The Pattern Across the Aisle
If you walk through the supplement section of any pharmacy and check the labels on every product that contains DHM, you find a remarkably consistent pattern. The dose is almost always in the 100mg to 300mg range per serving. A handful of products go up to 600mg. Almost none cross 1,000mg. The pattern holds across price tiers, across brands, and across countries.
The reason isn't that 100-300mg is the studied dose. It isn't. The reason is that DHM is expensive raw material, and 100-300mg is the dose that lets a manufacturer put DHM on the label without making the cost-per-bottle untenable. The label number reflects an economic constraint, not a pharmacological one.
What the Studies Actually Use
The Shen 2012 paper from UCLA, which is the foundational DHM study most products reference, used effective doses of 1 to 10 mg/kg in rats1. After surface-area conversion to human-equivalent doses (the standard rat-to-human adjustment factor is roughly 6.2x lower), that maps to about 110 to 160 mg of DHM in circulation in a typical adult. That number is the effective floor in animal data.
Then the bioavailability problem hits. A pharmacokinetic review put DHM's absolute oral bioavailability at around 4 percent in standard formulations, with the limiting factors being poor solubility and chemical instability in the gut2. To deliver 110-160 mg to circulation, you would need to load roughly 25x that as input dose -- so 2,750 to 4,000mg of raw DHM in the worst case, or roughly 1,000-1,500mg in better-formulated cases, the published reviews suggest.
Acts by promoting aldehyde and alcohol metabolism of foods.†
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
This is the gap that 100-300mg labels live inside. They are below the floor of the floor.
Why the Industry Lands There Anyway
DHM raw material has historically been priced in the range that makes a 1,500mg-per-serving dose meaningfully expensive to manufacture. Most retail supplement brands run on margin structures that cannot accommodate that ingredient cost without pushing the consumer price beyond what the category supports. The economic answer is to put a small dose of DHM in the formula, list it on the label, and pad the rest of the serving with cheaper supporting ingredients.
The clinical-dose mismatch is not unique to DHM. The 2005 systematic review of hangover-prevention RCTs noted that across the category, supplement-format doses are routinely lower than the doses used in the underlying clinical trials they reference3. DHM is a particularly bad case because the bioavailability haircut is so large.
Triggers the liver to produce more of the aldehyde- and alcohol-metabolizing enzymes (ADH and ALDH) and boosts their efficiency in breaking down aldehydes and alcohols in foods as well as their by-products.†
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
A 2023 study of DHM and ethanol-induced lipid accumulation used DHM at the equivalent of hundreds of milligrams per kilogram in mice to get a clean signal on hepatic outcomes4. That is far above what any retail label claims. Studies use these doses because that is what produces measurable effects on the enzyme system and downstream liver markers.
What 1,500mg Actually Costs to Deliver
A 1,500mg dose of DHM per serving requires substantially more raw material per bottle than a 200mg dose. There are also formulation challenges: getting 1,500mg of a poorly-soluble flavonoid into a serving without splitting it across many capsules requires either a particle-size optimization or a delivery-vehicle approach (lipid carriers, fulvic acid, sustained-release formats) that adds further cost5.
Helps you feel fresh.†
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
We made the call to absorb that cost in the formula because the underlying math doesn't work otherwise. A 200mg DHM serving is not a 7x weaker version of a 1,500mg DHM serving. It is structurally below the threshold where the underlying enzyme effect can occur. Below that threshold, what you are buying is the label, not the function.
What I Saw on the Shelf
When I ran the early version of the H180 testing protocol, I bought 11 different DHM-containing products off retail shelves and read every label. None of them disclosed a per-serving DHM dose above 600mg. Most were in teh 150-300mg range. A few hid the actual DHM dose inside a "proprietary blend" that combined DHM with other flavonoids, which made the actual milligrams undisclosed. (this practice is especially frustrating because it makes apples-to-apples dose comparisons impossible across brands.)
For the published math behind why 1,500mg is the dose we settled on, see DHM Dose-Response. For why the bioavailability problem itself is solvable rather than fundamental, see DHM Bioavailability.