Preservation of Peptides from Manufacturers

[smurfette]

Dr. T.

I am thinking of doing some DIY skin care with peptides. I have read that peptides, unless prerserved in solution properly, can be broken down and useless before purchase.

Do peptides have to be suspended in, say, glycerin, hyaluronic acid, in order to keep them intact and active? Does water in solution, break them apart and render them useless?

These are the peptides I am looking at and they are all in different solutions:

MATRIXYL
Glycerin (and) Water (and) Butylene Glycol (and) Carbomer (and) Polysorbate 20 (and) Palmitoyl Pentapeptide-4

MATRIXYL 3000
Glycerin, Butylene Glycol, Water(Aqua), Carbomer, Polysorbate-20, Palmitoyl Oligopeptide (and) Palmitoyl Tetrapeptide-7

ARGIRELINE
Water (Aqua), Acetyl Hexapeptide-8, and hyaluronic acid

ARGIRELINE
Water (and) Acetyl Hexapeptide-8

Are any of these, in your opinion, a good product, in respects to the peptides still being active and unbroken?

Thank you.

[drtodorov]

Water at neutral pH does not break most peptides down quickly. If pH is acidic or there is contamination with enzimes and/or microorganisms than peptides may be degraded much faster.