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A deliberately short list

Peptide capsules, and why so few

Most peptides do not survive the stomach. The ones that appear in capsule form are here because something about their structure or their target makes the oral route worth investigating at all.

2 capsule products≥99% by HPLCCOA per batchShips within 24h
The problem

A peptide is food to a protease

The digestive tract is very good at taking chains of amino acids apart. That is literally its job. A peptide swallowed as-is meets stomach acid first and a wall of proteolytic enzymes second, and most of them do not come out the other side intact enough to be worth measuring.

There are two ways around it. Either the sequence is unusually resistant, or the target sits in the gut itself, so degradation on the way to the bloodstream is beside the point. Both of the products on this page fall into one of those two categories.

Anyone offering you a long list of oral peptides is either using enteric coating claims they cannot support, or is not being straight with you about what happens after the capsule dissolves.

What decides whether oral works

  • Chain length — shorter sequences fare better
  • Whether the target is in the gut or past it
  • Resistance to proteolytic cleavage
  • Whether the literature measured anything at all after oral use

Research context only. This is not a statement about effects in people.

The range

Capsules and the solvent

Two capsule products, plus the bacteriostatic water that every reconstitution step needs.

Frequently asked

About the oral format

What people ask about capsules specifically.

Why can I not get every peptide as a capsule?
Because for most of them the oral route has never been shown to deliver anything measurable. Offering a capsule version would mean selling a format the literature does not support, and we would rather have a short list than a dishonest one.
Does an enteric coating solve the problem?
It helps a peptide past stomach acid, but acid is only the first obstacle. The enzymes in the small intestine are the bigger one, and a coating does nothing about those. Treat broad enteric claims with scepticism.
How should capsules be stored?
Cool, dry and out of direct light, in the original container with the desiccant left in. Humidity is the enemy here rather than temperature, which is the opposite of what applies to a reconstituted vial.
Is bacteriostatic water a capsule product?
No, it is listed here because it is the accessory the rest of the catalogue depends on. It is the solvent you add to a lyophilised vial, and it is deliberately sold separately so you control the final concentration.
Ready to order?

Short list, honest reasons

Two capsule products, both released at 99% or higher by HPLC with the certificate available per batch. The rest of the catalogue is in formats where the evidence actually supports them.

For laboratory and research use only. Not for human or animal consumption. Not a medicine and not a food supplement. Sold to persons aged 18 and over.

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