M
Marcus P.
3 reviews · United Kingdom
5 Sept 2026
Website could show more data
The material and service were both good. I would like to see purity reports linked directly from the product page rather than a separate archive.
Reviews 35 · Great
Zenith Bio Labs sits in the lower half of our table, which reflects incomplete documentation coverage rather than any pattern of serious complaints. Several catalogue lines carry analysis; others do not, and our scoring treats a missing certificate as missing evidence rather than assuming the best.
Reviewer feedback is mixed but generally acceptable, with delivery timing the most common source of criticism. Buyers who choose this supplier should request a batch-matched certificate for the specific vial before ordering.
Marcus P.
3 reviews · United Kingdom
The material and service were both good. I would like to see purity reports linked directly from the product page rather than a separate archive.
Mia N.
10 reviews · United Kingdom
The outer box arrived visibly dented and every vial inside was still perfect. Whoever packs these knows what they are doing.
Owen R.
5 reviews · United Kingdom
No issues with the material or the paperwork. The outer box was a little light on padding, though everything arrived intact and sealed.
James Z.
12 reviews · United Kingdom
Mass spec and HPLC results supplied for the exact lot, both dated within the last few months. That is what I look for first.
Owen F.
1 review · United Kingdom
Clean intact cake in every vial, no cracking or residue on the stopper. Reconstituted clear with no cloudiness.
Elena H.
10 reviews · United Kingdom
Product side was excellent. Support answered within about a day rather than a few hours, which is fine but not instant.
Freya K.
9 reviews · United Kingdom
Everything arrived as described and the seals were intact. Only small gripe is that the invoice took a couple of days to come through.
Owen A.
1 review · United Kingdom
Queried a discrepancy in the storage note and had a corrected label emailed the same afternoon, along with an explanation.
Marcus H.
4 reviews · United Kingdom
Asked for the full analytical report for an older batch and had it emailed within a few hours. No pushback, no vague replies. That transparency is the reason I keep ordering.
Noor R.
3 reviews · United Kingdom
No frills to the presentation but the important parts are right: sealed vials, matching paperwork and quick dispatch.
Tom S.
10 reviews · United Kingdom
Full analytical package including the raw chromatogram files. Most suppliers send a one page summary and hope you do not ask.
Elena G.
5 reviews · United Kingdom
Quantity, presentation and purity all matched the product page. No surprises, which is the highest compliment in this space.
Daniel G.
3 reviews · United Kingdom
Slightly more than my last order a few months ago. Still reasonable given the level of testing they publish.
Lena V.
3 reviews · United Kingdom
Two people in the lab have ordered since on my recommendation and both had the same clean experience. That says enough.
Clara F.
5 reviews · United Kingdom
Courier delay rather than anything the supplier did. Support proactively messaged with an updated tracking link, which was appreciated.
Elena D.
3 reviews · United Kingdom
Checkout was simple, confirmation arrived instantly and the dispatch note included the batch numbers. No chasing required at any point.
Mia G.
10 reviews · United Kingdom
One item was out of stock and they told me before taking payment rather than after. Refreshing compared to suppliers that just sit on the order.
James C.
3 reviews · United Kingdom
Insulated liner and gel packs that were still frozen after two days in transit. Clearly they think about how the product travels.
Marcus D.
7 reviews · United Kingdom
Ordered two research vials and the certificate of analysis lined up with the batch number on the label. Chromatograms were readable and dated, which is more than most suppliers manage.
James V.
4 reviews · United Kingdom
Order confirmation, dispatch note and delivery update all arrived without me needing to ask. Simple things done properly.
Isla T.
10 reviews · United Kingdom
The wrong report was in the box initially. One email and the correct one arrived within the hour with an apology.
Peter M.
2 reviews · United Kingdom
Every vial had an intact flip cap and the shipment carton was sealed with numbered tape. Easy to verify nothing had been opened.
Daniel C.
7 reviews · United Kingdom
Shipped the next working day with cold packs still cold on arrival. Vials were intact and the seals were untouched. Communication was clear the whole way through.
Rhys G.
3 reviews · United Kingdom
The lot report went live on their site before the parcel even left. I could check the figures while the order was in transit.
Noor T.
4 reviews · United Kingdom
Comparing reports across three separate lots and the numbers barely move. Consistency like that is rare at this price point.
Lucas S.
10 reviews · United Kingdom
Sent a sample for third-party testing out of curiosity and the result was within a fraction of the published figure. Hard to ask for more than that.
James P.
4 reviews · United Kingdom
Not the cheapest option but the documentation justifies the difference. Would rather pay slightly more and know what is in the vial.
Felix Z.
7 reviews · United Kingdom
Solid service and good material. A wider catalogue and a tracked shipping option as standard would make it a five.
Daniel P.
8 reviews · United Kingdom
Second order placed a month later and the experience was identical. Same packaging standard, same paperwork, same dispatch speed.
Nina F.
12 reviews · United Kingdom
Third order in six months and the reported purity has been consistent each time. Labelling is clear and reconstitution notes are included in the box.
Saoirse R.
6 reviews · United Kingdom
Every vial carried a batch code that resolves to a report on their site. That alone puts them ahead of most of the market.
Aisha D.
2 reviews · United Kingdom
Product pages state what has been tested and what has not. I trust a supplier that admits the limits of its own data.
Viktor S.
10 reviews · United Kingdom
Shipped the next working day with cold packs still cold on arrival. Vials were intact and the seals were untouched. Communication was clear the whole way through.
James Z.
5 reviews · United Kingdom
Product pages state what has been tested and what has not. I trust a supplier that admits the limits of its own data.
Felix R.
10 reviews · United Kingdom
Quantity, presentation and purity all matched the product page. No surprises, which is the highest compliment in this space.