Does Every New Peptide Batch Need a New COA?

It should.

A COA is supposed to tell you what happened when a specific sample was tested.

Not what happened six months ago.

Not what happened with the last supplier.

Not what happened with one perfect vial that has been doing marketing duty ever since.

New batch means new material.

And new material means the old report may no longer tell you much.

Even when the peptide name is the same, the actual batch can come from a different production run, a different shipment or a different supplier.

That is where companies get lazy.

They keep the same COA on the website because the product name has not changed.

But the product name is not the batch.

A fresh report does not guarantee perfection.

It does show that someone bothered to test what is actually being sold now.

That is a much stronger standard than hanging one old PDF on the wall and hoping nobody checks the date.

All products are sold strictly for laboratory research purposes and are not intended for human consumption.