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How Do You Check a Supplement Lot Number on Your Bottle?
To check a supplement lot number, find the code printed on the bottle, write it down, and send it to the seller to match against their records. A lot number names a batch, not a quality grade. The flat Reviralis label image shows no lot code, so read the base or cap of your own bottle.
Written by the Reviralis label deskUpdated · 4 min read
The code01
What is a supplement lot number?
A lot number is a code that names the batch a bottle came from, so a problem can be traced to a set of bottles and not to a whole brand.
It is usually stamped or inked on the base, the neck or the cap, often next to a best-before date. It may be letters, numbers or both. It is not a score. Two bottles with different lots can be equally good, and two with the same lot were made together.
Q: Why does it matter? A: Recalls, lab reports and complaints are tied to lots. Without the code, none of those can be matched to your bottle.
The steps02
How do you check a supplement lot number?
Read the code, record it, compare it, and ask. Four steps cover it.
Find the code
Turn the bottle over and look at the base, then the neck and cap. Photograph it in good light.
Write it with the date
Note the lot, the best-before date if one is printed, and the date you bought the bottle.
Compare with the seller's record
Send the code and your order number to the seller. Ask them to confirm it belongs to their stock.
Ask what the code links to
Ask for the lab report for that lot, and for any recall notice, if one exists. See what a certificate of analysis shows.
Keep the photo with the receipt. If you ever need to report a reaction, the lot is the first detail asked for (FDA, MedWatch).
This product03
Where is the lot number on a Reviralis bottle?
We cannot say. No lot number or best-before date is visible on the flat label image we use, so look at your own bottle.
The seller lists lot R-26/IR-5592 and certificate R-5592-26-IR. These are seller references, not lab proof. If the code on your bottle matches, that tells you your bottle belongs to the seller's listed batch. If it differs, write to the seller and ask what lot you hold and why.
| Result | What it suggests | Next step |
|---|---|---|
| Codes match | Your bottle is from the listed batch | Ask for the lab report for that lot |
| Codes differ | Newer or older batch, or a listing out of date | Ask the seller which lot you hold |
| No code on the bottle | Cannot trace the batch | Photograph the bottle and write to the seller |
Contact details are on the contact page. The batch references are explained on the batch verification page.
Reviralis: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsWho can confirm04
Who can confirm a lot number is genuine?
Only the maker, the distributor or the seller holds the batch records. A buyer cannot confirm a lot alone.
The label names Phyto Thrive Labs of Largo, Florida as distributor, with an email and no phone number. The order desk is a separate contact. Try the seller first, then the distributor.
A confirmed lot does not make a supplement work. Reviralis is not an antiviral. Herpes has no cure, and prescription antivirals are the proven care. No source we found shows that Reviralis prevents or reduces outbreaks, so keep any prescribed medicine. If a lot is ever recalled, a clinician and the FDA should hear about a reaction (FDA, MedWatch).
FAQ05
Reviralis questions people ask
Is the lot number the same as the expiration date?
No. The lot number names the batch. The best-before or expiration date says when the maker expects the product to stay at its stated strength. Many bottles print both, often side by side.
What if my supplement bottle has no lot number?
Photograph the bottle, keep the receipt and write to the seller. Without a lot, a report or recall cannot be matched to your bottle, so ask the seller to name the batch you hold.
Can I look up a lot number online?
Only if the maker or an independent program publishes lots. Many do not, so the answer comes from the seller. Ask them to confirm the code and send the lab report tied to it.
Does a matching lot number prove the bottle is safe?
No. A match shows your bottle came from a known batch. Safety depends on the test report for that lot and on your own health and medicines, which a clinician can review.
Who wrote this06
Written and reviewed by
Pages built from the label, the order page and linked NIH, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized Reviralis Retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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