CDG 500mg.
CDG 500mg supplementation for targeted health support. Inhibits beta-glucuronidase enzyme, supporting the liver's glucuronidation pathway. Helps eliminate estrogen and other compounds that would otherwise be reabsorbed.
Reviewed March 2026
- Category
- Hormone
What CDG 500mg is, and what it does.
- Does it work
- Mechanism is sound. Clinical evidence is limited. May help estrogen-dominant individuals.
- How much to take
- 500mg 2-3 times daily is common. 1500-3000mg total daily.
- Time to feel it
- There is no sensation to time here. It acts on how conjugated compounds leave the body, and that shows up on a urine or blood measure over weeks rather than in how you feel.
- The first dose
- Day one is quiet. It starts acting on how conjugated compounds are handled in the gut lumen, and that shows up on a urine or blood measure rather than in how the day goes.
- With regular use
- Potential hormone balance improvements.
- How well tolerated
- Well tolerated in the human work done so far, with occasional mild digestive upset. Glucuronidation is a clearance route for many medicines, so tell your prescriber before you start.
- How it feels
- There is no sensation attached to it. The work happens in the gut lumen and the liver's conjugation route, and it reads on a lab measure rather than in your afternoon.
- The overlooked benefit
- Glucaric acid is not exotic. Your own body makes it from glucuronic acid, and oranges, apples and cruciferous vegetables carry it, just at everyday food levels.
200 to 500mg a day is where CDG 500mg works.
Source: Altern Med Rev. 2002;7(4):336-339. Calcium D-Glucarate detoxification.
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
- Inhibits beta-glucuronidaseMechanism well-established in biochemistry
- Supports estrogen eliminationFollows from mechanism, limited direct human evidence
- Cancer preventionAnimal studies promising, human evidence lacking
Questions people ask about CDG 500mg.
- What is glucuronidation?
- Liver phase II detox pathway. Attaches glucuronic acid to toxins and hormones for elimination.
- Is 500mg enough?
- It's a starting dose. Most protocols use 500mg 2-3x daily for 1500-3000mg total.
- Does it lower estrogen?
- It helps eliminate estrogen metabolites. May help with estrogen dominance but won't crash estrogen.
- Good for men too?
- Yes. Men also benefit from proper estrogen metabolism. Common in male hormone optimization.
- How long to see effects?
- Weeks to months. This supports a gradual process, not immediate changes.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
DIM shifts oestrogen hydroxylation toward the 2-hydroxy route, and calcium D-glucarate acts one step later by slowing bacterial beta-glucuronidase so the glucuronide conjugates stay conjugated for excretion. The pair covers phase one and the exit step of the same route.
Sulforaphane is an Nrf2 activator that raises expression of the UGT conjugating enzymes, while calcium D-glucarate reduces the deconjugation that undoes their work in the gut. One raises conjugation, the other keeps it.
The beta-glucuronidase that calcium D-glucarate inhibits is largely bacterial in origin, and the composition of the gut community sets how much of it is present. Shifting that community changes the enzyme load the glucarate is acting against.
Conjugates that stay conjugated still need to leave the tract, and viscous fibre shortens transit and binds bile components on the way out. The two act at consecutive points of the same exit path.
Beta-glucuronidase in the colon is bacterial, so anything that changes which bacteria dominate changes how much of that enzyme activity is present. Calcium D-glucarate works on the enzyme through its lactone; a prebiotic works on the organisms making it. The two act at different points on the same step, and the pairing has not been measured as a combination.
Like other prebiotic oligosaccharides, GOS feeds bifidobacteria preferentially and changes the microbial profile that produces luminal enzymes. That is a plausible upstream lever on beta-glucuronidase activity. It has not been tested alongside calcium D-glucarate.
FOS is a short-chain fermentable oligosaccharide with the same general mode as inulin. Changing which organisms are abundant changes the pool of bacterial enzymes acting on conjugates in the gut lumen. No combination data exists for this pairing.
Fermentation of resistant starch acidifies the colonic lumen and feeds saccharolytic organisms over proteolytic ones. Bacterial enzyme activity in that environment differs from the activity in a less-fermentative colon. The link to beta-glucuronidase is inferential.
A transient yeast can shift the balance of resident organisms while it passes through. Since the enzyme in question is bacterial, a change in the bacterial community is the relevant variable. This is mechanistic reasoning about the same step, not a measured pairing.
Anything conjugated and excreted in bile has to get through the colon before it leaves the body. Soluble fibre both shortens the transit time available for deconjugation and reabsorption and feeds fermentation. That is the same excretion step calcium D-glucarate is aimed at, approached from the physical side.
Glutathione conjugation and glucuronidation are two branches of the same conjugation stage of metabolism. Naming both makes the picture accurate, since a compound routed down one branch is not available to the other. Oral glutathione absorption is its own separate question.
Sulforaphane raises the expression of the enzymes that attach glucuronic acid in the first place, while calcium D-glucarate is aimed at keeping those glucuronides intact in the gut. Induction upstream and stability downstream are complementary positions on one pathway. The pairing is standard formulation logic rather than a tested combination.
Methylation is a third conjugation route, distinct from glucuronidation and glutathione conjugation, and it depends on methyl group supply. Folate status sits upstream of that supply. This describes parallel elimination chemistry, not an effect measured for the two together.
Methyl conjugation runs on S-adenosylmethionine, and supplying it directly supplies that route. It sits alongside glucuronidation rather than feeding into it. Anyone stacking these is covering two conjugation branches, which is worth stating plainly.
Betaine keeps the methionine cycle turning through a folate-independent route, which maintains the methyl donor used in methyl conjugation. That is a parallel elimination pathway to the one calcium D-glucarate touches. Positioning only, with no combination evidence.
A glucuronide formed in the liver leaves largely in bile. Increasing bile flow moves more of that conjugated material into the intestine, which is exactly where calcium D-glucarate's lactone is meant to keep it conjugated. The two steps are sequential, and the pairing has not been studied.
Silybin is a high-turnover substrate for glucuronidation, so it occupies the same conjugating capacity. That makes the pairing a shared-pathway interaction worth naming rather than an assumed benefit. Direction of effect is not established.
A dose of the salt carries a calcium fraction that counts toward the day's calcium total. Anyone already taking a calcium supplement should add the two rather than ignore the salt. This is arithmetic, not a synergy.
Calcium salts interfere with non-heme iron uptake when both arrive in the gut together, an interaction documented well enough to be textbook. Since calcium D-glucarate delivers calcium, the same timing caution applies. Separating the doses by a few hours is the usual formulation answer.
Divalent mineral absorption is partly shared and partly competitive, and large calcium doses have been reported to lower zinc uptake taken together. The calcium in this salt makes it a relevant consideration in a stack. Dose separation is the practical response.
Charcoal is non-selective, so anything sharing the gut with it is liable to be adsorbed rather than absorbed. Taking it in the same window as calcium D-glucarate undercuts the point of the dose. Timing them well apart is the only sensible approach.
Nothing specific on file for CDG 500mg. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What CDG 500mg actually does.
Calcium D-glucarate is the calcium salt of D-glucaric acid, a six-carbon sugar acid formed in the body by oxidation of glucuronic acid.
In the acidic environment of the stomach and in the gut lumen, D-glucaric acid partially cyclises to D-glucaro-1,4-lactone, which is the form that inhibits beta-glucuronidase; the free acid itself is a much weaker inhibitor.
Beta-glucuronidase hydrolyses the glucuronide bond, releasing the parent compound from its conjugate; the enzyme is present in intestinal tissue and is produced in quantity by colonic bacteria.
Glucuronidation by UDP-glucuronosyltransferase enzymes attaches glucuronic acid to steroid hormones, bilirubin, many drugs and other lipophilic compounds, converting them into water-soluble conjugates for excretion in bile and urine.
Where CDG 500mg comes from.
It starts as ordinary glucose. Both ends of the sugar are oxidised to make glucaric acid, then the acid is paired with calcium so it stays stable as a powder in a capsule. The same acid does occur in fruit and vegetables, just not in the amounts used in a supplement.
Chemically synthesised. The molecule is identical to the one a plant or an animal makes, and building it deliberately means a known purity, a fixed dose and no crop contaminants. For several nutrients this is the only route that reaches a usable amount.
Manufacture starts from D-glucose, usually derived from corn or another starch crop.
Both the C1 aldehyde and the C6 primary alcohol of glucose are oxidised to carboxylic acids, classically with nitric acid and in newer routes with catalytic or biocatalytic oxidation.
The reaction mixture is worked up to separate D-glucaric acid from partially oxidised by-products such as gluconic and oxalic acid.
The acid is neutralised with a calcium source to give calcium D-glucarate, then dried, milled and blended for tabletting or encapsulation at a stated dose.
Getting CDG 500mg from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.