There is no published TUDCA for kids dosage, and adult products sell in 500 mg to 1,000 mg capsules and gummies instead. That figure is the only number most parents can find, which is why the same question lands in every liver-support aisle. A child is not a small adult here. The amount cannot simply be cut in half.
What TUDCA actually is on the label
Tauroursodeoxycholic acid is a bile acid, a compound your liver makes in small amounts and recycles through the gut. On a bottle it appears as "TUDCA" or "tauroursodeoxycholic acid," with the milligram figure describing the whole molecule, salts included. That matters because bile acid salts carry a lot of weight that is not the free acid. If you are comparing two products at 500 mg, you may be comparing different things without knowing it.
Labels rarely explain this. The number sits at the front, the compound name sits under it, and nothing tells you what fraction is active.
Why an adult TUDCA capsule cannot be halved for a child
Capsules are not scored, and the powder inside blends unevenly with the carrier. Splitting a 500 mg capsule gives you two piles that might contain 180 mg and 320 mg respectively, and you'd have no way to know which. Gummies are worse for this since you can't cut them evenly either. The two halves also may not hold together long enough to swallow.
Children also clear bile acids differently. Their enterohepatic circulation runs faster relative to body weight, and their livers are still developing the enzyme pathways that conjugate and excrete bile salts. A milligram per kilogram figure that works for an adult has no tested equivalent in a growing body.
If you're looking at our TUDCA 1000 mg gummies with milk thistle, the label says adults in the product name for a reason. It is not a marketing qualifier.
What forms are easiest to measure for a child
Liquid drops are the only format that lets you adjust a dose in small increments, and even then the bottle tells you the concentration per drop or per milliliter, not per kilogram of child. A liver support liquid drop can be measured to 0.25 mL if you use an oral syringe, which is far tighter than any capsule split.
That precision is a tool, not a permission slip. You can measure accurately and still measure the wrong amount.
Whole-food formats sit on the other end. A grass fed beef liver gummy delivers nutrients in a food matrix at a much lower concentration, and for a child the practical question is usually whether they'll eat it at all rather than how many milligrams it holds. Food-based liver support and purified bile acid are not interchangeable, so don't swap one for the other because the format is easier.
Upper limits by age, and what is missing
There is no established tolerable upper intake level for TUDCA at any age. That is not a green light. It means the research needed to set one has not been done in children, and the adult safety data comes largely from short trials at 500 mg to 1,500 mg per day in specific clinical settings.
What you can reason about are the pieces around it. Bile acid supplements sit in a pathway that interacts with fat absorption and with how the gut signals fullness. Fat-soluble vitamins A, D, E and K depend on that same bile flow, so if a child's fat absorption shifts, those vitamin levels can drift too. That is a mechanism, not a diagnosis, and it is one more reason a pediatrician should see the bottle before the child does.
Ages matter less than the individual case here. A 4 year old and a 14 year old are different patients, and a 14 year old is often dosed as an adult in practice because most trials enroll people over 18. The gap between 16 and 18 is where families guess most, and where a pharmacist is worth the ten minutes.
What to bring to the appointment
Bring the actual bottle, not a photo of the front. The supplement facts panel is what a clinician needs: the milligram figure, the serving size, the "other ingredients" list, and whether the product is a gummy, capsule, or drop. Note how many servings per container, because that tells you how long a supply lasts and whether the dose is sustainable.
Also write down what else the child takes, including multivitamins with vitamin A or D. Bile acid pathways and fat-soluble vitamins overlap, and that's the interaction most likely to be missed.
Check the daily essentials collection if you're building a routine and want to see what else typically joins a liver support product. Fewer items is usually better for a child. More on the broader range is in our product range.
One practical note. If a pediatrician gives you a number in milligrams per kilogram, ask them to convert it to milliliters of the specific product you own. That single step catches most dosing errors before they happen.
Frequently asked questions
Why can an adult capsule not be halved for a child?
Because the powder does not divide evenly, so each half can hold a different amount of the active compound. You end up guessing.
What are the upper limits by age?
No upper intake level has been set for TUDCA at any age, including adults. The absence of a limit is not evidence of safety in children.
Which forms are easiest to measure for a child?
Liquid drops measured with an oral syringe in 0.25 mL steps are the most controllable format available.
None of this replaces a pediatrician's judgment, and it shouldn't. The useful takeaway is narrower: adult TUDCA products are built around a 500 mg to 1,000 mg serving, a child's body handles bile acids on a different scale, and the dose question needs a person who can see the child and the label together.