How Do You Check a SynoGut Lot Number and Certificate of Analysis?
Written by the Synogut editorial team · Medically reviewed by Dr. Will Bulsiewicz, MD, Physician
Last updated · Review date: October 16, 2026 · Who reviewed this page · How we write and review
Compare the lot printed on your SynoGut bottle with SYN-26/GO-6181 and the certificate reference SYN-6181-26-GO. Both are draft labels, not lab proof, and no lab report is published. A matching code shows the paperwork agrees with the bottle. It does not show purity or strength. Ask the order desk for more.
Key facts
- The lot reference in the seller paperwork is SYN-26/GO-6181.
- The certificate of analysis reference is SYN-6181-26-GO. No lab report sits behind it in public.
- Both codes are draft labels, not lab proof.
- A genuine bottle is blue and reads SYNOGUT, Dietary Supplement, 30-Day Supplement and 60 capsules.
- Where the lot and date are printed on the bottle is not published, so check the label edges, the base and the cap.
- Questions go to the order desk on +1 (302) 200-3480, with your order ID ready.
What are the SynoGut lot number and certificate codes?
Two codes appear in the seller paperwork. The first is the lot reference, SYN-26/GO-6181. The second is the certificate of analysis reference, SYN-6181-26-GO.
A lot code names one production batch. It lets a seller trace where a bottle came from. A certificate of analysis, or CoA, is a lab document that lists test results for a batch. The two should work together: lot on the bottle, CoA for that lot.
Here the second half is missing. The paperwork carries a CoA reference, but no lab report has been published behind it. No testing lab is named. So the codes are best read as draft labels. They are tidy tags, not test results.
| Reference | Value | What it can tell you |
|---|---|---|
| Lot reference | SYN-26/GO-6181 | A batch label to compare with your bottle |
| Certificate reference | SYN-6181-26-GO | A document code. No report is published |
| Testing lab | Not published | No lab is named |
| Maker or distributor | Not on the bottle images or the info site | Check your back label |
What does a matching code actually prove?
Less than most people hope. If your bottle carries SYN-26/GO-6181, it shows your bottle uses the same reference as the seller paperwork. That is all.
It does not show how much psyllium is in a capsule. It does not show that the clay is free of lead. It does not show that the facility follows good manufacturing practice. Only a lab test can show amounts or heavy metals, and no such report is published for this product.
- A matching label shows the bottle fits the seller's design, count and ingredient names.
- A sealed bottle shows nobody opened it after it was packed.
- A lab report is the only thing that can confirm amounts and heavy metals. It is not published.
Why does this matter for SynoGut? Because bentonite clay is on the bottle art. FDA once found high lead in one bentonite clay powder sold for drinking and told people not to use it (FDA, 2016). That notice covered a single clay powder, and SynoGut was not it. Still, it is the reason a heavy-metal result would be worth having.
What should a genuine SynoGut bottle look like?
Start with the front, because it is the part the seller images show. A genuine bottle is blue. It reads SYNOGUT, Dietary Supplement, 30-Day Supplement and 60 capsules.
The product is a capsule. If a listing offers gummies, drops, tablets or a powder under the SynoGut name, stop. The bottle art does not match.
| Fact | What is published |
|---|---|
| Bottle front | SYNOGUT, Dietary Supplement, 30-Day Supplement, 60 capsules |
| Ingredients on the bottle art | Psyllium, bentonite clay, black walnut, oat, flaxseed, prune |
| Lot and certificate codes | SYN-26/GO-6181 and SYN-6181-26-GO, both draft labels and not lab proof |
| Maker or distributor | Not named on the bottle images or the info site |
On the back, look for a Supplement Facts panel, an ingredient list, a maker or distributor name and a warning line that asks you to keep the bottle out of reach of children. We have not seen the back, so we cannot say what it prints. That is the point of checking it yourself.
How do you check a SynoGut bottle, step by step?
- Step 1
Check the source
The order should come from the USA Authorized Synogut Retailer. Keep the order email.
- Step 2
Count the bottles
The count should match your pack: 2, 3 or 6.
- Step 3
Read the front
Blue label with the four lines named above.
- Step 4
Read the back
Look for the panel, the ingredient list and a maker name.
- Step 5
Find the lot and date
Write them down. If you cannot find them, note that too.
- Step 6
Compare the lot
Compare what you wrote with SYN-26/GO-6181.
- Step 7
Call with doubts
Phone +1 (302) 200-3480 with your order ID before you open the bottle.
Hold the box and the order email until the checks are done. The desk may ask about both.
Where are the lot number and best-before date on a SynoGut bottle?
Where they sit is not published. We have no back-label image, so we cannot point to a spot. On many bottles, a batch code sits near a label edge or on the base, so look there first, then around the cap.
Some bottles show a lot and a date, and some show only one. If your bottle shows neither, that is worth a call. It does not prove the bottle is fake. It does mean the bottle cannot be traced to a batch from your side.
Which signs point to the wrong product?
The strongest sign is a seller you cannot trace to the authorized retailer. A different formula under the same name comes next. The list below gives the signs, and one is enough to stop and call.
- Gummies, powder or tablets that carry the SynoGut name.
- A bottle holding any count of capsules but 60.
- A lead ingredient that is a probiotic with a CFU count, not the plant list.
- No flaxseed, prune or clay on the label, which one third-party seller says of an Amazon product.
- A bottle that arrives opened or damaged.
- A listing that calls the product a cure for constipation, IBS or parasites.
- Detox or weight-loss promises printed on the box.
That Amazon report is unverified, and we could not confirm any Amazon or Walmart listing at our last check. NCCIH notes that some probiotic products do not match their labels (NCCIH, 2019 (probiotics)), which is one more reason the source of your bottle matters.
What should you ask the SynoGut order desk about testing?
You are allowed to ask. A seller that stands behind a batch should be able to answer plainly. These five questions cover the gaps.
- Can I see a lab report for my lot?
- Was my batch checked for lead and other heavy metals?
- Which company makes the capsules, and in which place?
- Who audited the factory for good manufacturing practice, and when?
- Is the oat certified free of gluten?
Write down the date of the call and the name of the person who helped you. If the desk cannot answer, that is useful to know. It tells you the blanks you saw online are real blanks.
The info site says the capsules come from an FDA approved and GMP certified facility. FDA does not approve supplements or factories, and it does not issue registration certificates (FDA, 2024 (registration)). At most a plant can be FDA registered, which describes the building, not the product.
What do you do if your SynoGut bottle looks wrong?
Do not take any capsules. Set the bottle aside, keep the box and the order email, and take clear photos of the front, the back, the cap and the box.
Then call +1 (302) 200-3480 with your order ID. Ask if the bottle should come back under the refund terms. The guarantee runs 60 days, and the buyer pays tracked return postage.
Did you swallow capsules from a bottle you doubted, and now feel unwell? Call your doctor. FDA explains how consumers can report a problem with a dietary supplement (FDA, 2026).
| Fact | What is published |
|---|---|
| Guarantee | 60-day money-back. Claim by phone with your order ID. The buyer pays tracked return postage |
| Refund timing | 3-5 business days after the returns desk credits you, then 5-10 days on your card |
| Order desk | +1 (302) 200-3480 for orders, tracking and refunds |
Frequently asked questions
Short answers about checking a SynoGut bottle, from the seller paperwork and the FDA sources named on this page.
How do I check the lot number on my SynoGut bottle?
Look for a printed batch code near a label edge, on the base or by the cap. Write it down, then compare it with SYN-26/GO-6181. If you cannot find one, call the order desk.
What is SYN-26/GO-6181?
It is the lot reference in the seller materials, and it is marked as a draft label. It is not a lab report. A match only shows your bottle carries the same reference as the paperwork.
Can I ask for a SynoGut certificate of analysis?
Yes, you can ask. A draft certificate reference, SYN-6181-26-GO, exists, but no lab report behind it is published. The desk can tell you whether a report exists for your lot.
Does a matching lot code mean my SynoGut is safe?
No. It only shows the codes agree. Only a lab test can measure amounts or heavy metals, and no such report is published for this product.
What if my SynoGut bottle has no lot number?
That means the bottle cannot be traced to a batch from your side. It does not prove the bottle is fake, but call the order desk before you use any capsule.
Where do I report a bad reaction to a supplement?
Stop taking it and let your doctor know. FDA explains how consumers can report a problem with a dietary supplement. For a refund, also call the order desk with your order ID.
Our view
Checking a lot code is a good habit, but be clear about what it can do. It can catch a bottle that does not match the seller's paperwork. It cannot tell you what a capsule holds.
For SynoGut, the gap is a lab report. No independent test is public, and no testing lab is named. Until one appears, the fair stance is to check the source, check the label and ask the desk your questions.
FDA has not approved SynoGut, and it approves no supplement before sale. If you take daily medicines or have a health condition, ask your doctor or pharmacist before you start.
Last updated November 4, 2026.
