Studies
STACKD roundups synthesize the research so you don't start by drowning in tabs. Each one is a plain-language summary of what was studied, what it suggests, and where it falls short—with the primary sources cited at the bottom for your own diligence.
STACKD summary
Stronger clinical signalIncretin metabolic peptides: what the trials actually show
A STACKD synthesis of the GLP-1 / GIP / glucagon class most people mean by “metabolic peptides.”
SemaglutideTirzepatideRetatrutideFat loss · Metabolic · 6 sources
STACKD summary
EmergingSoft-tissue recovery peptides: BPC-157 and TB-500
Why the online enthusiasm runs well ahead of the human evidence.
BPC-157TB-500Recovery · Skin / repair · 4 sources
STACKD summary
Limited human dataGH-axis secretagogues: CJC-1295 and ipamorelin
What's actually measured (GH pulses) vs. what's usually claimed (physique).
CJC-1295IpamorelinMuscle / GH axis · Recovery · Sleep / recovery adjunct · 2 sources
STACKD summary
Stronger clinical signalTesamorelin and visceral fat
An approved GHRH analogue—but studied in a very specific population.
TesamorelinFat loss · Muscle / GH axis · Metabolic · 2 sources
STACKD summary
Limited human dataSemax, Selank, and Noopept: the Russian nootropic peptides
Decades of domestic clinical use, but almost no independent international replication.
SemaxSelankNoopeptCognitive / nootropic · Mood / anxiety · Neuroprotection · 5 sources
STACKD summary
EmergingMOTS-c: a mitochondrial peptide, mostly in mice
Compelling metabolic biology with a large mouse-to-human gap.
MOTS-cMetabolic · Fat loss · Recovery · 1 source
STACKD summary
Limited human dataGHK-Cu and skin remodeling
Topical skin research is the strong part—injectable claims are not.
GHK-CuSkin / repair · Recovery · 1 source
STACKD summary
Limited human dataAOD-9604: an old GH-fragment idea
Early fat-metabolism research that modern therapeutics have outrun.
AOD-9604Fat loss · 1 source
STACKD summary
EmergingEpitalon and longevity claims
Historical, largely preclinical, and short on modern replication.
EpitalonSleep / recovery adjunct · Recovery · 1 source