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, functional medicine researcher, data analyst, peptide specialist

, functional medicine researcher, data analyst, peptide specialist , functional medicine researcher, data analyst, peptide specialist

Marcus Reid is a functional medicine researcher, data analyst, and peptide specialist, and one of the people who built MyPeptidePal. The platform exists in part because of the years he spent immersed in clinical literature, real-world protocols, and the kind of hands-on experimentation that most textbooks skip entirely. He is not a physician and does not pretend to be. What he is, is someone who has done the work to understand how these compounds actually function at a biological level, what the research actually says versus what the forums claim, and how to explain it in a way that makes sense to anyone willing to learn. At MPP, Marcus contributed to building the knowledge base, the protocol frameworks, and the research systems that power the platform. His work covers tissue repair, metabolic health, hormonal optimization, longevity, cognitive function, and cosmetic applications. When the science gets complicated, his job is to make it click.

Articles by , functional medicine researcher, data analyst, peptide specialist

5 Best Peptides for Gut Health

Five peptides consistently come up when people research gut health: BPC-157, KPV, larazotide acetate, GHK-Cu, and TB-500. They work through different pathways, ranging from tightening the intestinal barrier to reducing inflammatory signaling to supporting connective tissue repair in the gut lining, and the evidence behind them spans the full spectrum from completed human clinical trials to purely animal-model research to user-reported experience with no controlled data at all. This guide walks through each one honestly: what it is, how people use it for gut health, and where the science actually stands. The compounds are numbered by how prominently each appears in the research and in real-world use, not as a ranking of one being better than another for every person. Turning that overview into a personalized plan is what MyPeptidePal does.

Gut Health 10 min read

6 Best Peptides for Growth Hormone Optimization

Six peptide compounds are in active use for growth hormone optimization in 2026, ranging from the only FDA-approved option backed by published randomized controlled trials to widely prescribed stacks that have essentially no formal human evidence for this purpose. This guide covers each one in turn: what it is, how people use it for GH optimization, and what the evidence honestly shows. The entries are ordered by how prominently each compound appears in the research and in real-world use, not as a recommendation of one over another. Tesamorelin sits at the top because it has the strongest evidence base; the CJC-1295 and Ipamorelin stack follows because it is the most widely prescribed combination in practice. The personalized decision belongs in the MyPeptidePal app.

Growth Hormone Optimization 10 min read

7 Best Peptides for Fat Oxidation

Seven peptides stand out when people research fat oxidation in 2026, spanning FDA-approved GLP-1 medications with robust trial data, investigational triple agonists driving genuine cellular fat burning, and research-only compounds that act directly on lipolysis and mitochondrial pathways. The list runs from tirzepatide and semaglutide through retatrutide, AOD-9604, HGH Fragment 176-191, MOTS-c, and the CJC-1295 and ipamorelin combination, ordered by how prominently each appears in research and real-world use, not as a recommendation of one over another. The evidence differs sharply across these compounds, from large randomized controlled trials to animal models and community-reported experience, and each entry states that honestly. Turning this map of options into a personalized plan is what the MyPeptidePal app is built to do.

Fat Oxidation 12 min read

7 Best Peptides for Eye Health

Peptide research for eye health covers a wider and more active field than most people expect, with several compounds now in human clinical trials for conditions like age-related macular degeneration and dry eye, alongside a separate group of well-known peptides including BPC-157, Epithalon, and GHK-Cu that biohackers use off-label for retinal support and visual function. This guide covers seven compounds people are using or actively discussing for eye health, from the most clinically advanced to the most community-driven, with an honest account of where the evidence stands for each. The compounds are ordered by how prominently each appears in published research and real-world use, not ranked as recommendations, and the right choice for any individual depends on their specific condition, situation, and goals.

Eye Health 11 min read

6 Best Peptides for Epigenetics

Six peptides appear most prominently in the research and in real-world use for epigenetic modulation, ranging from a fully FDA-approved HDAC inhibitor used in oncology to a soy-derived polypeptide available as a dietary supplement to research-grade longevity compounds whose evidence is almost entirely community-reported. The field as a whole is largely pre-clinical, no peptide has been approved specifically for epigenetic purposes in healthy humans, and the evidence base varies sharply from one compound to the next. The list is ordered by how prominently each appears in published research and documented use, not as a ranking of one over another, and the personalized decision of which fits your situation is exactly what the MyPeptidePal app is built to help you work through.

Epigenetics 10 min read

6 Best Peptides for Diabetes

Six peptides dominate the conversation when people search for diabetes management options in 2026, and they span a wide range of evidence: from FDA-approved GLP-1 receptor agonists backed by large-scale randomized controlled trials to investigational compounds still working through Phase 2 data and small-scale human trials. This guide covers each one honestly, stating what it is, how people use it for diabetes, and what the evidence actually shows. The compounds are ordered by how prominently each appears in the research and in real-world use, not ranked as a recommendation of one over another, because the right choice depends entirely on whether someone has Type 1 or Type 2 diabetes, what else they are managing, and what a qualified clinician recommends.

Diabetes 10 min read

6 Best Peptides for Depression

Six peptides show up consistently in the conversation around depression, ranging from Selank and Semax, which have real clinical history and the most published human data in this category, to BPC-157 and GLP-1 receptor agonists, whose mood-related use is either anecdotal or genuinely complicated. No peptide is FDA-approved for depression as of 2026, and human trial data is thin across the board, though the evidence picture varies considerably from one compound to the next. The compounds in this guide are ordered by how prominently each appears in research and real-world use, not as a recommendation of one over another, and the right choice depends on individual factors that a personalized plan handles better than a list.

Depression 10 min read

6 Best Peptides for Cognitive Enhancement

Six peptides stand out in the cognitive enhancement conversation in 2026, ranging from Semax, which has more published human data and broader community use than any other compound in this field, to Dihexa, a high-potency research compound with compelling animal-model results and no published human trials. This guide covers each one honestly: what it is, how people use it for cognitive goals, and where the evidence actually stands. The compounds appear in order of how prominently each shows up in research and real-world use, not as a ranking of one over another. The right compound for your specific situation is a personalized decision that belongs in the MyPeptidePal app, not on a listicle.

Cognitive Enhancement 11 min read

7 Best Peptides for Mitochondrial Health

Seven peptides stand out as the compounds people actually use and discuss for mitochondrial health in 2026, ranging from SS-31 (elamipretide), the only mitochondrial peptide to have received FDA approval, to MOTS-c, Humanin, 5-Amino-1MQ, Epitalon, GHK-Cu, and the investigational SHLP family. The evidence behind them varies considerably: SS-31 has completed human clinical trials and earned FDA accelerated approval for Barth syndrome, while most of the others rest primarily on animal research, mechanistic data, and community-reported use. The entries below are ordered by how prominently each compound appears in published research and real-world use, not as a ranked recommendation of one over another, and the personalized decision belongs in the app, not in a list.

Mitochondrial Health 11 min read

7 Best Peptides for Cardiovascular Health

Seven peptides show up consistently when people research or discuss cardiovascular health support in 2026, ranging from semaglutide, which carries a formal FDA approval for reducing major cardiovascular events in people with established heart disease and obesity, to research compounds like BPC-157, SS-31, and Epitalon that are used in functional medicine and longevity protocols with varying degrees of human evidence behind them. The compounds are listed by how prominently each appears in the research literature and documented real-world use, not as a ranking of one option over another. For some entries the evidence is a large randomized controlled trial; for others it is animal research and community-reported experience, and knowing which is which is exactly what this guide is here to clarify.

Cardiovascular Health 11 min read

7 Best Peptides for Cancer

The peptide-and-cancer landscape covers more ground than most lists acknowledge: some peptides are FDA-approved standards of care for specific tumor types, others are in active clinical trials showing early but real promise, and a smaller group exists at the research and community-use tier where evidence is limited and risks for active cancer patients deserve honest treatment. This guide covers seven compounds that appear most prominently in research and real-world discussion for cancer-related goals, ordered by how prominently each appears in that conversation, not as a recommendation of one over another. The right compound for any individual depends entirely on their diagnosis, treatment stage, and clinical situation, and that decision belongs with an oncologist.

Cancer 11 min read

7 Best Peptides for Bone & Joint Health

People pursuing bone and joint health through peptides are working across a wider field than most guides cover. On one end sit FDA-approved prescription compounds like teriparatide and abaloparatide, the only peptides with randomized controlled trial evidence for actually building new bone mass. On the other end are investigational compounds like BPC-157 and TB-500, which carry no human clinical trial data for orthopedic use but appear constantly in community protocols for tendon, cartilage, and soft tissue recovery. Bridging the two are hydrolyzed collagen peptides and undenatured type II collagen, the most widely used options for daily joint support, backed by multiple controlled human studies. This guide covers the peptides people actually reach for across all three categories, with the evidence stated honestly for each. The entries are ordered by how prominently each compound appears in research and real-world use, not as a recommendation of one over another.

Bone Joint Health 12 min read

7 Best Peptides for Body Composition

People pursuing better body composition have a wider field of peptides to consider than most guides acknowledge. This article covers the seven compounds people actually use and discuss for this goal in 2026, ranging from GLP-1 agonists backed by gold-standard clinical trial data to growth hormone secretagogues with a more limited human evidence base, plus a recovery compound that shows up consistently in training-focused protocols. The list is ordered by how prominently each compound appears in research and real-world use, not as a recommendation of one over another, because whether fat loss, muscle gain, or recomposition is the primary target changes everything about which compound makes sense. That personalized decision is what the MyPeptidePal app is built to work through.

Body Composition 11 min read

7 Best Peptides for Appetite

People looking for peptides to manage appetite in 2026 are working in one of the most active and well-studied corners of the entire field. The landscape runs from FDA-approved GLP-1 receptor agonists with large randomized controlled trial evidence behind them, to investigational triple-agonist compounds producing striking Phase 2 results, to a research-chemical option for the smaller group trying to stimulate rather than suppress appetite. This guide covers seven peptides people are genuinely using or actively discussing for appetite control, ordered by how prominently each appears in research and real-world use, not as a recommendation of one over another. Tirzepatide and semaglutide anchor the list with the deepest clinical records, while compounds like retatrutide and eloralintide represent where the field is heading.

Appetite 11 min read

6 Best Peptides for Anxiety

Six peptides come up consistently when people research anxiety relief: Selank, Semax, Oxytocin, BPC-157, KPV, and DSIP. Each targets a different biological driver of anxiety, from GABA signaling and amygdala reactivity to gut inflammation and disrupted sleep, which is why the field looks more complicated than a single best-peptide answer would suggest. This guide covers all six in order of how prominently each appears in research and real-world use, not as a ranking of one over another, and states the evidence picture plainly for each so you can weigh the options yourself.

Anxiety 12 min read