Journal
Peptides in NZ: what is legal, and what to know
Peptides in New Zealand explained: skincare, collagen and injectable peptides, what is legal, how Medsafe treats them and where each one is sold.
Are peptides legal in New Zealand?
Are peptides legal in New Zealand? How cosmetic skincare peptides differ from injectable peptides, what Medsafe says, and why research labels change nothing.
What are peptides?
What are peptides? Short chains of amino acids used in skincare, supplements and medicines. How they differ from proteins and what they are used for.
Collagen peptides vs skincare peptides
Collagen peptides and skincare peptides are not the same thing. How each one is used, what research shows about collagen supplements and which to choose.
Peptides for weight loss in NZ: what is approved
Which peptides for weight loss are approved in New Zealand? Wegovy and Mounjaro need a prescription, while retatrutide is not approved.
Peptides for muscle growth in NZ: what to know
Do peptides build muscle? What NZ gym-goers should know about BPC-157, CJC-1295 and ipamorelin: Medsafe's position, sport bans and what is unproven.
Peptides in skincare: what they do for skin
Peptides in skincare are short amino acid chains used to support the look of firmer, smoother skin. What they are, the main types and what evidence shows.
Copper peptides in skincare: what GHK-Cu does
Copper peptides (GHK-Cu, or copper tripeptide-1) explained: what they are, what the research shows, how to use them and what to pair them with.
What is PDRN in skincare?
PDRN is a DNA-derived ingredient, usually from salmon. What it is, how serums differ from clinic injections, and what the research does and does not show.
Copper peptides for hair: what is actually known
Do copper peptides help hair? What research on GHK-Cu and scalp care shows, what it does not show and how to use a copper peptide on the scalp.
Copper peptides vs retinol: which should you use?
Copper peptides vs retinol compared: strength of evidence, irritation, sun care and how to use both in one routine without overloading your skin.
How to choose the best peptide serum in NZ
How to choose the best peptide serum in New Zealand: what to check on the label, how to compare value and which peptides suit which goal.
Can you use peptides with vitamin C?
Can you use peptides with vitamin C? Why low pH formulas are often kept apart from peptides, and an easy morning and night routine that uses both.
How to use a peptide serum
How to use a peptide serum: where it goes in your routine, how much to use, morning or night, and how long to try it before you judge the result.
Argireline (acetyl hexapeptide-8) explained
Argireline, or acetyl hexapeptide-8, explained: how it is meant to work, why it is not topical Botox, and what the research shows about expression lines.
Do peptide eye creams work?
Do peptide eye creams work? What they can and cannot do for fine lines and tired-looking eyes, what ingredients to look for and how to apply one.
How to read a skincare ingredient list
How to read a skincare ingredient list: what INCI names mean, why order matters, how to find peptides and what brands leave out of their labels.
Post-gym skincare routine
A simple post-gym skincare routine: when to wash, what to apply after sweating, and how to fit serum, moisturiser and sunscreen around your training.