Cross-referencing clinical data
Brussels Sprout
- Category
- Herb
Nothing to show here, and the reason why.
A pairing appears on this page only when a trial gave both ingredients together and measured the result. Brussels Sprout has none that clears that bar.
No pairing for Brussels Sprout has cleared review yet.
Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.
No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
20 pairings are live across the library today. Checked 20 July 2026.
Plays well withEstablished knowledge, not a trial
No study gave these as a pair, so they are not in the card above. But the reason they belong together is settled biochemistry, not a guess, so it is worth knowing.
Brussels Sprout + Diindolylmethane (DIM)DIM is the acid-condensation product formed in the stomach from indole-3-carbinol, which itself comes from the glucobrassicin in Brussels sprouts.
Glucobrassicin in the sprout is hydrolysed by myrosinase to indole-3-carbinol, and stomach acid then condenses that into DIM and related oligomers. Taking DIM directly bypasses the plant enzyme step and gives a far more predictable dose. Eating the vegetable delivers a mixture of indoles rather than DIM alone, so the two are not equivalent inputs.
Brussels Sprout + SulforaphaneBoth come from glucosinolate hydrolysis in Brassica vegetables, sulforaphane from glucoraphanin and the indoles from glucobrassicin, and both are described as inducers of phase II conjugating enzymes.
Sulforaphane and the indole products of Brussels sprouts act on overlapping detoxification enzyme induction, though sulforaphane works mainly through Nrf2 and the indoles act more on aryl hydrocarbon receptor signalling. Brussels sprouts contain both glucosinolate classes, so eating them delivers a mixture rather than either compound alone. Enzyme induction is a measured biochemical response and not by itself a health outcome.
Brussels Sprout + Broccoli Sprout ExtractSame botanical family and same glucosinolate chemistry, with broccoli sprouts skewed toward glucoraphanin and Brussels sprouts toward glucobrassicin.
The two materials load different ends of the same glucosinolate spectrum, so combining them broadens the mix of hydrolysis products rather than raising any one of them. Both depend on myrosinase or gut bacteria to release the active isothiocyanates and indoles. Cooking either one destroys plant myrosinase and shifts the conversion onto colonic bacteria, which is less efficient.
Brussels Sprout + ProbioticsWhen plant myrosinase has been destroyed by cooking, gut bacteria carry out glucosinolate hydrolysis instead, and the extent of conversion varies with the microbiota present.
Several gut bacterial species possess myrosinase-like activity and can release isothiocyanates from intact glucosinolates in the colon. That is why people vary widely in how much active compound they generate from the same cooked serving. Whether adding a commercial probiotic changes that conversion in a person has not been well established, so this is mechanism rather than a demonstrated result.
Brussels Sprout + IodineThiocyanate and goitrin, formed from glucosinolate breakdown, compete with iodide at the sodium-iodide symporter.
Thiocyanate is a competitive inhibitor of iodide uptake into the thyroid gland, and it is a known breakdown product of certain glucosinolates in Brassica vegetables. The competition matters most when iodine intake is already low; with adequate iodine, ordinary culinary amounts of cruciferous vegetables have not been shown to shift thyroid function. Anyone taking a concentrated cruciferous extract at high daily doses should keep iodine intake adequate rather than assume the interaction is irrelevant.
Brussels Sprout + Vitamin K1Brussels sprouts are among the densest common dietary sources of phylloquinone.
A serving of Brussels sprouts contributes a substantial amount of vitamin K1 on its own, so adding a K1 supplement stacks on top of an already high dietary input. For most people that is unremarkable, since K1 has a wide intake range. It matters for anyone whose medication dosing was set against a stable vitamin K intake, because the issue is consistency rather than the absolute amount.
Brussels Sprout + Vitamin CAscorbate strongly increases absorption of non-heme iron from plant foods eaten in the same meal.
Brussels sprouts supply non-heme iron, which is absorbed far less efficiently than heme iron and is sensitive to what else is in the meal. Vitamin C reduces ferric iron to the ferrous form and holds it soluble, which raises uptake. Conveniently, the vegetable already carries a meaningful amount of ascorbate itself, though cooking degrades a large share of it.
Brussels Sprout + Calcium D-GlucarateBoth are discussed in the context of phase II glucuronidation and the enterohepatic recycling of conjugated compounds.
Cruciferous indoles are described as inducers of phase II conjugating enzymes, while calcium D-glucarate is proposed to act on beta-glucuronidase in the gut and so on how much conjugated material gets deconjugated and reabsorbed. The two ideas touch the same pathway from opposite ends. This is mechanistic reasoning; the combination has not been tested in a controlled human study.
Brussels Sprout + SeleniumBrassica plants take up selenium from soil and incorporate it into selenium analogues of their sulfur compounds, so the two nutrients travel together in this crop.
Sulfur and selenium follow overlapping uptake and assimilation routes in Brassica species, which is why selenium-enriched cruciferous vegetables exist as a research material. The selenium content of ordinary market sprouts depends heavily on the soil they were grown in. Anyone already taking a selenium supplement should count the vegetable as a variable rather than a fixed contributor.
Brussels Sprout + Digestive EnzymesBrussels sprouts contain raffinose-family oligosaccharides that human enzymes cannot hydrolyse, which is the reason for the familiar gas.
Raffinose and stachyose pass undigested to the colon where bacteria ferment them, producing the gas that cruciferous vegetables are known for. Alpha-galactosidase preparations hydrolyse those oligosaccharides in the upper gut before fermentation happens. This addresses comfort during digestion and has nothing to do with the glucosinolate chemistry the vegetable is usually taken for.
Who should be cautious
Nothing specific on file for Brussels Sprout. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.The forms it comes in.
Whole Brussels sprouts, raw or lightly cookedIntact glucosinolates with plant myrosinase still active if not overcookedFits Ordinary dietary intake, where fibre, vitamin C and vitamin K come along with the glucosinolatesTrade-off Actual delivered glucosinolate content swings with cultivar, growing conditions and above all cooking method
Brussels sprout powderWhole vegetable dried at low temperature, which can preserve part of the myrosinase activityFits Capsules and smoothie powders where whole-food composition is the pointTrade-off Concentration is modest, so matching a real serving takes a large powder dose, and myrosinase survival varies by processor
Brussels sprout extract, glucosinolate standardisedSolvent extract assayed to a stated glucosinolate percentageFits Situations where a defined and repeatable glucosinolate dose is wantedTrade-off Extraction usually inactivates myrosinase, so conversion to active indoles then depends on gut bacteria and varies between people
Glucosinolate extract plus active myrosinase sourceGlucosinolate extract combined with a mustard-seed or sprout-derived source of active enzymeFits Formulations aiming to make conversion less dependent on the individual microbiotaTrade-off The enzyme is heat and moisture sensitive, so storage conditions and stomach acid timing both affect whether it works as intendedActive and formulation aid
What the strongest studies found
The essence, in one line each.
- In human volunteers given a microdose of benzo[a]pyrene, dietary supplementation with either diindolylmethane or Brussels sprouts altered the measured toxicokinetics of the tracer compound.Open-label trial. Vermillion Maier ML et al., 2023 (Toxicology and Applied Pharmacology). PMID 36642108 ↗
These are the studies our verdict leans on, chosen from the 1 we read for Brussels Sprout. The full linked list is below.
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.
