QSC / "Tracy"

Buyers reported paid QSC orders that were not filled from December 2024. On January 10, 2025 QSC announced a pause in its operation, and it did not return for nearly seven months. In September 2025 QSC said it had “got busted” and tied fixing those late-2024 orders to a future restart of international shipping. In April and May 2026 QSC told customers that many international orders were delayed or lacked tracking and that there were no refund or credit options. The vendor kept trading throughout. On June 8, 2026 MESO-Rx banned QSC as a source for posts that let a complaining customer’s home be identified.

Full investigation: QSC Tracy review and investigation measures QSC’s lab record against size- and product-matched peers, controls for who paid for each test, and reaches a split verdict. This entry is the dated timeline; the investigation is the analysis.

QSC (Qingdao Sigma Chemical) is a China-based research-peptide vendor. Orders were handled through a sales contact using the name “Tracy”, whose messaging profile used a photo of the Chinese actress Zhang Xinyu. In a February 2026 interview, Tracy said the avatar was not about fandom.

Timeline:

• December 26, 2024. A GLP-1 Forum thread reports non-delivery of a $130 wire for a tirzepatide 10 mg kit. The poster says QSC contacts first said payment had not arrived, then blamed their bank, then stopped replying. Two days later the forum’s QSC vendor account, “Qingdao Sigma”, replied that its bank accounts were not frozen, and that when they are temporarily blocked at a bank’s request, transfers it has not confirmed are refunded through the original route, which it said can take from a few days to “4-6 weeks”. The buyer did not post again in the thread, and we hold no record of whether the $130 was refunded or the order filled.
• January 9-10, 2025. A “Tracy gone MIA?” thread collects reports of stalled orders. On January 10, QSC’s Telegram channel announced: “For security reasons our operation will be paused few days, then will resume once everything is sorted and under control, no more details will be provided, all communication channels are shut down temporary.” The next post in our capture of that channel is dated August 4, 2025.
• Early August 2025. QSC returns on Telegram with an “Official Comeback Announcement”. A February 2026 interview write-up summarises it as citing arrests, seized machinery and confiscated funds, saying QSC was restarting from scratch, and promising to make people whole over time; a GLP-1 Forum thread dated August 1, 2025 reproduces it. We hold no capture of the announcement itself.
• September 20, 2025. Answering “What about my pending order from late 2024?” on its channel, QSC writes: “we got busted. We lost everything.” It says its ability to fix orders from that period “is directly tied to our ability to resume full international operations”.
• November 2025. A MESO-Rx member reports a $7,500 order placed that month (thread started March 24, 2026). He says customs stopped the package and sent it back. He says its tracking had shown no movement in China since February 25, 2026. He says Tracy agreed to a reship or refund, then stopped opening his messages, and that he thinks she may have blocked him.
• April 13, 2026. QSC’s channel tells customers that “many international orders have been delayed, and some are missing tracking numbers”, attributes this to official attention at its logistics hub, and says there will be “No refunds, no order changes, no credits” until a tracking number arrives. The full message is quoted below.
• May 15, 2026. QSC tells its channel that an international order “from late March or April” may take two months to ship, and that “there are no refund/credit options”.
• June 8, 2026. MESO-Rx permanently bans QSC as a source. The notice is a signed administrator post in QSC’s own vendor thread. Its stated ground is not the shipping dispute. The administrator writes that the source “publicly posted screenshots and supporting information relating to a customer who was complaining about a missing order” with redactions that were “grossly inadequate”, so that third parties could “reconstruct and identify the customer’s exact residence within minutes”, and that the source also disclosed the customer’s cryptocurrency payment address. The notice concludes: “Effective immediately, the source is permanently banned … because the source engaged in severe and dangerous doxxing of a customer.”
• July 27, 2026. QSC posts a four-image album on its Telegram channel naming a customer it accuses of spreading false seizure claims, with his order history, tracking dashboard, private messages and forum posts. We do not reproduce or link the images and do not name him.
• July 28, 2026. QSC tells its channel that promotional pricing will depend on whether a customer posts public reviews: “From now on, promo prices will look different depending on who you are. Call it a loyalty discount. Call it a tax for the ungrateful.” The post asks for “something public that help us grow”, listing “Forums, reddit, TG groups, discords”. A channel post the next day claims MESO-Rx banned at least 40 accounts in response. That figure appears in no forum record we have seen and rests on QSC’s statement alone.

The April 13, 2026 broadcast, verbatim:

I think it's time I give you some context. Believe it or not, that's up to you — but here's the situation.

You may have noticed that many international orders have been delayed, and some are missing tracking numbers. That's because the logistics hub where we keep our stock and handle shipments became part of a temporary unwanted official attention. It turns out that some other clients of theirs were involved in something serious — let's just say it's the kind of thing that draws unwanted attention. As a result, the person who manages our shipments was taken for a chat. He's expected to be done with formalities in the coming days, as he's clearly not involved, but the whole thing has brought our operations to a crawl.

Before this happened, he shipped many international orders but didn't log the tracking into the system we share. So some of you might receive your package before ever seeing a tracking number. Others may not have been shipped yet — and honestly, I won't be able to tell which is which until he's back.

For the ones we know haven't shipped, we're already arranging to move some fresh stock to another logistics partner — though we can't move everything out of the affected warehouse just yet.

That said, let's be real: you're in this space, and you know what comes with it. You take a risk, we take a bigger one. A little patience isn't too much to ask. If you're worried about missing your next dose or dealing with an unhappy customer somewhere down your own chain — honestly, that's not my priority right now.

No refunds, no order changes, no credits — not until you have a tracking number in hand. That's going to take a few more days. Every message asking for updates will go unanswered, because I can't reply to everyone individually. You already know the answer: either your order shows up without tracking, or you'll get the number when it's ready.

Domestic operations (USA, UK, EU, AU, Canada) are running normally — no delays, no issues. Don't make this harder than it already is. Shit happens in this business. Wait patiently.

How QSC explained the disruptions. QSC’s own posts attribute both to action by authorities: “we got busted” (September 2025, about the late-2024 orders) and a logistics contact who “was taken for a chat” (April 2026). Neither post documents it. Both periods came with a refusal of individual updates (“no more details will be provided” in January 2025; “Every message asking for updates will go unanswered” in April 2026), and neither offered refunds for unfilled orders: in September 2025 QSC tied the late-2024 orders to a future restart, and in April and May 2026 it ruled out refunds or credits. The April message states that domestic warehouses were unaffected.

Impersonators: accounts and storefronts claiming to be QSC or “Tracy” need independent checks. See The impersonator layer below.

Correction — September 22, 2026: We previously described qsc-usa.com as an official QSC website and attributed that claim to an August 2023 forum alert. We have not verified the cited source’s supporting wording or date, and we are withdrawing the website attribution. Calling the supposed rule merely outdated did not address that evidence gap.

The QSC announcement channel tracked by TitrateLab stated on September 15, 2026 that it has no website for orders. That statement conflicts with storefronts claiming to accept website orders as QSC. A familiar brand name, copied branding or a site’s own claim to be official does not establish its authorization. The announcement is evidence of the channel’s stated ordering policy; it does not independently establish the ownership or conduct of every similarly named domain.

Related TitrateLab research: How ChatGPT Promoted a Fake Chinese Peptide Website documents a ChatGPT answer that presented a storefront as QSC, and the September 22 correction to this entry.

Evidence tier: Documented record.

Sources: GLP-1 Forum threads (December 26, 2024, January 9, 2025, August 1, 2025); MESO-Rx $7,500 thread; MESO-Rx administrator ban notice, June 8, 2026; QSC Telegram channel posts captured by TitrateLab (messages 73, 132, 541, 567, 668-671, 673 and 677); QSC ordering-channel statement, September 15, 2026; Tracy interview, February 18, 2026.