WWhichPep
Decision guidesComparisonsQuality checks

WhichPep decision library

Peptide decision library.

Simple answers for recovery, fat loss, healing, sleep, focus, skin, and longevity. Compare the main options, understand the difference, and know what to click next.

Compare BPC-157 vs TB-500 Read beginner guide

Start by goal

Peptide categories

Start with the outcome you care about. Each category points you toward the names worth comparing first.

Recovery

BPC-157 / TB-500 / GHK-Cu

Compare BPC-157 for localized recovery, TB-500 for broader recovery, and GHK-Cu for skin and tissue quality.

Healing

BPC-157 / TB-500 / KPV

Start with BPC-157 vs TB-500. Add KPV when the question moves toward inflammation-adjacent topics.

Weight loss

CJC-1295 / Ipamorelin / AOD-9604 / Tesamorelin

Compare CJC-1295 / Ipamorelin, AOD-9604, Tesamorelin, and GLP-1-related options before clicking through.

Sleep

DSIP / Selank / Semax

Start with DSIP for sleep. Compare Selank and Semax when stress and focus overlap.

Focus

Selank / Semax / MOTS-c

Compare Selank and Semax first. Add MOTS-c when the question moves toward energy and mitochondria.

Skin

GHK-Cu / BPC-157 / KPV

Start with GHK-Cu for skin. Compare BPC-157 and KPV when the question moves toward tissue support.

Core references

Start with these four.

If you only learn four names first, make them BPC-157, TB-500, Retatrutide, and NAD+. They cover the biggest decision paths: recovery, broader healing, fat loss, and longevity.

Recovery

BPC-157

Choose BPC-157 if you’re comparing localized recovery support: tendons, ligaments, soft tissue, and gut-related references.

  • Often compared with TB-500.
  • Commonly discussed around recovery, healing, and soft-tissue support.
  • Quality checks matter: COA, batch number, identity testing, and careful claims.
Compare BPC-157 vs TB-500
Recovery

TB-500

Choose TB-500 if you’re comparing broader recovery and mobility support instead of one localized area.

  • Usually compared against BPC-157.
  • Commonly discussed around mobility, recovery, and tissue remodeling.
  • Often appears alongside BPC-157 in comparison and combination pages.
Read the comparison
Weight loss

Retatrutide / Reta

Choose the Retatrutide guide if you’re comparing Reta against Semaglutide or Tirzepatide for body-composition discussions.

  • Common comparison terms include Reta, Retatrutide, Reta vs Tirz, and Reta vs Sema.
  • Often described as a triple agonist topic.
  • Careful language matters because it is still investigational.
Read Retatrutide guide
Longevity

NAD+

Choose the NAD+ guide if you’re comparing longevity and cellular-energy options like NAD+, NADH, NMN, NR, capsules, injections, and clinic-style offerings.

  • Common comparison terms include NAD+, NADH, NAD vs NMN, and NAD vs NR.
  • Connected to cellular energy and redox biology.
  • Not a peptide, but closely related to longevity and biohacking research habits.
Read NAD+ guide

Comparison map

Quick comparisons.

Use these as shortcuts when you already know the goal but not the right comparison.

RecoveryBPC-157, TB-500, GHK-Cu
BPC-157 vs TB-500Localized tissue support vs broader recovery
Retatrutide vs TirzepatideRetatrutide vs Tirzepatide
NAD+ vs NMNLongevity and cellular-energy comparison

Popular guides

Popular guides

Short pages that answer the decision quickly and point to the next comparison.

BPC-157 vs TB-500

Clear side-by-side guide to the two most compared recovery peptides.

Best peptide for recovery

The main recovery category: BPC-157, TB-500, GHK-Cu, and what each one is known for.

Best peptide for fat loss

The main body-composition category: CJC-1295 / Ipamorelin, AOD-9604, and Tesamorelin.

What are peptides?

A short beginner explanation before comparing specific peptides.

Product directory

A clean directory of peptide product listings organized by category.

Fast answers

Quick decisions.

Use these short answers when you need the next click, not a lecture.

BPC-157 or TB-500?

Pick BPC-157 if the comparison is localized recovery. Pick TB-500 if the comparison is broader recovery and mobility.

Read BPC vs TB

Retatrutide, Tirzepatide, or Semaglutide?

Retatrutide is the investigational triple-agonist topic. Tirzepatide and Semaglutide are the better-known comparison anchors.

Read Retatrutide guide

NAD+ or NMN?

NAD+ is the coenzyme. NMN and NR are precursor topics. Start with NAD+ if you want the category overview.

Read NAD+ guide

What should I check before clicking?

Look for a batch-specific COA, clear label, identity testing, and no miracle claims. If those are missing, slow down.

Read quality checklist

Quality checklist

Before clicking through, check the basics.

Before clicking through, check for batch-specific testing, readable COAs, clear labeling, and careful claims.

Read quality checklistView product directory
  • Batch-specific COA
  • Readable lab name and test date
  • Identity and purity testing
  • Clear product labeling
  • Research-only language
  • No cure or miracle claims