirmation.
For practical purposes, bone broth works well as part of a clear liquid diet during a mild acute episode. It provides hydration, electrolytes, some protein, and enough flavor to make a miserable few days slightly less miserable. It is unlikely to cause harm at normal consumption levels, and the lead concern is minimal for short-term use. Once the flare resolves and you start eating normally again, the smart move is to focus on fiber, whole foods, and the broader dietary patterns that have actual evidence behind them for preventing recurrence. Think of bone broth as a useful tool during the acute window and a pleasant addition to your regular diet if you enjoy it, but not as medicine.