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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

6 Best Peptides for Autophagy

Six compounds come up most often when people look for peptides to support autophagy: spermidine, which has the strongest human-relevant evidence of the group; Epitalon and MOTS-c, which are widely used in longevity circles despite limited human trial data; Tat-Beclin 1, the most mechanistically precise tool in the field but available for research only; Humanin, a mitochondria-derived peptide in early-stage discussion; and GLP-1 receptor agonists, FDA-approved metabolic peptides with an indirect autophagy connection. They are ordered by how prominently each appears in research and documented real-world use, not ranked as recommendations, and the right compound for any individual depends on details that belong inside a personalized plan rather than a public list.

Longevity 12 min read

6 Best Peptides for Cellular Senescence

Six peptides stand out as the compounds people actually use and discuss for cellular senescence in 2026, ranging from Peptide 14 (OS-01), the only one backed by a completed pilot clinical trial targeting senescent skin cells, to FOXO4-DRI, a research-stage senolytic with animal data but no published human safety evidence. The field splits between senolytics, compounds designed to kill senescent cells, and senomorphics, which suppress the harmful inflammatory signals those cells emit without eliminating them. These six are ordered by how prominently each appears in research and real-world use, not as a recommendation of one over another, and the honest state of the evidence varies dramatically across the list.

Longevity 11 min read

7 Best Peptides for Water Retention

Water retention and peptides have a more complicated relationship than most guides acknowledge. Several peptides, particularly those that stimulate growth hormone release, are among the most consistent causes of fluid buildup in people using them for body composition and anti-aging goals. Others, including the FDA-approved GLP-1 agonists, show minimal fluid retention in clinical trials, and some user communities report they actively reduce it. AOD-9604 sits in its own category, engineered specifically to deliver fat-burning activity without triggering the GH-driven pathway that causes retention in the first place. This guide covers seven compounds people actually use and discuss in relation to water retention, ordered by how prominently each appears in research and real-world discussion around this topic, not as a ranking of which one is right for any individual.

Kidney Health 11 min read

6 Best Peptides for Fatty Liver (NAFLD)

Fatty liver disease (NAFLD) has become one of the most actively researched conditions in peptide medicine, and the field spans a wider range of compounds than most people expect, from FDA-approved GLP-1 receptor agonists with biopsy-confirmed human trial data to research peptides whose use is largely community-reported. This guide covers six compounds people actually use or discuss for NAFLD, ordered by how prominently each appears in the research and in real-world use, not as a recommendation of one compound over another. Semaglutide now carries an FDA approval specifically for advanced fatty liver disease, but the entries that follow lay out what each compound is, how it is used for this condition, and where its evidence honestly stands.

Liver Health 11 min read

6 Best Peptides for Cholesterol Management

People researching peptides for cholesterol management will find a genuinely wide field, ranging from fully FDA-approved GLP-1 receptor agonists backed by large clinical trials to investigational drugs still working through Phase 3 approval, to research-stage compounds whose evidence rests on preclinical data and community-reported use. This guide covers six peptides that appear most consistently across published research, clinical practice, and community discussion for this goal: semaglutide, tirzepatide, tesamorelin, enlicitide, MOTS-c, and Vesugen. They are ordered by how prominently each shows up in the research and in real-world use for cholesterol management, not ranked as a recommendation of one over another, and the personalized decision belongs with a qualified provider and the MyPeptidePal app.

Cardiovascular Health 10 min read

6 Best Peptides for Belly Fat

People pursuing belly fat reduction through peptides are working with a varied field, from FDA-approved GLP-1 medications with large clinical trial records to growth hormone-based compounds used in functional medicine settings and research-only peptides discussed in community protocols. This guide covers six compounds people actually use or are actively discussing for this goal, what each one is, how it approaches belly fat, and what the evidence honestly shows. The entries are ordered by how prominently each compound appears in research and documented real-world use, not as a recommendation of one over another, and the personalized decision belongs in the hands of you and your healthcare provider, with MyPeptidePal built to help map the options into a concrete plan.

Fat Oxidation 11 min read

6 Best Peptides for Visceral Fat

Visceral fat, the deep abdominal fat that surrounds internal organs, responds to a distinct set of peptides, and the field spans a wide range of evidence: from a single FDA-approved compound with Phase 3 randomized controlled trial data all the way to research-only options whose human evidence is thin or still accumulating. This guide covers six peptides people actually use or are actively discussing for visceral fat reduction: Tesamorelin, Tirzepatide, Semaglutide, Retatrutide, AOD-9604, and MOTS-c. They are ordered by how prominently each appears in research and documented real-world use, not as a ranking of one being better than another for any individual. The right compound depends on your specific situation, and that personalized decision is what the MyPeptidePal app is built to help you work through.

Fat Oxidation 11 min read

5 Best Peptides for Sugar Cravings

Five peptide-based compounds stand out as the options people most actively use and discuss for reducing sugar cravings in 2026, ranging from FDA-approved GLP-1 receptor agonists available through a prescriber or telehealth platform to investigational compounds still working through clinical trials. The list is ordered by how prominently each compound appears in published research and real-world use for this goal, not as a recommendation of one over another. What these compounds share is an ability to act on the biological machinery behind sugar cravings: the brain's reward circuitry, hunger-signaling hormones, and the blood glucose swings that keep the craving cycle running. Tirzepatide and semaglutide anchor the field with the deepest evidence, while retatrutide, liraglutide, and cagrilintide round out the picture each from a distinct angle.

Appetite 10 min read

5 Best Peptides for Food Cravings

Five peptides dominate the conversation around food cravings and the phenomenon users call "food noise": tirzepatide, semaglutide, liraglutide, cagrilintide, and retatrutide. The first three are FDA-approved and backed by published human trials; the last two are investigational compounds with genuine early data and active community discussion. This guide covers all five honestly, explaining what each one is, how people use it for cravings, and where the evidence actually stands. The compounds are ordered by how prominently each appears in clinical research and real-world use, not ranked as a personal recommendation, and the personalized decision belongs in the hands of a prescribing clinician and the MyPeptidePal app.

Appetite 10 min read

6 Best Peptides for Metabolic Syndrome

Six peptides stand out in the research and real-world conversation around metabolic syndrome, ranging from FDA-approved incretin agonists with robust randomized controlled trial data to research-stage compounds whose mechanisms are well-described but whose human evidence is still emerging. Tirzepatide and semaglutide lead the field on clinical evidence, while MOTS-c, 5-Amino-1MQ, tesamorelin, and retatrutide each address distinct pieces of the syndrome through genuinely different pathways. The compounds here are ordered by how prominently each appears in published research and real-world use, not as a recommendation of one over another, and the personalized decision belongs in a conversation with a qualified provider and, when you are ready to map your options, inside the MyPeptidePal app.

Metabolic Health 10 min read

6 Best Peptides for Type 1 Diabetes

People managing Type 1 Diabetes look at a wider range of peptides than most guides cover, from the one FDA-approved peptide adjunct to off-label GLP-1 medications, experimental immunotherapy candidates, and research compounds used in community protocols. This guide covers six compounds that come up repeatedly in the research and in real-world T1D discussions, ordered by how prominently each appears in clinical evidence and documented use, not ranked as a recommendation of one over another. The evidence is honestly mixed: some have human trial data, some rest on animal models, and some are community-reported with no clinical validation behind them. The right fit depends on where you are in your T1D journey, what you are managing for, and what you build with a personalized plan.

Diabetes 10 min read

6 Best Peptides for Type 2 Diabetes

Six peptide-based compounds stand out for Type 2 Diabetes in 2026, ranging from FDA-approved medications with deep Phase 3 trial programs to investigational dual and triple agonists still working through clinical development. The field is built around GLP-1 receptor agonists, a class of synthetic peptides that lower blood sugar by stimulating insulin release, slowing digestion, and reducing appetite. Tirzepatide and semaglutide anchor the approved end of the list; retatrutide, survodutide, and mazdutide represent the investigational wave generating the most active discussion. The entries are ordered by how prominently each compound appears in research and real-world use, not as a recommendation of one over another, and personalized guidance on which one fits your situation belongs in the MyPeptidePal app.

Diabetes 11 min read

5 Best Peptides for Prediabetes

Five peptides come up consistently when people research prediabetes: semaglutide and tirzepatide lead the conversation because they have the most substantial clinical trial backing, liraglutide rounds out the established GLP-1 class with the longest track record, MOTS-c represents a genuinely distinct and actively investigated mechanism, and AOD 9604 appears in discussions about the visceral fat side of the problem. This guide covers all five, ordered by how prominently each appears in the research and in real-world use, not as a ranking of one being better than another for your situation. No compound here is FDA-approved specifically for prediabetes; every one of them is used off-label or is still investigational, and the evidence for each is described honestly rather than dressed up.

Metabolic Health 9 min read

7 Best Peptides for Blood Sugar Control

Blood sugar control is one of the most peptide-rich areas in metabolic health, spanning FDA-approved prescription drugs with years of trial data all the way to research-stage mitochondrial peptides still working through animal models. This guide covers seven compounds people actually use or are actively discussing for this goal, from well-evidenced GLP-1 receptor agonists like semaglutide and tirzepatide to early-research options like MOTS-c and Pancragen. 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, and the honest state of the evidence is described plainly for each.

Metabolic Health 12 min read

6 Best Peptides for Insulin Sensitivity

Six peptides and peptide-adjacent compounds appear consistently in the research, clinical practice, and community discussion around insulin sensitivity: tirzepatide and semaglutide, both FDA-approved with extensive phase 3 trial data; tesamorelin, with two randomized controlled trials supporting its use for visceral and hepatic fat; and three investigational options, MOTS-c, humanin, and 5-Amino-1MQ, whose evidence currently sits at the preclinical and early-research stage. The entries are ordered by how prominently each appears in research and documented real-world use, not as a recommendation of one compound over another. Choosing the right option depends on your specific metabolic picture, and turning this overview into a personalized plan is what the MyPeptidePal app is built to do.

Metabolic Health 12 min read