What My Grandmother Never Knew: The Real Science Behind Bone Broth

There's a pot on my stove right now, bones and vegetable scraps simmering away, because it's a rainy, gray kind of day, and honestly, is there any better excuse? But here's the thing — I didn't inherit this from anyone. My own grandmother never made bone broth, never touched a home remedy, never really connected food and healing at all. She ate the standard American diet, developed type 2 diabetes, and later died of colon cancer. There was no wisdom passed down in my family about this kind of thing. I've had to go find it myself.

So when I talk about traditions like bone broth, I'm not the girl reviving Grandma's secret recipe. I'm the girl who looked at what her family didn't have and went looking elsewhere for it.

Turns Out, Everyone Else's Grandma Had a Version

This isn't just a "my family" thing (well, clearly, not my family) — it's basically a universal instinct. Jewish households have chicken soup. Vietnamese cooking has pho. Chinese and other East Asian traditions have congee and long-simmered bone stocks. Wildly different cultures, oceans apart, all landed on the same idea completely independently: simmer bones and connective tissue for hours, and you get something that helps people feel better when they're down.

When that many unrelated traditions all land on the same practice, it's worth asking what's actually happening in there.

Okay, But What's Actually IN Bone Broth

When you simmer bones and connective tissue low and slow, the collagen breaks down. It turns into gelatin and free amino acids — mainly glycine, proline, hydroxyproline, and glutamine. Not exotic, mystery compounds.

These are the same building blocks your body already uses for your gut lining, your joints, and your skin.

Here's the research, broken down honestly — what's solid, and what's still catching up:

The well-established stuff:

• Joint health — a 2024 meta-analysis of 35 randomized controlled trials (over 3,000 people) found collagen derivatives actually reduced pain and improved function in hip and knee osteoarthritis, with no bump in side effects. That's real clinical backing, not wellness-blog hype.

• Sleep — glycine has decent research behind it too. Studies found a few grams before bed improved sleep quality and cut next-day grogginess in people who struggled to sleep.

The promising-but-not-fully-proven stuff (this is the gut health part, so pay attention):

• Glutamine is literally the primary fuel source for the cells lining your intestine.

• Glycine has documented anti-inflammatory properties that support your gut's mucosal lining.

• In animal studies, bone broth and its amino acids have reduced intestinal inflammation, strengthened tight junction proteins (basically the "seals" between gut cells that control what gets through), and reduced measurable intestinal permeability.

• A 2025 review co-authored by a Mayo Clinic gastroenterologist looked specifically at bone broth's nutrients and gut barrier function, and found real, mechanism-backed reasons to think it supports the gut barrier and calms inflammation — while being upfront that a lot of that evidence is still from individual amino acid studies and animal models, not massive human trials of broth itself.

Here's my honest take: that gap doesn't mean the tradition is bogus. It means the biology is genuinely sound and well-documented, while the "gold standard, drug-approval-level" human trials on whole broth just aren't fully there yet. Both things are true at once, and I think that's a more interesting story than either "it's basically medicine" or "it's just a placebo in a mug."

Where I stay careful: I won't tell you bone broth cures a diagnosed condition, and I'd never suggest skipping medical treatment for something like IBD in favor of soup. But saying it can genuinely support gut healing, backed by real amino acid science? That, I'll stand behind.

How I Actually Make It (GERD Edition)

For me, this isn't a "protocol" — it's just using what I've already got. I freeze scraps and bones until I have enough, simmer for 12+ hours, and use it as a soup base or just sip it plain on a day like today.

One thing worth mentioning: I have GERD, so I pay attention to what goes into mine. Heavy garlic, onion, or a lot of fat can be reflux triggers for some people — myself included — so I keep my version simple and just watch how my body responds. That's true of most foods when you're dealing with reflux, honestly. It's less about labeling foods as "good" or "bad," and more about understanding how my gut actually responds to them.

My Go-To Recipe (GERD-friendly, low-fuss):

Makes about 8 cups

• 2–3 lbs bones (chicken carcass/wings, or beef marrow/knuckle bones)

• 1 tbsp apple cider vinegar (helps pull minerals from the bones)

• 1 carrot, roughly chopped

• 1–2 celery stalks, roughly chopped

• Water to cover (about 10–12 cups)

• Salt to taste at the end

Note: I skip onion and garlic in mine since they're common reflux triggers — swap in a bit of fresh ginger or a bay leaf instead if you want more depth without the trigger risk.

1. Add bones and vinegar to a large stockpot or slow cooker. Let sit 20–30 minutes before adding heat — this helps the vinegar start pulling minerals out.

2. Add vegetables and cover with water.

3. Bring to a gentle simmer, then reduce the heat as low as it goes. Skim off any foam that rises in the first hour.

4. Simmer 12–24 hours (stovetop on low, slow cooker on low, or Instant Pot on high pressure for 2–3 hours if you're short on time).

5. Strain, salt to taste, and store. Keeps 5 days in the fridge, or freeze in portions for up to 6 months.

Building Instead of Inheriting

This is kind of the whole point of what I'm doing here. Not everyone grows up with this kind of wisdom — I didn't. But that doesn't put it out of reach. You can go find it, piece it together yourself, and decide what you're going to pass down differently. I'd argue that's just as valid as growing up with it.

Quick recap, if you're skimming: bone broth has solid research supporting its use for joints and sleep, promising but still developing research for gut health, and it's not a cure for anything diagnosed. It's a nutrient-dense food worth including — not a miracle, just genuinely useful.

So tell me, did your family hand down food traditions, or are you building your own from scratch, like I am? I genuinely want to know which camp you're in.

Sources: 2024 meta-analysis on collagen and osteoarthritis; Matar, Abdelnaem & Camilleri, "Bone Broth Benefits: How Its Nutrients Fortify Gut Barrier in Health and Disease," Digestive Diseases and Sciences (2025); animal studies on bone broth, tight junction proteins, and intestinal permeability; research on glycine, glutamine, and gut mucosal support; studies on glycine and sleep.