Best 6 Sulforaphane Supplements of 2026

Broccoli sprouts sound simple enough — until you realize how much of their promised benefit depends on freshness, chewing them raw, and eating far more than most people ever will.

Sulforaphane, the compound responsible for those benefits, breaks down quickly and is easily destroyed by cooking. That inconsistency is exactly why so many people turn to a supplement instead of relying on diet alone.

This guide breaks down what actually separates one sulforaphane supplement from another — dose, form, and whether the product includes the enzyme needed to activate it — so you can pick the one that matches your goals.

Our Top Picks for Sulforaphane Supplements

Best Overall: SMNutrition Sulforaphane 50mg (60 Count) — Doctor-formulated 50mg dose with both glucoraphanin and myrosinase for full conversion.

Best Value: Nutricost Sulforaphane Glucosinolate (120 Capsules) — GMP-compliant 50mg broccoli seed extract at under $0.16 per serving.

Best for Healthy Aging: Double Wood Sulforaphane Supplement (120 Capsules) — Third-party tested, tiny capsules, two-month supply for consistent daily use.

Best Researched Formula: Nutramax Avmacol Extra Strength (75 Tablets) — NSF-certified formula used in more human clinical trials than any competing brand.

Best for Liver Health: Jarrow Formulas BroccoMax (120 Capsules) — Delayed-release 35mg SGS formula built specifically for liver support.

Best Stabilized Sulforaphane: BrocElite Mara Labs Plus (60 Capsules) — Pre-converted stabilized sulforaphane, glyphosate-residue-free and third-party verified.

Comparison Table

Rank	Product	Form	Price/Serving	Best For
1	SMNutrition Sulforaphane 50mg	Capsule	$1.67	Users who want the highest active dose with both conversion enzymes included
2	Nutricost Sulforaphane Glucosinolate	Capsule	$0.16	Long-term daily users on a tight supplement budget
3	Double Wood Sulforaphane Supplement	Capsule	$0.33	People who struggle swallowing large pills and want a simple daily habit
4	Nutramax Avmacol Extra Strength	Tablet	$0.88	Anyone who wants a brand with published human clinical research behind it
5	Jarrow Formulas BroccoMax	Capsule	$0.44	Adults specifically prioritizing liver support alongside antioxidant intake
6	BrocElite Mara Labs Plus	Capsule	$2.67	Users who want sulforaphane already converted, not just its precursors

1. SMNutrition Sulforaphane 50mg (60 Count) — Best Overall

Price: $49.95 (as of August 9, 2026)

Each serving delivers 50mg of activated sulforaphane through delayed-release microbeadlets, combining three separate broccoli extracts with both conversion components built in.

Key Specs

• Active ingredient + form: Activated Sulforaphane Complex (broccoli seed extract, broccoli sprout extract with myrosinase, additional sprout extract, mustard seed powder)
• Dose per serving: 50 mg activated sulforaphane (2 capsules)
• Certifications: Non-GMO, Gluten-Free (GFCO), GMP facility, vegan
• Third-party tested: Yes
• Servings per container: 30
• Price per serving: $1.67 (calculated manually, Price as of August 9, 2026)

Key Benefits

SMNutrition combines glucoraphanin and myrosinase in the same formula, so the body doesn’t have to rely on gut bacteria to complete sulforaphane conversion. Added BioPerine supports absorption, and the delayed-release microbeadlet delivery is designed to protect the compound through digestion rather than breaking down too early in the stomach.

Key Ingredients

• Broccoli Seed Extract (BroccoPure®, 260 mg): supplies glucoraphanin, the precursor form of sulforaphane.
• Broccoli Sprout Extract with Myrosinase (150 mg): provides the enzyme needed to convert glucoraphanin into active sulforaphane.
• Organic Yellow Mustard Seed Powder (50 mg): contains additional myrosinase activity as a backup conversion source.

Pros

• Highest active dose in this list at 50 mg per serving
• Includes myrosinase, so conversion doesn’t depend on diet or gut bacteria
• Vegan, allergen-free, and independently tested for potency

Cons

• Most expensive per serving among the capsule-based options ($1.67)
• A portion of reviewers describe a lingering broccoli aftertaste
• Some report mild stomach discomfort when taken without food

Best Suited For

People who want a single, complete sulforaphane formula without needing to pair it with raw cruciferous vegetables for conversion.

Usage Recommendations

Take 2 capsules daily with a meal. Most reviewers report needing several weeks of consistent use before noticing antioxidant or energy-related effects.

Customer Feedback

Reviewers consistently describe the capsules as easy to swallow with only a mild aftertaste, and many credit the formula for noticeable improvements in digestion, energy, and general antioxidant support. Several long-term users specifically mention pairing it with other supplements for hormone balance and note it as one of the cleaner-label options they’ve tried.

A recurring criticism is price — several buyers feel it’s justified by quality, while others say a cheaper alternative would perform similarly for their needs. A smaller group reported heartburn or stomach upset, generally resolved by taking the capsules with food.

Summary: SMNutrition earns its Best Overall badge by including both glucoraphanin and myrosinase at a clinically meaningful 50 mg dose, backed by consistent third-party testing.

2. Nutricost Sulforaphane Glucosinolate (120 Capsules) — Best Value

Price: $18.95 (as of August 9, 2026)

At roughly 16 cents per serving, Nutricost offers the lowest cost per dose of any product in this guide, using a single-ingredient broccoli seed extract standardized to 0.5% sulforaphane.

Key Specs

• Active ingredient + form: Broccoli Seed Extract (Brassica oleracea, 0.5% sulforaphane)
• Dose per serving: 50 mg broccoli seed extract (1 capsule)
• Certifications: Non-GMO, gluten-free, GMP-compliant facility
• Third-party tested: Yes
• Servings per container: 120
• Price per serving: $0.16 (calculated manually, Price as of August 9, 2026)

Key Benefits

Nutricost keeps the formula simple: one ingredient, one capsule, once daily. It’s a straightforward way to add a broccoli seed extract precursor to a routine without extra additives, though it’s worth noting this formula does not include myrosinase, so conversion to active sulforaphane depends on the body’s own gut bacteria or dietary myrosinase sources.

Key Ingredients

• Broccoli Seed Extract (Brassica oleracea, 0.5% Sulforaphane), 50 mg: the sole active ingredient, providing glucoraphanin content without an added conversion enzyme.

Pros

• Lowest price per serving in this comparison
• Simple once-daily capsule with no unnecessary fillers
• Manufactured under GMP standards and third-party tested

Cons

• No myrosinase included — conversion depends on gut bacteria or diet ⚠️ disclaimer: this is a lower-conversion formulation compared to products like SMNutrition or Avmacol that include the enzyme directly
• Some reviewers feel the dose is too modest for a therapeutic effect
• Fewer clinical claims backing this specific formulation

Best Suited For

Budget-conscious buyers who want a no-frills broccoli seed extract and are comfortable pairing it with raw cruciferous vegetables or mustard seed for better conversion.

Usage Recommendations

Take 1 capsule daily with water, ideally with a meal. Pairing with raw cruciferous vegetables can help support natural myrosinase-driven conversion.

Customer Feedback

Most reviewers describe the price as excellent for the quality received, with several noting it as a reliable, easy-to-swallow daily addition, including some who say a physician recommended it as part of a broader wellness plan.

A recurring critique focuses on the missing myrosinase enzyme, with a portion of reviewers describing the sulforaphane content as too minimal to be a dependable standalone source, particularly compared to formulas that include added conversion enzymes.

Summary: Nutricost is the clear budget pick — reliable manufacturing standards at the lowest price per serving, with the tradeoff of relying on dietary myrosinase for full conversion.

3. Double Wood Sulforaphane Supplement (120 Capsules) — Best for Healthy Aging

Price: $19.95 (as of August 9, 2026)

Double Wood delivers 20 mg of sulforaphane glucosinolate per serving in small, easy-to-swallow capsules, positioned as a two-month supply for consistent daily use.

Key Specs

• Active ingredient + form: Sulforaphane Glucosinolate (from broccoli seed extract)
• Dose per serving: 20 mg (2 capsules) ⚠️ lowest active dose among the capsule-based products in this guide
• Certifications: GMP Certified, Manufactured in the USA, Third-Party Tested
• Third-party tested: Yes
• Servings per container: 60
• Price per serving: $0.33 (calculated manually, Price as of August 9, 2026)

Key Benefits

Double Wood’s formula centers on a straightforward sulforaphane glucosinolate extract without added enzymes or fillers. It’s positioned around consistency rather than potency, with a lower dose than SMNutrition or Nutricost but a track record of strong customer ratings for quality and tolerability.

Key Ingredients

• Sulforaphane Glucosinolate (from broccoli seed extract), 20 mg: the sole active compound, providing a moderate daily precursor dose.

Pros

• Small, easy-to-swallow capsules with no reported aftertaste
• Strong customer rating (4.6/5) and Amazon’s Choice status
• Affordable at $0.33 per serving with a two-month supply per bottle

Cons

• Lower dose (20 mg) than several other options in this guide
• No myrosinase included, limiting conversion efficiency
• Mixed reviews specifically around joint pain relief — some notice no change

Best Suited For

People who prioritize a small, easy-to-swallow capsule and steady long-term use over maximizing dose.

Usage Recommendations

Take 2 capsules daily, with or without food. Pairing with raw cruciferous vegetables may help support conversion, since this formula does not include myrosinase.

Customer Feedback

Reviewers frequently highlight the small capsule size and lack of aftertaste, along with reports of improved energy and general antioxidant support. Several long-term users specifically mention noticeable liver detox support and describe the price as reasonable for the quality delivered.

A smaller group of reviewers reported no improvement in joint pain or inflammation, and a few noted mild side effects such as headaches. Since the formula lacks myrosinase, results may vary more than higher-dose, enzyme-included alternatives.

Summary: Double Wood earns its healthy-aging badge through consistency and tolerability rather than maximum dose — a dependable daily option at a moderate price.

4. Nutramax Avmacol Extra Strength (75 Tablets) — Best Researched Formula

Price: $65.99 (as of August 9, 2026)

Avmacol is the most-studied sulforaphane-producing supplement on the market, built around a patented glucoraphanin and myrosinase blend that has been used in multiple human clinical trials.

Key Specs

• Active ingredient + form: Proprietary Sulforaphane Glucosinolate & Myrosinase Blend (broccoli seed & sprout ERS92®, ≥35 mg glucoraphanin, plus moringa leaf, mustard seed, beta-glucan, maitake mushroom extract)
• Dose per serving: 1 tablet (480 mg proprietary blend)
• Certifications: NSF Contents Certified, gluten-free, vegetarian
• Third-party tested: Yes (NSF certified)
• Servings per container: 75
• Price per serving: $0.88 (calculated manually, Price as of August 9, 2026)

Key Benefits

Avmacol’s formula goes beyond a single-ingredient extract, layering moringa, beta-glucans, and maitake mushroom extract onto its core glucoraphanin-myrosinase blend. It’s the only product in this guide with NSF Contents Certification, and its research base includes more published human trials than any competing brand.

Key Ingredients

• Broccoli Seed & Sprout Extract (ERS92®), ≥35 mg glucoraphanin: the core precursor source, paired with an included myrosinase blend for conversion.
• Maitake Mushroom Extract (beta-glucan source): included to support general immune cell activity alongside the sulforaphane blend.
• Vitamin C (25 mg): added as a general antioxidant cofactor.

Pros

• Most clinically studied sulforaphane brand, used in multiple human trials
• Includes myrosinase, ensuring sulforaphane production rather than relying on diet
• NSF-certified for content accuracy

Cons

• Highest per-serving price among the tablet-based options ($0.88)
• Contains maltodextrin, which may concern users managing blood sugar
• Some reviewers describe the tablet taste and smell as unpleasant

Best Suited For

Users who specifically want a research-backed, third-party-certified formula and are less concerned about taste or price than about documented clinical use.

Usage Recommendations

Take 1 tablet daily, with or without food. Because the formula already includes myrosinase, no additional dietary pairing is needed for conversion.

Customer Feedback

Many reviewers report improved energy, mental clarity, and digestive regularity, with some specifically referencing health podcasts or physicians as their reason for trying the brand. Several describe it as a trusted, well-established option backed by real research rather than marketing claims alone.

Criticism centers on cost, which some reviewers describe as high for a daily supplement, and on the presence of maltodextrin as a filler. A portion of users also find the tablets harder to swallow than capsule-based alternatives.

Summary: Avmacol remains the gold-standard choice for anyone who wants published clinical research behind their sulforaphane supplement, even at a premium price.

5. Jarrow Formulas BroccoMax (120 Delayed-Release Capsules) — Best for Liver Health

Price: $26.54 (as of August 9, 2026)

BroccoMax delivers 35 mg of sulforaphane glucosinolate with myrosinase in delayed-release veggie capsules, specifically formulated to support liver health and cellular replication.

Key Specs

• Active ingredient + form: Sulforaphane Glucosinolate (SGS) from Broccoli Seed Extract, in a proprietary blend containing myrosinase enzyme, delayed-release
• Dose per serving: 35 mg (2 capsules)
• Certifications: Free of wheat, gluten, soy, dairy, egg, fish/shellfish, peanuts/tree nuts, sesame
• Third-party tested: Not stated on product label
• Servings per container: 60
• Price per serving: $0.44 (calculated manually, Price as of August 9, 2026)

Key Benefits

BroccoMax is positioned specifically around liver support, using delayed-release capsules to protect the formula through digestion. With over 2,000 reviews and a large customer base of repeat buyers, it has one of the longest track records of any product in this category.

Key Ingredients

• Sulforaphane Glucosinolate (SGS), 35 mg (from Broccoli Seed Extract with Myrosinase): provides both the precursor and the conversion enzyme in one delayed-release formula.

Pros

• Includes myrosinase for full conversion in a single formula
• Delayed-release capsule technology to protect potency through digestion
• Large, long-standing review base with strong average rating (4.5/5)

Cons

• Contains maltodextrin and rice-derived fillers some reviewers avoid
• Not explicitly labeled as third-party tested
• A portion of users report an unusual smell or mild stomach discomfort

Best Suited For

Adults specifically interested in liver-focused antioxidant support alongside general sulforaphane benefits.

Usage Recommendations

Take 2 delayed-release capsules daily with water, or as directed by a healthcare professional.

Customer Feedback

The majority of reviewers describe consistent quality and note improvements in energy, mood, and general well-being, with several long-term users — including some managing chronic health conditions — describing it as a staple in their daily routine.

A subset of reviewers report side effects such as headaches, stomach discomfort, or an unusual odor from the capsules, and a few specifically mention disliking the addition of maltodextrin to the formula.

Summary: BroccoMax stands out for pairing myrosinase-included conversion with a specific liver-health focus and one of the largest, most established review bases in this category.

6. BrocElite Mara Labs Plus (60 Capsules) — Best Stabilized Sulforaphane

Price: $79.95 (as of August 9, 2026)

Unlike most products in this guide, BrocElite supplies pre-converted, stabilized sulforaphane rather than the glucoraphanin precursor — meaning the body doesn’t need myrosinase or gut bacteria to activate it.

Key Specs

• Active ingredient + form: Stabilized Sulforaphane (10 mg) plus Broccoli Seed Complex (650 mg, including PEITC, Iberin, BITC, AITC)
• Dose per serving: 10 mg stabilized sulforaphane (2 capsules) ⚠️ lowest absolute mg dose in this guide, though the compound is already in its active, converted form rather than a precursor
• Certifications: Non-GMO, Gluten-Free, Vegan, No Fillers, No Contaminants, Glyphosate-Residue-Free, Third-Party Tested
• Third-party tested: Yes
• Servings per container: 30
• Price per serving: $2.67 (calculated manually, Price as of August 9, 2026)

Key Benefits

BrocElite’s core differentiator is delivering already-stabilized sulforaphane instead of glucoraphanin, removing the conversion step entirely. It pairs this with a broader broccoli seed complex containing several related isothiocyanates, positioned as a comprehensive antioxidant formula rather than a single-compound extract.

Key Ingredients

• Stabilized Sulforaphane, 10 mg: delivered in its already-active form, bypassing the need for myrosinase or gut conversion.
• Broccoli Seed Complex, 650 mg (PEITC, Iberin, BITC, AITC): a blend of related isothiocyanate compounds included alongside sulforaphane.

Pros

• Sulforaphane is pre-converted, removing reliance on myrosinase or gut bacteria
• Glyphosate-residue-free and free from common allergens and fillers
• Frequently praised for energy and sleep-related benefits

Cons

• Most expensive product in this guide at $2.67 per serving
• Lowest absolute sulforaphane content in mg despite the premium price
• A notable share of reviewers report digestive discomfort, including gas and stomach pain

Best Suited For

Users willing to pay a premium for pre-converted, stabilized sulforaphane rather than a precursor formula that depends on enzyme activity.

Usage Recommendations

Take 1 capsule in the morning and 1 in the evening, with food or on an empty stomach, per manufacturer guidance.

Customer Feedback

Many reviewers describe noticeable improvements in energy and sleep quality, with several specifically praising the anti-inflammatory effects and calling out the clean, glyphosate-free sourcing as a reason for choosing this brand over cheaper alternatives.

A recurring complaint is price relative to results, with a meaningful share of reviewers finding it too expensive for the benefit received. Digestive side effects, including gas and stomach discomfort, are also reported more frequently than with other products in this guide.

Summary: BrocElite’s appeal is chemistry, not dose — it delivers sulforaphane already converted, at a premium price that some users find worth paying and others don’t.

Evidence-Based Ingredients

Glucoraphanin

Glucoraphanin is the natural precursor compound found in broccoli seeds and sprouts. Traditional dietary use of cruciferous vegetables has long been associated with general health benefits, and mechanistic studies show glucoraphanin converts to sulforaphane when it contacts the enzyme myrosinase. Human clinical trials on standardized glucoraphanin-myrosinase combinations, particularly around Avmacol’s formulation, provide some of the stronger evidence in this category compared to precursor-only products.

Myrosinase

Myrosinase is the enzyme responsible for converting glucoraphanin into active sulforaphane, and it is largely destroyed by cooking. Products that include myrosinase directly in the formula rely on well-established mechanistic and enzymatic research, while products lacking it depend on the more variable, less-studied pathway of gut bacteria conversion.

Stabilized Sulforaphane

Rather than supplying a precursor, some products deliver sulforaphane in an already-converted, stabilized form. This approach is newer and less extensively studied in large human trials compared to glucoraphanin-myrosinase combinations, though early research on isolated sulforaphane supports its role in antioxidant and Nrf2-pathway activity.

The ingredients in our top picks have a mix of traditional dietary use, mechanistic enzyme research, and — for select formulations — emerging clinical trial support. They are not treatments for any disease and should not replace medical care.

What Are Sulforaphane Supplements?

Sulforaphane is a natural compound formed when glucoraphanin, found in broccoli and related cruciferous vegetables, reacts with the enzyme myrosinase.

This reaction typically happens when the vegetable is chopped or chewed. Cooking destroys most of the myrosinase, which is why raw sprouts contain far more usable sulforaphane than cooked broccoli.

Sulforaphane supplements solve this inconsistency by providing either a stabilized, already-converted form of sulforaphane, or a concentrated glucoraphanin extract paired with added myrosinase for reliable conversion in the body.

Common Signs You May Need Sulforaphane Support

• Diet consistently low in cruciferous vegetables (broccoli, kale, cabbage, Brussels sprouts)
• Interest in additional antioxidant or cellular-defense support alongside a healthy diet
• Concern about liver detoxification support
• Difficulty preparing or eating raw broccoli sprouts regularly
• Interest in Nrf2-pathway-related research on aging and oxidative stress
• General immune support goals alongside an existing wellness routine

Key Ingredients to Look For

• Glucoraphanin + Myrosinase combined: ensures the body can actually convert the precursor into active sulforaphane, rather than depending on gut bacteria alone.
• Standardized sulforaphane or SGS percentage: look for a labeled mg amount rather than a proprietary blend with no specific dose disclosed.
• Stabilized/pre-converted sulforaphane: bypasses the conversion step entirely, though typically at a higher price per mg.
• Third-party testing certification: verifies the labeled potency matches what’s actually in the capsule.
• Minimal fillers: formulas without maltodextrin or unnecessary binders tend to draw fewer digestive complaints in reviews.

How to Choose

• Form and dose: decide whether you want a precursor-based formula (glucoraphanin) or pre-converted stabilized sulforaphane, and compare the actual mg dose, not just serving size.
• Myrosinase inclusion: if a formula doesn’t include myrosinase, plan to pair it with raw cruciferous vegetables or mustard seed powder for better conversion.
• Third-party testing: prioritize brands that verify potency independently rather than relying on label claims alone.
• Certifications: Non-GMO, gluten-free, and allergen-free labeling matters more if you have specific dietary restrictions.
• Price per serving: cost varies from $0.16 to $2.67 per serving in this guide — decide whether you’re paying for dose, conversion technology, or brand research backing.

Who May Benefit

• Adults who don’t regularly eat raw cruciferous vegetables or broccoli sprouts
• People specifically interested in liver-support or detoxification-focused antioxidant intake
• Those following research on Nrf2 activation and cellular aging
• Anyone wanting a standardized, consistent daily dose rather than variable dietary intake

Safety and Side Effects

Sulforaphane supplements are generally well tolerated, though mild digestive discomfort — including gas, bloating, or stomach upset — is the most commonly reported side effect across the products in this guide, particularly when taken without food.

Products containing added ingredients like maltodextrin or mustard seed powder may cause more noticeable digestive reactions in sensitive individuals. People with thyroid conditions, those on blood-thinning medication, or anyone pregnant or nursing should consult a healthcare provider before starting a cruciferous-compound supplement, since high intake of some isothiocyanates can interact with thyroid function.

What Results Can You Expect?

Most reviewers across all six products describe needing several weeks of consistent daily use before noticing antioxidant, digestive, or energy-related effects. This is not an immediate-effect supplement — benefits tied to cellular defense and detoxification pathways build gradually rather than appearing after a single dose.

Lifestyle Tips

• Pair a myrosinase-free formula with raw cruciferous vegetables or mustard seed powder to support conversion.
• Take capsules with a meal if you experience stomach discomfort on an empty stomach.
• Stay consistent — most reported benefits appear after several weeks, not days.
• Stay hydrated, since higher-dose antioxidant supplements are sometimes better tolerated with adequate water intake.
• Rotate in raw broccoli sprouts as a food source alongside supplementation rather than relying on either alone.

FAQs about Sulforaphane Supplements

Final Thoughts

For most people, SMNutrition Sulforaphane 50mg is the strongest overall pick — it’s the only product combining a clinically meaningful 50mg dose with both glucoraphanin and myrosinase in one formula.

If research credibility matters more than dose or price, Nutramax Avmacol is the better fit, backed by more published human trials than any other brand in this guide.

Anyone on blood thinners, thyroid medication, pregnant, or nursing should talk to a doctor before adding a cruciferous-compound supplement rather than starting one on their own.

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