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Five minutes. No science degree needed.
What's a peptide?
A short chain of amino acids, the same building blocks that make protein. Your body makes thousands of them. Insulin is one.
Why is everyone talking about them?
A few became huge medicines, like semaglutide for weight loss. That put a spotlight on dozens of others that are still experimental.
Are they legal?
Some are FDA-approved and need a prescription. Most of the ones sold online are not approved for people. Sellers label them "for research use only." The FDA has said that label does not protect a seller who is really selling to people.
What about supplements?
Things like NAC, CoQ10 and fish oil are sold over the counter. They are legal and easy to buy. That does not mean they are proven. We grade them the same way.
What's a stack?
Two or more compounds taken together for one goal. Stacks are popular. Studies on stacks barely exist.
What's the catch?
- Most of the proof for peptides comes from animals.
- What's in the vial or capsule may not match the label.
- We found no long-term studies.
How do I use this site?
Pick a goal. Read the grade before the hype. Use the stack builder to see what is known about each pair. Ask real people in the forum. Then talk to a doctor who knows your history.