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Brussels Sprout Powder

Brassica oleracea var. gemmifera
Evidence Level
Limited
2 Clinical Trials
5 Documented Benefits
2/5 Evidence Score

Brussels sprout powder is produced from freeze-dried or low-temperature-dried Brussels sprouts and concentrates the cruciferous vegetable's signature phytochemicals, including glucosinolates (notably glucobrassicin and glucoraphanin), kaempferol, and vitamin C. When the powder is consumed, plant myrosinase and gut microbiota convert glucosinolates into bioactive isothiocyanates and indoles such as indole-3-carbinol (I3C) and 3,3′-diindolylmethane (DIM), which activate Nrf2-driven detoxification enzymes and modulate estrogen metabolism. Brussels sprout powder is used as a whole-food approach to supply cruciferous phytochemicals in formulations targeting antioxidant defense, detoxification, and hormonal balance.

Studied Dose Cruciferous interventions vary widely; I3C has been studied at 300–400 mg/day. Brussels sprout powder is typically used at 1–5 g/day in formulations, equivalent to a fraction of one daily cup of fresh sprouts.
Active Compound Glucosinolates (glucobrassicin, glucoraphanin, sinigrin) yielding indole-3-carbinol, 3,3′-diindolylmethane, and sulforaphane; plus kaempferol, quercetin glycosides, and vitamin C.

Benefits

Supports Phase II detoxification

Cruciferous isothiocyanates upregulate hepatic Phase II enzymes such as glutathione S-transferases, helping the body conjugate and clear environmental compounds and metabolic byproducts.

Supported by Trial 2

Promotes balanced estrogen metabolism

Indole-3-carbinol and DIM derived from glucobrassicin help shift estrogen metabolism toward the more favorable 2-hydroxyestrone pathway, supporting hormonal balance in women.

Supported by Trial 1

Provides antioxidant nutrients

Supplies kaempferol, vitamin C, and other antioxidant compounds that help protect cells from everyday oxidative stress and support immune readiness.

Supports cardiovascular wellness

Higher cruciferous-vegetable intake is associated with healthier vascular markers, and Brussels sprout powder offers a concentrated way to contribute to that intake pattern.

Supported by Trial 2, Trial 1

Convenient whole-food cruciferous source

Allows formulators and individuals to add cruciferous phytochemicals without preparing fresh sprouts, useful for greens powders and detox-support stacks.

Supported by Trial 2

Mechanism of action

1

Nrf2 pathway activation

Sulforaphane and related isothiocyanates modify cysteine residues on Keap1, releasing Nrf2 to translocate to the nucleus and drive transcription of antioxidant-response-element genes.

2

I3C/DIM estrogen modulation

I3C condenses to DIM in the stomach; both compounds upregulate CYP1A1-mediated 2-hydroxylation of estradiol, favoring 2-hydroxyestrone over 16α-hydroxyestrone.

3

Glutathione conjugation support

Isothiocyanates serve as substrates for glutathione conjugation and induce expression of GST enzymes, helping the body neutralize electrophilic compounds.

4

Kaempferol anti-inflammatory signaling

Kaempferol modulates NF-κB and MAPK pathways and inhibits select pro-inflammatory enzymes, supporting a balanced inflammatory tone.

Clinical trials

1
Indole-3-carbinol and estrogen metabolism

Human intervention studies with oral I3C

Healthy men and women

Oral I3C administration significantly increased urinary excretion of C-2 estrogens (such as 2-hydroxyestrone) while reducing concentrations of estradiol and estrone, supporting a shift in estrogen metabolism toward the 2-hydroxylation pathway with cruciferous-derived I3C intake.

2
Sulforaphane from broccoli sprouts and detoxification

Randomized, placebo-controlled trial of broccoli sprout beverage delivering glucoraphanin and sulforaphane for 12 weeks

n=291 adults in air-polluted region of China

Daily broccoli sprout beverage produced rapid and sustained increases in urinary excretion of benzene (~61%) and acrolein (~23%) conjugates, indicating activation of detoxification pathways relevant to all glucoraphanin-containing crucifers, including Brussels sprouts.

Side effects and drug interactions

Common Potential side effects

Increased intestinal gas and bloating from fermentable fiber and sulfur compounds.
May contribute to a strong urinary or stool odor from sulfur metabolism.
Goitrogenic compounds may modestly affect thyroid function at very high regular intakes.
Vitamin K content can be relevant for those on vitamin-K-sensitive regimens.
Possible allergic reaction in individuals sensitive to brassica vegetables.

Important Drug interactions

Warfarin and other vitamin-K-sensitive anticoagulants: maintain consistent intake.
Levothyroxine: large goitrogen loads may modestly affect thyroid hormone needs.
CYP1A2 substrates (e.g., theophylline, clozapine): I3C/DIM may induce CYP1A2 and alter clearance.
Tamoxifen and hormone therapies: theoretical interaction via estrogen metabolism shifts.

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Frequently asked questions about Brussels Sprout Powder

What is the recommended dosage of Brussels Sprout Powder?

The clinically studied dose for Brussels Sprout Powder is Cruciferous interventions vary widely; I3C has been studied at 300–400 mg/day. Brussels sprout powder is typically used at 1–5 g/day in formulations, equivalent to a fraction of one daily cup of fresh sprouts.. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Brussels Sprout Powder used for?

Brussels Sprout Powder is studied for supports phase ii detoxification, promotes balanced estrogen metabolism, provides antioxidant nutrients. Cruciferous isothiocyanates upregulate hepatic Phase II enzymes such as glutathione S-transferases, helping the body conjugate and clear environmental compounds and metabolic byproducts.

Are there side effects from taking Brussels Sprout Powder?

Reported potential side effects may include: Increased intestinal gas and bloating from fermentable fiber and sulfur compounds. May contribute to a strong urinary or stool odor from sulfur metabolism. Always consult a healthcare provider before starting any new supplement, especially if you have underlying conditions or take medications.

Does Brussels Sprout Powder interact with medications?

Known drug interactions may include: Warfarin and other vitamin-K-sensitive anticoagulants: maintain consistent intake. Levothyroxine: large goitrogen loads may modestly affect thyroid hormone needs. Consult a pharmacist or healthcare provider if you take prescription medications.

Is Brussels Sprout Powder good for antioxidant?

Yes, Brussels Sprout Powder is researched for Antioxidant support. Supplies kaempferol, vitamin C, and other antioxidant compounds that help protect cells from everyday oxidative stress and support immune readiness.

References(2 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Michnovicz JJ, Adlercreutz H, Bradlow HL. Changes in levels of urinary estrogen metabolites after oral indole-3-carbinol treatment in humans. J Natl Cancer Inst. 1997;89(10):718-23. doi: 10.1093/jnci/89.10.718.PubMedUsed to support: Human study showing oral indole-3-carbinol significantly increased urinary excretion of 2-hydroxylated estrogens and reduced concentrations of estradiol and estrone, supporting a cruciferous-driven shift in estrogen metabolism.
  2. Egner PA, Chen JG, Zarth AT, Ng DK, Wang JB, Kensler KH, Jacobson LP, Muñoz A, Johnson JL, Groopman JD, Fahey JD, Talalay P, Zhu J, Chen TY, Qian GS, Carmella SG, Hecht SS, Kensler TW. Rapid and Sustainable Detoxication of Airborne Pollutants by Broccoli Sprout Beverage: Results of a Randomized Clinical Trial in China. Cancer Prev Res (Phila). 2014;7(8):813-823. doi: 10.1158/1940-6207.CAPR-14-0103.PubMedUsed to support: 12-week RCT showing that a glucoraphanin/sulforaphane-rich crucifer beverage produced rapid and sustained increases in urinary detoxification metabolites of benzene and acrolein, supporting cruciferous phytochemicals (also present in Brussels sprouts) as inducers of Phase II detoxification.