Sproutly Sulforaphane Review: Why Customers Rate It the Best Broccoli Sprout Supplement

Sproutly is a trading name of NH Resource Group LLC, a New York limited liability company named in the store's refund, shipping and terms pages^4,5,6. Support runs through one address, support@sproutly.store⁴. There is one product, sold direct and online only. A Sproutly-named listing also exists on Amazon; whether it is authorised, and who the seller is, we could not confirm: insufficient data. The direct site is the only channel this page can vouch for.

Two things in the terms of service are better known before a purchase than after: a binding arbitration agreement and a class-action waiver, last updated March 2026⁶. Common for a direct-to-consumer store, and still a real limit on your options.

Our marketing has called our manufacturing "FDA-registered". That is narrower than it sounds. In the agency's own words, registration "does not denote approval of the establishment"; the FDA does not approve dietary supplements before they are marketed, and it neither issues nor recognises a certificate of registration or product status⁷. Registration is a traceability requirement — what "FDA-registered" means is on the FDA's own page. Good manufacturing practice is separately federal law under 21 CFR Part 111, enforced by inspection, and the FDA issues no cGMP certificate at all⁸; any GMP certificate you are shown came from a private auditor. Which auditor, if any, certified our manufacturer is not documented here: insufficient data.

Also gone from this page: every customer-count figure. We published several, they disagree, and none traces to a record we can show you.

In one line: Sproutly is one supplement sold direct by NH Resource Group LLC, a New York LLC whose terms include binding arbitration and a class-action waiver, and whose "FDA-registered" manufacturing is a registration fact, not an FDA approval or endorsement^4,6,7.

A serving is two capsules. The resealable pouch holds 60 capsules — 30 servings, a 30-day supply³. Amounts below are read off the photographed Supplement Facts panel, which governs wherever our marketing disagrees with it.

Now the correction. The panel says "up to 30 mg sulforaphane per serving". This page has said "30 mg per capsule" and called it a clinical dose. Both halves were wrong. A serving is two capsules, so a per-capsule figure is half the panel's number; and "up to" marks a ceiling for what the raw material could yield under ideal conversion, not an amount measured in anyone's bloodstream^14,3. Those are two different kinds of quantity.

Mechanism sits behind two links on purpose: why the enzyme is the part that matters, and what sulforaphane actually is.

In one line: one serving of Sproutly is two capsules holding 700 mg broccoli seed extract at 13% glucoraphanin, 200 mg broccoli sprout extract with active myrosinase, 100 mg mustard seed extract and 50 mg vitamin C, and the panel's "up to 30 mg sulforaphane per serving" is a ceiling for the serving, not a measured amount^3,14.

Sproutly's published review figures do not agree with each other. Four were read live on sproutly.store on 2 September 2026: "27,000+ customers, 4.7 stars" in this article's title and meta description; "Excellent 4.8 · 1319 reviews" and "Rated 4.8/5 by 1,319+ Happy Customers" on the product page; "Excellent 4.7/5" inside a block whose internal name references Trustpilot; and "over 10,000 people" with a "4.8/5 rating from verified buyers" in the product FAQ². Two more — "Rated 4.8/5 based on +10,839 Total Ratings" and "2,500+ Verified Reviews!" — come from a repo capture of the site logged 2026-08-24, not from that live read, and have not been re-confirmed since². Four review counts, three star ratings, two customer counts, one domain.

Three specifics matter more than the arithmetic. The 1,319 pair is a fixed string in the theme, not live widget output — it does not move when reviews move². This article's structured data carried a review count of 27,000 and a rating of 4.7, with a review attributed to "Verified Customer", hand-written rather than generated². And the store runs Judge.me but has no public all-reviews page: /pages/reviews returns 404, checked 2 September 2026².

One number can be verified without us. On 2 September 2026, our Trustpilot profile showed a TrustScore of 3.4 out of 5 from 43 reviews — 51% five-star, 7% four-star, 5% three-star, 5% two-star, 32% one-star. The profile is claimed, and Trustpilot records that we reply to 93% of negative reviews, typically within a week¹. That is materially lower than anything we have published about ourselves, and it is the one to weight, because we did not compute it. On a 43-review base a few reviews move the first decimal, so treat it as accurate on its date and read the current one.

The one-star reviews share a theme, and it is not the capsule: subscription auto-renewal the buyer says they did not knowingly agree to, then difficulty stopping it¹. We are not reproducing those reviewers' words. The link above goes to the unfiltered profile.

The standard applied here is the FTC's Trade Regulation Rule on the Use of Consumer Reviews and Testimonials, 16 CFR Part 465, effective 21 October 2024, which prohibits fabricated reviews, undisclosed insider reviews, suppression of negative reviews, and misrepresenting a site you control as an independent reviewer of your own products¹⁵. This is our page about our product, and the line at the top says so.

Three customer quotes appear on this page, and only three:

"Great product. Sulforaphane is a must have supplement paired with the mustard seed extract for increased absorption. You don't always see that combination." — a Trustpilot reviewer, five stars, May 2026

"I'm on Week 8!! I started noticing a change at Week 2. Very subtle." — a customer on Facebook

"I have been taking Sproutly for a few weeks now and in the last few days I can feel changes. So hopefully this continues." — a Trustpilot reviewer, five stars, May 2026

The last two are hedged and unresolved, which is why they are here — and the closest thing to an honest answer on timing, since no trial has measured it¹⁶.

In one line: sproutly.store publishes at least six customer-count and rating figures that trace to no review platform², and the only independently verifiable rating for Sproutly is a Trustpilot score of 3.4 out of 5 from 43 reviews, read 2 September 2026 — a base small enough that a handful of new reviews moves it¹.

The evidence for sulforaphane is real, narrow, and smaller than "science-backed" implies. Where a controlled human trial exists, the table names it; where none exists, the row says so instead of substituting a mechanism.

The first row is the strongest, and the one angle with a large randomised trial behind it is written up separately. Note what it establishes: the effect appeared only at the full dose. A product that converts poorly is not a gentler version of the studied intake — it may not reach it at all.

Everything a supplement may say about the body is what the FDA calls a structure/function claim: supporting normal function, never a disease. FDA's own explanation sets out the rule and the disclaimer that travels with it²². That disclaimer appears once, in full, at the foot of the bottom line below.

In one line: the strongest human evidence behind Sproutly's ingredient is a 170-person randomised trial in which only the full dose moved a detoxification biomarker¹⁷, the conversion step is well replicated⁹, and for reflux, LPR, SIBO and gut-lining conditions no direct human trial exists — the reasoning does, the result does not.

Sproutly's 90-day guarantee is narrower than every marketing surface on sproutly.store suggests. Here is what the refund policy in full says, as of 2 September 2026⁴.

Covered: 90 days from confirmed delivery, on a first order only, with no return required — nothing has to be shipped back.

Excluded: subsequent purchases, subscription renewals, replacements and promotional orders. The guarantee is usable once per customer, per household, per payment method. Shipping, handling and processing fees are not refundable. Refunds are not automatic — the policy says they are reviewed case by case. And initiating a chargeback immediately voids eligibility ⁴.

Our contact page states it differently: "take it daily for 90 days, and if nothing has changed, please email us and we'll refund you in full" ²³. That omits the first-order limit, the non-refundable fees and the case-by-case review. The refund policy governs, and the contact page is the wording that needs correcting.

In one line: Sproutly's 90-day guarantee covers a first order only, once per customer, household and payment method, requires no return, excludes shipping and handling fees, is reviewed case by case rather than granted automatically, and is voided by a chargeback⁴.

Subscription auto-renewal is the single recurring theme in this brand's negative reviews, and no Sproutly page has addressed it before this one. On Trustpilot the substance of a one-star review is usually not the capsule; it is a buyer saying they were enrolled in a recurring charge they did not knowingly agree to, then struggled to stop it¹. A complaint that repeats is a design problem, not a customer problem.

What we can state from documents we hold: subscriptions are managed at members.sproutly.store, with login details emailed roughly 24 hours after an order²³. Cancelling runs through that portal or through support@sproutly.store^4,23. If an unwanted shipment has already gone out, email support first — a chargeback immediately voids refund eligibility ⁴, so a bank dispute closes the faster route rather than opening one.

What we will not describe, because we hold no verified specification for it: which purchase paths enrol a customer in a subscription, at what point in checkout that is disclosed, and on what cycle the renewal falls. Insufficient data. Writing a confident billing flow we have not verified would repeat the failure this page exists to correct.

In one line: subscriptions are managed at members.sproutly.store with login details emailed about 24 hours after ordering, cancellation runs through that portal or support@sproutly.store, and support should be emailed before any chargeback because a chargeback voids refund eligibility — the enrolment trigger and renewal cycle are not documented in any source we hold^4,23.

Sproutly's shipping policy and its contact page do not say the same thing, and the two had never been reconciled in public. The policy is the commitment; the contact page is marketing copy.

Read that as a warning about our own marketing, not about our carriers. Someone told "4–7 days to your door" who then waits two weeks was given a bad expectation by us. Full detail is in the shipping policy.

Sproutly is a poor fit for several kinds of buyer, and naming them is the point of a disclosure page.

Anyone who wants a fast result. No trial has measured how long it takes to notice a subjective effect from sulforaphane¹⁶. The customers who say something useful describe weeks, and describe it as subtle.

Anyone taking medication, pregnant or breastfeeding. Speak to your clinician first, before ordering rather than after.

Anyone wanting a diagnosed condition treated. For the conditions people most often ask us about, no direct human trial of sulforaphane exists, and a supplement is not a treatment in any case. A clinician is the right spend.

Anyone who does not want a subscription. Our most common complaint is about recurring billing. If a one-time purchase is what you want, check that it is what you selected, and check your confirmation email.

In one line: Sproutly is a poor fit if you want a fast result — no trial has measured how long an effect takes to notice¹⁶ — if you take medication or are pregnant or breastfeeding and have not spoken to a clinician, if you want a diagnosed condition treated, or if you do not want a subscription; and we hold no safety or tolerability data for this product in either direction.

Fresh broccoli sprouts beat supplements on measured absorption, and that goes first because it is true. In a crossover where the same 12 people took both, fresh sprouts produced peak plasma sulforaphane seven-fold higher and 24-hour urinary excretion five-fold higher than a broccoli supplement¹⁹.

Two limits sit against it. Heat destroys the enzyme the whole thing depends on: raw broccoli produced 37% bioavailability against 3.4% cooked in a human feeding study²⁴. And a tray of sprouts carries no panel.

Against glucoraphanin-only supplements, the enzyme is the whole difference. Without active myrosinase, roughly 9.4–11.5% of the dose was absorbed; with it, roughly 40–41.8%⁹. Adding a myrosinase source raised absorption up to about eight-fold in a 12-person crossover¹⁰, and a 16-person crossover measured 39.8% against 18.6% for the same extract with and without mustard-seed myrosinase — a trial primarily funded by the ingredient's manufacturer, disclosed in the paper¹¹.

Against pre-converted or stabilised sulforaphane, we have nothing to offer. No head-to-head human trial comparing a stabilised sulforaphane product with a glucoraphanin-plus-enzyme product exists. Anyone ranking those two is reasoning, not citing, and that includes us.

One more correction: this page used to say you would need 100–200 grams of raw sprouts daily to match Sproutly's dose. No source we hold supports that equivalence, so it is gone. The general questions have their own pages — fresh sprouts versus a supplement, and how to judge any sulforaphane label, including labels that are not ours.

Several unrelated organisations share or nearly share this name. This page belongs to the supplement store at sproutly.store, operated by NH Resource Group LLC of New York⁴.

Sproutly Canada Inc. is a separate, publicly traded Canadian cannabis company, unconnected to this business. Sproutl, without the "y", is a UK garden retailer. Sproutful is a paid-survey site. A Japanese site-reliability-engineering service uses the name too; its queries appear in this page's own search data, which is how we know the confusion is real rather than theoretical.

That is a boundary, not a comment on any of them.

Here is what is verified, what is not, and what we do not know. The verdict is yours.

Verified. The operator is NH Resource Group LLC, a New York LLC named in its own policies, with binding arbitration and a class-action waiver in its terms^4,6. The label is what it says: 700 mg broccoli seed extract at 13% glucoraphanin, 200 mg broccoli sprout extract with active myrosinase, 100 mg mustard seed extract and 50 mg vitamin C per two-capsule serving, 30 servings to a pouch³. The guarantee runs 90 days from confirmed delivery on a first order, with the exclusions above⁴. US delivery takes 10 to 14 business days⁵. The one third-party rating this brand has is 3.4 out of 5 from 43 reviews, as of 2 September 2026¹.

Not supported. Every customer-count and star-rating figure Sproutly has published traces to no review platform². The "30 mg per capsule" figure is wrong on both the ceiling and the serving³. The 100–200 grams of sprouts equivalence has no source behind it. And no statement that this product treats, cures or reverses a diagnosed condition is supported — the one gut trial that exists moved markers, eradicated nothing, and reverted once it stopped²¹.

Unknown. Whether the myrosinase in the pouch you receive is still active. How long anything takes to be noticed¹⁶. What the vitamin C contributes in a human^12,13. Which private auditor, if any, certified our manufacturer. How our subscription enrolment and renewal work in every purchase path. All insufficient data, and it stays that way until it is not.

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

1. Trustpilot review profile for sproutly.store. TrustScore 3.4 out of 5 from 43 reviews; 51% five-star, 7% four-star, 5% three-star, 5% two-star, 32% one-star; profile claimed; replies to 93% of negative reviews, typically within a week. https://www.trustpilot.com/review/sproutly.store — read 2 September 2026. A 43-review base moves on a handful of reviews; open the profile for the current figure.
2. Sproutly's own published pages, read directly on 2 September 2026: this article's previous title, social tags and meta description; the product page at https://sproutly.store/products/sproutly-broccolli-sprout-extract-capsules and its page source, including the sticky rating bar and the FAQ block; and the brand's advertorial pages. Every review count and star rating attributed to sproutly.store in this article was read off one of these surfaces on that date.
3. Sproutly Broccoli Sprout Extract Capsules, Supplement Facts panel, photographed and transcribed 23 August 2026 and recorded in the brand's internal asset registry. Serving size 2 capsules, 30 servings per container; broccoli seed extract 700 mg (13% glucoraphanin), broccoli sprout extract 200 mg (active myrosinase), mustard seed extract 100 mg, ascorbic acid 50 mg; other ingredients vegetable capsule (HPMC), rice flour, magnesium stearate, silica; panel claim "Up to 30 mg sulforaphane per serving."
4. Sproutly refund policy, "The Sproutly Promise." https://sproutly.store/policies/refund-policy — read 2 September 2026
5. Sproutly shipping policy. https://sproutly.store/policies/shipping-policy — read 2 September 2026
6. Sproutly terms of service, last updated March 2026, including the binding arbitration agreement and class-action waiver. https://sproutly.store/policies/terms-of-service — read 2 September 2026
7. U.S. Food and Drug Administration. "Is It Really 'FDA Approved'?" and "Questions and Answers on Dietary Supplements." FDA states that registration of an establishment does not denote approval of the establishment or its products, that under DSHEA it does not have the authority to approve dietary supplements before they are marketed, and that it does not issue or recognise any certificate of registration or product status. https://www.fda.gov/consumers/consumer-updates/it-really-fda-approved · https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements · https://www.fda.gov/food/guidance-regulation-food-and-dietary-supplements/questions-regarding-whether-food-facilities-are-required-pay-registration-fees-and-private
8. Current Good Manufacturing Practice in Manufacturing, Packaging, Labeling, or Holding Operations for Dietary Supplements, 21 CFR Part 111. Compliance is a legal requirement enforced by FDA; FDA itself issues no GMP certificate, and any "GMP certified" mark comes from a private, voluntary third-party audit. https://www.ecfr.gov/current/title-21/chapter-I/subchapter-B/part-111
9. Fahey JW, et al. 2015. PLoS One. Crossover, n=5 core subjects, augmented to n=22 for the supplement comparison. Sulforaphane bioavailability ~9.4–11.5% of dose from preparations without active myrosinase; ~40–41.8% with it (100 µmol dose). PMID 26524341 · https://doi.org/10.1371/journal.pone.0140963
10. Okunade O, et al. 2018. Molecular Nutrition & Food Research. Randomised crossover, n=12. Adding 1 g powdered brown mustard to cooked broccoli raised sulforaphane bioavailability up to ~8-fold. PMID 29806738 · https://doi.org/10.1002/mnfr.201700980
11. Mastaloudis A, et al. 2026. Scientific Reports. Randomised double-blind crossover, n=16, single oral dose. Glucoraphanin-rich broccoli seed extract with mustard-seed myrosinase: 39.8 ± 3.1% bioavailability (range 5.3–76.9%) vs 18.6 ± 3.1% (range 2.2–38.1%) for the extract alone. Funded by the manufacturer of the tested ingredient; conflicts disclosed. PMID 41692762 · https://doi.org/10.1038/s41598-026-39389-4
12. Burmeister WP, et al. 2000. Journal of Biological Chemistry. X-ray crystallography, not a feeding study. Ascorbate binds the myrosinase active site and substitutes for the enzyme's catalytic base. PMID 10978344 · https://doi.org/10.1074/jbc.M006796200
13. Absence recorded, not filled. No human trial isolating added vitamin C as a variable in sulforaphane bioavailability was located; the 2026 crossover holds ascorbic acid constant in both arms. Searches run are listed in `03-sources.md` row N-8.
14. PubChem, Compound CID 5350 (sulforaphane). Molecular formula C6H11NOS2; molecular weight 177.3 g/mol. https://pubchem.ncbi.nlm.nih.gov/compound/Sulforaphane
15. Federal Trade Commission. Trade Regulation Rule on the Use of Consumer Reviews and Testimonials, 16 CFR Part 465, effective 21 October 2024. Prohibits, among other practices, reviews misrepresenting that they are by someone who does not exist, undisclosed insider reviews, suppression of negative reviews, and misrepresenting that an entity a business controls provides independent reviews of its own products. https://www.ftc.gov/news-events/news/press-releases/2024/08/federal-trade-commission-announces-final-rule-banning-fake-reviews-testimonials · https://www.ftc.gov/business-guidance/resources/consumer-reviews-testimonials-rule-questions-answers
16. Absence recorded, not filled. A dedicated search for a human trial measuring time to onset of a subjective effect from sulforaphane or broccoli sprout supplementation returned none. Searches run are listed in `03-sources.md` row N-7.
17. Chen J-G, et al. 2019. American Journal of Clinical Nutrition. Randomised placebo-controlled trial, n=170. Median 24-h urinary sulforaphane metabolite output 24.6 µmol (full dose), 10.3 µmol (half), 4.3 µmol (one-fifth). Only the full-dose group showed a statistically significant change in the detoxification biomarker measured. PMID 31268126 · https://doi.org/10.1093/ajcn/nqz122 (cited for the dose–response and biomarker figures only)
18. Egner PA, et al. 2011. Cancer Prev Res. Randomised crossover, n=50 (47 completed). ~70% of dose recovered in 24-h urine from a pre-hydrolysed sulforaphane beverage vs ~5% from a glucoraphanin-rich beverage. PMID 21372038 · https://doi.org/10.1158/1940-6207.CAPR-10-0296 (cited for bioavailability figures only)
19. Clarke JD, et al. 2011. Pharmacological Research. Crossover, n=12 (plus 4 controls). Peak plasma sulforaphane 7-fold higher and 24-h urinary excretion 5-fold higher from fresh broccoli sprouts than from a broccoli supplement, in the same subjects. PMID 21816223 · https://doi.org/10.1016/j.phrs.2011.07.005
20. Yagishita Y, Fahey JW, Dinkova-Kostova AT, Kensler TW. 2019. Molecules. Review. Sulforaphane activates the Nrf2/Keap1/ARE pathway, which regulates the body's own antioxidant and detoxification enzymes. Mechanism, not a clinical outcome; the one human trial designed to test Nrf2 target-gene induction directly was null on its primary endpoint (Wise RA, et al. 2016, PLoS One, PMID 27832073). PMID 31590459 · https://doi.org/10.3390/molecules24193593
21. Yanaka A, et al. 2009. Cancer Prevention Research. Randomised trial, n=48 (25 broccoli sprouts, 23 alfalfa-sprout control), 8 weeks. Reduced markers of H. pylori colonisation and gastric inflammation versus control. It did not eradicate the infection, and the effect reverted after the intervention stopped. PMID 19349290 · https://doi.org/10.1158/1940-6207.CAPR-08-0192 (cited for the trial's design and limits only)
22. U.S. Food and Drug Administration. "Notifications for Structure/Function and Related Claims for Dietary Supplement Labeling." Structure/function claims must carry the DSHEA disclaimer and be notified to FDA within 30 days of first marketing. https://www.fda.gov/food/information-industry-dietary-supplements/notifications-structurefunction-and-related-claims-dietary-supplement-labeling
23. Sproutly contact and support page. https://sproutly.store/pages/contact-sproutly247support — read 2 September 2026
24. Vermeulen M, et al. 2008. Journal of Agricultural and Food Chemistry. Human feeding study, raw vs cooked broccoli. Bioavailability 37% raw vs 3.4% cooked; peak plasma time 1.6 h vs 6 h. PMID 18950181 · https://doi.org/10.1021/jf801989e