Free: look up any of 52 peptides and see if it was tested in people.

What the science says about peptides, without the hype.

The free daily newsletter to learn what peptides do, see real results, and know what's actually been tested.

Free. One email a morning. Unsubscribe in one click.
  • Written for beginners
  • Skin, recovery, sleep, aging, focus, weight
  • Written by Mark, a real person
Mark at staateto me

Can a copper peptide cream really help wrinkles?

Good morning. Here's what's in today's email:

  • Morning noteWhy so many of you asked about skin this week
  • The main storyGHK-Cu: what it is and what the skin trials foundHuman study
  • Reader resultsWhat readers saw after a few weeks of using itReader report
  • Science roundupThree new studies, one sentence eachAnimal study
  • PollWhat should I explain next?

About 5 minutes to read

Written by MarkMark reads the studies and writes every email himself.
Every claim labeledHuman study, animal study or reader report, so you know what you are reading.
We read the actual studiesNot press releases or forum posts. Each claim links to its source.
Plain EnglishNo science background needed. If a word needs explaining, we explain it.

Start with the questions people ask most.

We read thousands of posts and comments from people curious about peptides. These came up again and again.

Explore by what you care about.

Each page lists the peptides people use for that goal and shows which ones were tested in people and which only in animals.

Tested in people Only tested in animals or cells so far Not sure where to start? Try the peptide finder

What's inside the daily email.

The same five parts every morning, so you always know where to look. I write it myself, and it takes about five minutes to read with your coffee.

Get the free email Free. Plain English. Unsubscribe in one click.
  1. 1 Morning noteA few lines from me on what caught my eye this week, and why it matters to you.
  2. 2 The main storyOne peptide or one question, explained start to finish: what it is, what people use it for and what the studies found.
  3. 3 Reader resultsWhat readers tell us happened when they tried something, labeled as a reader report so you know it is one person’s story.
  4. 4 Quick science roundupThree or four new studies in a sentence each, marked human study or animal study.
  5. 5 The pollOne quick question. You vote, and the results go in the next morning’s email.

Look up any peptide.

Of 52 peptides, 13 have strong human evidence, 16 have some human studies, 11 have early human data and 12 have only been tested in animals.

  • Strong human evidence13
  • Some human studies16
  • Early human data11
  • Animal studies only12
  • Banned in sport

Guides that start from zero.

See all eight guides

What the FDA changed for peptides in 2026.

Each change has its date and its source. The legal-status guide has the full timeline.

  1. July 23, 2026

    FDA advisers vote 8 to 6 on BPC-157

    The Pharmacy Compounding Advisory Committee recommended adding BPC-157 to the list of bulk substances pharmacies may compound from. The vote does not bind the FDA, and it does not make BPC-157 legal to compound.

    Source: trade press reports of the meeting What the vote does and does not change
  2. April 2026

    Five peptides leave Category 2

    FDA now lists BPC-157, TB-500, CJC-1295, KPV and MOTS-c as nominations that were withdrawn. GHRP-2, GHRP-6, ipamorelin, kisspeptin-10 and MK-677 remain in Category 2.

    Source: FDA, 503A Category 2 list Read the legal-status guide
  3. April 1, 2026

    First oral GLP-1 pill for weight loss approved

    The FDA approved orforglipron (Foundayo) for chronic weight management. It is a small molecule, not a peptide, and it is taken by mouth once a day.

    Source: FDA approval, reported by Healio See it in the GLP-1 guide
  4. February 6, 2026

    FDA moves against mass-marketed compounded GLP-1s

    The agency said it would restrict the GLP-1 ingredients used in mass-marketed compounded drugs. The semaglutide and tirzepatide shortages that allowed compounding ended in 2025.

    Source: FDA press release Compounding timeline

Mixing and measuring, worked out for you.

A vial labeled in mg, an amount written in mcg, a syringe marked in units. Most mixing mistakes start there. These calculators show the math step by step. They give numbers, not dosing advice.

Save the peptides you care about and keep private notes.

  • The doses used in studies. On 39 peptide pages: what each trial or approved label used, with the source. Reported, never recommended.
  • Saved peptides. Keep a short list and sort it by how well each was tested.
  • A private log. Notes and numbers over time, on a chart. Only you can see it.
Create a free account Sign in with your email. No password, no card. Same address as the daily email.

Sleep, bloodwork, supplements and more.

Order your own blood test and understand it here.

You can order many blood tests yourself, no doctor's note needed. The Lab Reader explains each number and links the studies behind it.

01

Test

Order your own labs. No referral needed, dozens of panels available direct-to-consumer.

02

Interpret

The Lab Reader explains every number in plain English, flags what's off, and links the studies on each one.

03

Act

The studies on each marker that is out of range, graded by evidence. Take them to your doctor.

Eight health topics beyond peptides.

Each topic has its own guides, calculators and the research behind them.

Why eight hours in bed can still leave you tired.

What each stage of sleep does, why you can wake up wrecked after a full night, and five changes that get you more deep sleep.

  • What deep and REM each repair, and how to protect them
  • The magnesium forms ranked by the actual evidence
  • Light, temperature, timing: the free levers first
  • Which sleep supplements have trial data, and which do not
Read the guide
Sleep stage hypnogram
Awake REM Light Deep 11pm 12am 1am 2am 3am 4am 5am 7am REM REM REM REM
Deep (N3) REM Light (N1/N2)

Read your own bloodwork.

Upload the PDF from your blood test. We explain every number in plain English, flag what is off, and show what the studies say about it. Then take it to your doctor.

Try the Lab Reader
panel.pdf · parsed 12 markers
Vitamin D22 ng/mLLow
Ferritin41 ng/mLIn range
Fasting glucose98 mg/dLHigh-normal
hs-CRP0.6 mg/LOptimal
Reviewed against 40+ biomarker reference ranges

Supplements, graded by the human trials behind them.

Magnesium, ashwagandha and the rest: what each is good for, the usual amounts, what it interacts with, and the source for each.

Compound Best for Evidence Typical dose
Magnesium glycinate Magnesium glycinate Sleep quality B 200–400 mg before bed
Ashwagandha Ashwagandha Stress & cortisol B 300–600 mg daily
L-Theanine L-Theanine Calm focus B 100–200 mg
Reishi Relaxation C 1–1.5 g extract
Apigenin Sleep onset C 50 mg

Calculators for sleep, protein and calories.

Put in your own numbers, like hours slept or body weight, and get an answer for you.

Why you can trust what you read here.

Every claim is labeled by what it was tested in: people, animals, or a reader's own report. Each claim links to the study or agency page it came from, and a second editor checks it before it goes up.

Every claim carries one of three labels
Human studyTested in people, in a published study or trial
Animal studyTested only in animals or cells so far
Reader reportOne person's experience, not a study
Supplement and compound grades
AStrong RCT evidence, multiple well-designed human trials
BPromising, limited or smaller trials, consistent findings
CEarly or mixed, animal data, observational, single trials
REFReference material, definitions, background, context
How we rate each peptide
Strong human evidenceAn approved drug, or tested in several large human trials.
Some human studiesTested in at least one proper human trial.
Early human dataOnly small human studies so far.
Animal studies onlyOnly tested in animals or cells so far.
Research
We read the studies themselves, plus the reviews that pool many studies.
Verify
Each claim is checked against the study's own numbers, not a news story about it.
Review
A second editor checks it before it goes up.
Cite
Every claim links to the study or agency page it came from.
100%Claims sourced
3Evidence labels
A–CGraded on human testing

Guides worth a slow read.

View all guides →
sleep · pillar 9 min

Why time in bed lies to you

Eight hours in bed does not equal eight hours of sleep. Here is what actually determines whether sleep restores you, and the levers you can pull to change it.

Grade B Read →
energy · guide ~8 min

The mitochondria playbook.

Creatine, CoQ10, and the lifestyle inputs that actually move the needle on daily energy.

Coming soon
focus · guide ~6 min

The attention stack.

What the research says about L-theanine, lion's mane, and the dopamine loops that wreck focus first.

Coming soon

Recent issues.

View all →
Frequently asked questions
What is a peptide?
A peptide is a short chain of amino acids, the same building blocks that make up protein. Your body makes thousands of them. Some are sold as powders you mix into coffee (collagen peptides), some go in skin creams (copper peptides), and some are prescription drugs, like the weight-loss drug semaglutide. Our beginner guide starts from zero.
Are peptides legal?
It depends on the peptide. Some are FDA-approved prescription drugs, such as semaglutide and tesamorelin. Others are approved only outside the US, some are still in clinical trials, and many are sold online as research chemicals that are not approved for people. Each peptide page says where it stands in the US and whether it is banned in sport.
Why are dose tables behind a free account?
The tables record the doses that published trials and approved labels used, with the source for each row. They are a record of research, not dosing advice, so we show them to signed-in readers alongside that context. The account is free and needs no card.
What do "strong human evidence" and "animal studies only" mean?
Each peptide gets one of four labels for how much it has been tested in people. Strong human evidence means an approved drug or several large human trials. Some human studies means at least one proper human trial. Early human data means small human studies only. Animal studies only means it has only been tested in animals or cells. The label is about how much testing exists; each page then says what the tests found.
Is this medical advice?
No. Staate explains published research for education. Decisions about starting, stopping or dosing any drug belong with a licensed clinician who knows your history.