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Best Peptides For, homeEvidence guides, by goal

Best peptides for your goal

Pick a goal. We show what’s been tested, in whom, and what the FDA has actually approved.

Goals

  1. Long vertical bands of plant cells in plum and peach tones.
    A squash stem under a microscope. Illustration only; it has nothing to do with peptide research. Berkshire Community College Bioscience Image Library, CC0, edited.

    Cognitive function

    Guide

  2. A thin band of plant cells with a rounded bulge below it, in plum and peach tones.
    A water lily leaf under a microscope. Illustration only; it has nothing to do with peptide research. Berkshire Community College Bioscience Image Library, CC0, edited.

    Hair growth

    Guide

  3. Long, wavy parallel bands of fibers in plum and peach tones.
    Dense connective tissue, the kind tendons are made of, under a microscope. Illustration only; not from a study in our guides. Echinaceapallida, CC BY-SA 4.0, edited.

    Injury recovery

    Guide

  4. Scattered pale oval cells in a smooth band, in plum and peach tones.
    Hyaline cartilage, the kind that lines joints, under a microscope. Illustration only; not from a study in this guide. Berkshire Community College Bioscience Image Library, CC0, edited.

    Joint pain

    Guide

  5. Thin radial lines of plant cells fanning across a pine stem in plum and peach tones.
    A pine stem under a microscope. Illustration only; it has nothing to do with peptide research. Theofilus Christian, CC BY-SA 4.0, edited.

    Longevity

    Guide

  6. Parallel striped muscle fibers in plum and peach tones.
    Skeletal muscle fibers under a microscope, from a college image library. Illustration only; not from a study in our guides. Berkshire Community College Bioscience Image Library, CC0, edited.

    Muscle growth

    Guide

  7. Wavy layers of skin cells in plum and peach tones.
    The outer layers of skin under a microscope. Illustration only; not from a study in our guides. Kilbad and Mikael Häggström, CC0, edited.

    Skin aging

    Guide

  8. A honeycomb of rounded cells in plum and peach tones.
    Fat tissue under a microscope, from a college image library. Illustration only; not from a study in our guides. Berkshire Community College Bioscience Image Library, CC0, edited.

    Weight loss

    Guide

All goals, A to Z

What “best” means here

Best means best evidence, not safe or right for you. A peptide shown to help in controlled human trials ranks above one tested only in animals, whatever the marketing says. Any commercial relationship is disclosed next to the content it touches.

Read our full criteria

  1. Human trialsControlled trials in people, published in a journal, that tested a clinical outcome and showed a benefit. The strongest kind of evidence we report.
  2. Limited human dataSmall, short or inconclusive human studies, including observational studies, uncontrolled trials and controlled trials that did not show a clinical benefit.
  3. Animal studiesResults in animals often don’t carry over to people.
  4. Lab studiesCells or tissue in a dish. An early signal, not an answer.

Recently updated guides

Peptide guide

Bremelanotide: One Approved Use, a Modest Effect

Bremelanotide (Vyleesi) is FDA-approved only for premenopausal women with acquired, generalized HSDD. What trials showed, the risks and what isn't proven.

FDA-approved

Updated

Compare two peptides

Same questions, side by side: approval status, type of evidence, and what isn’t known.

Comparisons

  1. BPC-157 vs TB-500: What the Evidence Shows
  2. Semaglutide vs Tirzepatide: What Head-to-Head Data Show
  3. Tirzepatide vs Retatrutide: Approved vs Investigational

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