Clear, sourced knowledge about peptides.

See all sources
Contact
NOEN

Search peptides, guides and rules

Understand peptides before you make a choice.

What peptides are, how they work and what the research has found, explained clearly and with sources.

Popular searches:RetatrutideBPC-157What are peptides?GHK-Cu

Peptides by topic

Weight and metabolism

The best-researched peptides of all, tested in studies with thousands of people.

  • How much weight do people lose?

    In the largest studies, participants lost on average about 15 per cent with semaglutide and up to 21 per cent with tirzepatide. In the highest dose group for retatrutide, the figure was 25 per cent.

  • How do these medicines work?

    They mimic hormones the gut releases after a meal, such as GLP-1 and GIP. These hormones help you feel full and help the body control blood sugar.

  • Do the benefits go beyond weight?

    Yes. In a study of more than 17,000 people, fewer had a heart attack or stroke or died of cardiovascular disease on semaglutide. With retatrutide, knee pain in osteoarthritis and breathing pauses in sleep apnoea went down.

  • How do I get one of these medicines?

    Talk to your doctor. With a prescription, you collect semaglutide or tirzepatide at a pharmacy or order from an approved Norwegian online pharmacy.

All about weight and metabolism

Training and recovery

Research on healing and recovery.

All about training and recovery

Skin, ageing and wellbeing

Copper peptides and research on ageing skin, joints, gut and brain.

  • What does GHK-Cu do for the skin?

    This small copper peptide occurs naturally in the body and is a common ingredient in creams and serums. In the laboratory, it has shown effects on skin healing and connective tissue renewal.

  • What about the gut and the brain?

    KPV, three amino acids from an anti-inflammatory hormone, calmed gut inflammation in mice. Semax has been studied in patients after stroke, with somewhat faster recovery.

All about skin, ageing and wellbeing

How far has peptide research come?

All research on new medicines starts in the laboratory and moves on to studies in humans. For each peptide we show where on that path the research is today.

  1. Lab and animal studies

    The research is at the laboratory stage, where all medicine research starts. Promising findings here are the basis for studies in humans.

    TB-500, MOTS-c, KPV

  2. Early studies in humans

    The first studies in humans have been done. The next step is larger, controlled studies.

    BPC-157, GHK-Cu, Melanotan II, Semax, CJC-1295 and ipamorelin

  3. Controlled studies in humans

    Tested in at least one good controlled study in humans, or in several smaller studies that point the same way.

    Thymosin beta-4

  4. Large studies in humans

    Tested in several large, controlled studies in humans with consistent results.

    Retatrutide, Semaglutide, Tirzepatide

Read the full method

What people say about Norwegian vendors

Read a detailed comparison

Explore feedback on ordering, delivery and customer support from Norwegian peptide vendors. For education only, with no promotion or recommendations.

Knowledge you can check yourself

Everything we write is based on published research and official sources. Every claim has a numbered link, so you can read the study yourself.

Studies and product tests

Want to know more than what is already published? We can help with a new study, or with finding out what a product actually contains.

Fund a study

Do you have a question about peptides that deserves a closer look? You can fund a study through us. We always say who paid, and whoever pays does not decide the result.

Ask about a study

Test a product

Wondering what a product you bought actually contains? We can have it analysed in a lab and explain the results in plain language. Get in touch and we will tell you what we can test.

Ask about a test

Do you have a question about peptides?

Write to the editors. We usually reply within a few working days, and tips about new studies are always welcome.

Contact usHow we work

About Peptideguiden

A short note on who we are, how we assess the research and where the information comes from.

What is Peptideguiden?

Peptideguiden is a website about peptides for readers in Norway. We explain what peptides are, how they work and what the research has found, with sources for everything we write.

Who is Peptideguiden for?

For anyone curious about peptides, whether you are interested in weight, training and recovery, or skin and wellbeing. The pages are written for everyday readers, and technical terms are explained along the way.

Where does the information come from?

Every claim about effects has a numbered source, mainly peer-reviewed studies and public authorities. All sources are collected in the source library, where you can filter by peptide, study type and year.

How do you assess the research on a peptide?

For each use we show how far the research has come: lab and animal studies, early studies in humans, controlled studies or large studies in humans. We show what the studies have found, with a source for every claim.

How often are the pages updated?

Every peptide page is reviewed at least once a year, and more often when new studies arrive. The date of the last update and fact check is shown on every page, and corrections are shown with a date.