TUDCA: The Liver Supplement Nobody Talks About

Mike’s Take: Most people have never heard of TUDCA. I first heard about it on a Dr. Eric Berg episode and went down the research rabbit hole. Now I take 500mg every morning. Here’s why.

Table Of Content

• What TUDCA Actually Is
• Why I Added TUDCA to My Stack
• My Dual-Layer Liver Strategy
• The Proof: My Liver Numbers
• What the Research Shows
• Strong Evidence (Clinical Use)
• Emerging Evidence (Beyond the Liver)
• The Honest Gap
• Who Should Consider TUDCA
• Dose, Brand, and Cost
• How TUDCA Fits Into My Full Stack
• TUDCA vs. Other Liver Supplements
• My Verdict
• Frequently Asked Questions
• What is TUDCA and what does it do?
• Is TUDCA safe to take daily?
• Can I take TUDCA with a statin?
• How much TUDCA should I take?
• Is TUDCA better than milk thistle?
• Get My Weekly Longevity Research Roundup
• Top Liver Support Supplements

TUDCA (tauroursodeoxycholic acid) is a bile acid supplement that supports liver function, bile flow, and cellular protection against ER stress. I added it to my 34-supplement daily stack specifically to protect my liver from processing all those capsules plus a statin — and my liver enzymes are now in the excellent range. At roughly $11 per month, it’s the cheapest insurance policy in my entire protocol.

Some links in this article are affiliate links. I earn a small commission if you purchase — at no extra cost to you. I only recommend products I personally use.

What TUDCA Actually Is

TUDCA stands for tauroursodeoxycholic acid. That name is a mouthful, so everyone just says TUDCA. It’s not a vitamin. It’s not an herb. It’s a bile salt — a water-soluble bile acid that your body actually produces in small amounts naturally.

Your gut bacteria convert a primary bile acid called UDCA into TUDCA by conjugating it with taurine. The problem: your body only makes tiny quantities. Supplemental TUDCA gives you a therapeutic dose that goes far beyond what your own biology can produce.

Here’s what makes TUDCA interesting. It’s been used clinically in Europe and China for decades to treat cholestatic liver diseases — conditions where bile flow gets blocked or sluggish. Italian and German doctors have been prescribing it long before the supplement industry picked it up. It’s not some new biohacking trend. It has actual clinical history behind it.

TUDCA works through three primary mechanisms:

• Bile flow support — It’s a hydrophilic (water-loving) bile acid that counteracts the toxic effects of hydrophobic bile acids that can damage liver cells.
• ER stress reduction — It acts as a chemical chaperone in the endoplasmic reticulum, helping proteins fold correctly and reducing cellular stress.
• Hepatocyte protection — It stabilizes cell membranes in the liver, protecting them from bile acid-induced damage.

Why I Added TUDCA to My Stack

I take about 34 supplements daily — 22 capsules in a few large handfuls each morning, plus D3, creatine, and an electrolyte powder separately. That’s a lot for the liver to process. Every single one of those supplements gets metabolized, broken down, and filtered through the same organ.

TUDCA is proactive protection. I’m not waiting for liver enzymes to spike — I’m preventing it.

Think about it this way. Your liver is a processing plant. I’m asking mine to handle my full daytime stack of 22 supplements, a statin (atorvastatin 20mg), plus everything I eat and drink. That’s a heavy workload. Most people never think about liver support until something shows up on bloodwork. By then you’re reacting, not protecting.

I’d rather spend $11/month on prevention than deal with elevated enzymes and a doctor telling me to cut back on supplements. That conversation isn’t happening because I got ahead of it.

My Dual-Layer Liver Strategy

I don’t rely on TUDCA alone. I run a two-supplement liver protection strategy that covers different mechanisms at different times of day.

Supplement	Dose	Timing	Mechanism	Monthly Cost
TUDCA (Double Wood)	500mg	Morning	Bile flow + ER stress protection	~$11
Milk Thistle (Nutricost)	5,000mg extract	Night	Antioxidant + liver cell regeneration	~$2

Two different mechanisms. Two different times of day. Around the clock coverage for about $13/month total.

TUDCA supports bile flow and protects liver cells from ER stress — it’s structural protection. Milk thistle (silymarin) works as an antioxidant that supports liver cell regeneration — it’s repair and recovery. Morning and night. Protection and repair. They complement each other instead of overlapping.

Some people ask whether they should take one or the other. My answer: take both. They’re dirt cheap and they do different things. If you’re running a serious supplement stack, $13/month for dual-layer liver protection is a no-brainer. Check the Interaction Checker if you want to verify they play well with the rest of your stack.

The Proof: My Liver Numbers

Talk is cheap. Here are my actual numbers.

My latest liver panel:
AST: 19 U/L (reference range: 0-40)
ALT: 16 U/L (reference range: 0-44)
Both in the excellent zone. Not just “normal” — excellent.

Context matters here. Those numbers are on approximately 34 daily supplements PLUS atorvastatin 20mg — a statin known to stress the liver. Statins are one of the most common causes of elevated liver enzymes. My functional medicine doctor watches this closely at every visit. She’s never flagged a concern.

Something is protecting my liver. I can’t run a controlled experiment on myself and isolate which supplement deserves credit. But the combination of TUDCA every morning and milk thistle every night has been my protocol for the past year, and the bloodwork speaks for itself.

If you’re not getting regular bloodwork done, you’re flying blind. I get a full panel every 6 months. AST and ALT are two of the first things I check. You can’t manage what you don’t measure.

What the Research Shows

I’ll be straight with you about where the science stands.

Strong Evidence (Clinical Use)

TUDCA has solid clinical data for cholestatic liver diseases. European studies going back to the 1990s show it improves bile flow, reduces liver enzyme levels, and protects hepatocytes in patients with liver conditions. It’s an approved treatment in several countries — not just a supplement store curiosity.

A key mechanism is its role as a chemical chaperone. Research published in the journal Science showed TUDCA reduces endoplasmic reticulum stress — a type of cellular stress linked to liver damage, insulin resistance, and neurodegenerative diseases. That ER stress reduction is what separates TUDCA from standard liver supplements.

Emerging Evidence (Beyond the Liver)

Early research points to neuroprotective potential. Animal studies suggest TUDCA may protect neurons from apoptosis in models of Parkinson’s, Huntington’s, and ALS. These are preliminary — don’t read too much into mouse studies. But the mechanism (reducing ER stress and preventing cell death) is relevant across multiple organ systems, not just the liver.

There’s also research on TUDCA and insulin sensitivity. A 2023 study found improvements in glucose metabolism markers, which connects to the ER stress pathway. Again, early data. But the direction is promising.

The Honest Gap

The research on healthy people taking TUDCA preventively is limited. Most human studies are on patients who already have liver disease. I’m making a bet based on the mechanism of action and my own lab results. That’s an honest assessment. I’m not going to tell you the science is settled for preventive use — it isn’t. But the risk profile is low, the cost is minimal, and my numbers look great. I’ll take those odds.

Who Should Consider TUDCA

TUDCA isn’t for everyone. Here’s who I think gets the most value from it:

• Anyone taking 10+ daily supplements — Your liver is processing all of them. Give it support.
• Anyone on liver-processed medications — Statins, NSAIDs, acetaminophen, certain antibiotics. If your medication has “may affect liver function” on the label, TUDCA is worth considering.
• Anyone with mildly elevated liver enzymes — AST or ALT creeping up? Talk to your doctor first, then consider adding TUDCA.
• Anyone running peptide protocols — Peptides add another processing load. I know people in the longevity community who stack peptides on top of 20+ supplements without a single liver support compound. That’s reckless.
• Anyone serious about long-term supplement use — If you plan to take supplements for decades, protect the organ that processes them.

Who should NOT just start TUDCA without medical guidance: anyone with active gallbladder issues, bile duct obstruction, or serious liver disease. TUDCA affects bile flow — if you have structural problems with your biliary system, talk to a gastroenterologist first.

Dose, Brand, and Cost

Here’s exactly what I take and what I spend.

Detail	My Protocol
Supplement	TUDCA (tauroursodeoxycholic acid)
Brand	Double Wood Supplements
Dose	500mg (one capsule)
Timing	Every morning with daytime stack
Monthly cost	~$11
Where I buy	Amazon

I chose Double Wood for a few reasons. They third-party test, they’ve been in the supplement space for years, and they price it reasonably. Some TUDCA brands charge $30-40 for the same dose — you don’t need to spend that much.

500mg is the standard dose in most studies and the most common capsule size. Some people take 250mg. I haven’t seen a strong reason to go higher than 500mg for preventive use. If you have existing liver issues, your doctor might suggest more — but that’s a medical decision, not a supplement decision.

How TUDCA Fits Into My Full Stack

TUDCA goes down every morning with the rest of my daytime supplements. It’s one capsule in the handful. No special timing required — it doesn’t need to be taken with food, though I usually take everything with breakfast.

It pairs well with NAC (N-acetyl cysteine), which supports glutathione production — another liver protection pathway. Between TUDCA, milk thistle, and NAC, my liver has three layers of support through three different mechanisms. Some would call that overkill. I call it being smart about longevity. You can also look at CoQ10 for additional cellular protection — it works at the mitochondrial level rather than the liver specifically, but the two complement each other.

TUDCA vs. Other Liver Supplements

People always want to know how TUDCA stacks up against the usual liver support options. Here’s my honest comparison.

Supplement	Mechanism	Best For	Monthly Cost
TUDCA	Bile flow + ER stress protection	Heavy supplement users, statin users	~$11
Milk Thistle	Antioxidant + cell regeneration	General liver support, alcohol users	~$2
NAC	Glutathione precursor	Detox support, acetaminophen users	~$8
Artichoke Extract	Bile production stimulation	Digestive support, mild liver support	~$6

My take: TUDCA and milk thistle together is the strongest two-supplement liver protocol you can build. If you’re only going to pick one, pick TUDCA — it does something no other supplement does (ER stress reduction as a chemical chaperone). If budget is tight, milk thistle vs. NAC is a closer call — both are cheap and effective through different pathways.

My Verdict

TUDCA is the supplement that protects all the other supplements. At $11/month, it’s cheap insurance for anyone running a serious stack.

I’ve been taking it daily for over a year. My liver enzymes are excellent despite a 34-supplement stack plus a statin. The clinical history in Europe is real. The mechanism of action makes biological sense. The cost is negligible.

If you take more than 10 supplements a day, you owe your liver some protection. TUDCA is where I’d start. Add milk thistle for $2/month and you’ve built a dual-layer defense for $13 total. That’s less than a single month of most supplements in your stack.

Your liver processes everything. Protect it.

Frequently Asked Questions

What is TUDCA and what does it do?

TUDCA (tauroursodeoxycholic acid) is a water-soluble bile acid that your body produces in small amounts. As a supplement, it supports bile flow, reduces endoplasmic reticulum stress, and protects liver cells. It’s been used clinically in Europe for cholestatic liver conditions for decades. For supplement users, it helps the liver handle the processing load of multiple daily capsules and medications.

Is TUDCA safe to take daily?

TUDCA has a strong safety profile in clinical studies at doses of 500-1,500mg daily. I take 500mg every morning and have for over a year with no side effects. Some people report mild digestive changes in the first few days. As with any supplement, check with your doctor if you have existing liver or gallbladder conditions — TUDCA affects bile flow, which matters if you have structural biliary issues.

Can I take TUDCA with a statin?

I take TUDCA alongside atorvastatin 20mg daily. My liver enzymes (AST 19, ALT 16) are in the excellent range. Some research suggests TUDCA may actually help protect the liver from statin-related stress. That said, always tell your prescribing doctor about every supplement you take. Don’t make medication decisions based on a blog post — including mine.

How much TUDCA should I take?

The standard preventive dose is 250-500mg daily. I take 500mg every morning. Clinical studies have used doses up to 1,500mg for liver disease patients. For general liver support alongside a supplement stack, 500mg is the sweet spot — it’s the most common capsule size and falls within the effective range in available research.

Is TUDCA better than milk thistle?

They do different things. TUDCA supports bile flow and reduces ER stress. Milk thistle (silymarin) is an antioxidant that supports liver cell regeneration. I take both — TUDCA in the morning, milk thistle at night. If I had to pick one, I’d choose TUDCA because its chemical chaperone function is unique. But at $2/month for milk thistle, there’s no good reason to skip it. The combination costs $13/month total and covers more ground than either one alone.

Medical Disclaimer: This article reflects my personal experience and research. I am not a doctor. Consult your healthcare provider before starting any supplement.