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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

8 Best Peptides for Bodybuilding

People pursuing bodybuilding goals most often reach for a specific cluster of peptides spanning growth hormone secretagogues, direct IGF-1 analogues, myostatin inhibitors, and recovery compounds. This guide covers eight of those compounds, from the widely discussed CJC-1295 and Ipamorelin pairing to Follistatin 344 and BPC-157, laying out what each one is, how people actually use it for muscle growth and recovery, and where the evidence honestly stands. The compounds are numbered by how prominently each appears in research and documented real-world use, not ranked as recommendations of one being superior to another. The right choice depends on your goals, your situation, and what you build with a personalized plan.

Muscle Growth 14 min read

7 Best Peptides for Vitality

Vitality covers a wide range of overlapping goals, from cellular energy and physical recovery to sleep quality, hormonal balance, and longevity, and the field of peptides people actually use for those goals is correspondingly wide. This guide covers seven compounds that appear most prominently in research and real-world use for vitality in 2026, including growth hormone secretagogues like Sermorelin and CJC-1295 with Ipamorelin, mitochondrial compounds like MOTS-c and SS-31, and longevity-focused options like Epitalon. The entries are ordered by how prominently each compound appears in research and documented use, not ranked as a recommendation of one over another. The evidence varies considerably across this field, from prior FDA approval and functional medicine clinical data to animal-only studies and community-reported experience, and that variation is stated plainly for each entry.

Cellular Energy 10 min read

7 Best Peptides for Fatigue

People looking for peptides to address fatigue will find a surprisingly wide field, from mitochondria-targeting compounds like SS-31 and MOTS-c to growth-hormone-axis stacks, immune-modulating peptides, and NAD+ support strategies. This guide covers seven compounds people actually use or are actively discussing for fatigue, ranging from those with genuine phase-trial data to others whose evidence base is largely experiential. The compounds are ordered by how prominently each appears in research and real-world use, not ranked as recommendations, because the right match depends on the type of fatigue involved and factors the MyPeptidePal app is built to work through.

Cellular Energy 12 min read

6 Best Peptides for Energy

Six peptides and peptide-adjacent compounds show up consistently when people research cellular energy, fatigue reduction, and metabolic performance: SS-31 (Elamipretide), MOTS-c, CJC-1295 combined with Ipamorelin, NAD+, 5-Amino-1MQ, and Sermorelin. They are listed in order of how prominently each appears in research and real-world use, not as a ranking of one being better than another for your situation. The evidence picture across this field is genuinely mixed: SS-31 is the only compound here with FDA approval, though that approval covers a rare genetic condition rather than general fatigue, and most others rest on animal data, early human studies, or community-reported experience. The article states the evidence honestly for each entry so you can understand the landscape before deciding where to look next.

Cellular Energy 12 min read

6 Best Peptides for Vascularity

Vascularity is driven by low body fat, high muscle mass, and healthy blood vessel function, and the peptides people reach for to support it fall into two camps. The first group works directly on vascular biology: compounds like BPC-157 and TB-500 that stimulate new blood vessel formation or trigger the nitric oxide pathways responsible for dilation. The second group works indirectly through body composition: growth hormone secretagogues like CJC-1295, Ipamorelin, and MK-677 that reduce subcutaneous fat and increase muscle fullness, which in turn makes veins more visible. This guide covers six compounds people actively use or discuss for vascularity, ordered by how prominently each appears in research and real-world use, not as a ranking of one being better than another. The evidence base ranges from extensive animal studies to community-reported experience with little clinical backup, and that gap is named honestly inside each entry.

Body Composition 10 min read

7 Best Peptides for Lean Muscle Mass

Seven peptides come up consistently when people are researching lean muscle mass: CJC-1295, Ipamorelin, Tesamorelin, Follistatin-344, MK-677, IGF-1 LR3, and BPC-157. They work through two broad mechanisms, either stimulating the body's own growth hormone output or removing the biological limits on muscle growth directly, and the evidence behind them ranges from randomized controlled trials in clinical populations to user-reported experience with no published human data at all. The entries below are numbered by how prominently each compound appears in research and real-world use, not as a ranking of one being better than another for you. No peptide is FDA-approved specifically for building lean muscle in healthy adults, and the right compound for any one person depends on factors the MyPeptidePal app is built to assess.

Muscle Growth 12 min read

7 Best Peptides for Strength Gains

People pursuing strength gains through peptides are most often looking at compounds that work through the growth hormone and IGF-1 axis, either by triggering more GH release, extending those pulses, or bypassing the axis entirely and acting on muscle tissue directly. This guide covers seven compounds that people actually use or actively discuss for this goal, from the widely popular CJC-1295 and Ipamorelin stack to more experimental options like Follistatin 344. The entries are ordered by how prominently each compound appears in research and real-world use, not as a recommendation of one over another. The honest state of the evidence varies considerably across them, and the personalized decision belongs in the MyPeptidePal app, where your goals, history, and context shape an actual plan.

Sports Performance 11 min read

7 Best Peptides for REM Sleep

Seven peptides and peptide-adjacent compounds show up consistently when people go looking for ways to support REM sleep, ranging from DSIP and MK-677 to Pinealon, Epitalon, the CJC-1295 and Ipamorelin combination, Selank, and Thymalin. The evidence behind them varies considerably: MK-677 has the strongest controlled human trial data, DSIP has a mixed clinical record but the most community discussion, and several others rest almost entirely on user-reported experience. This guide walks through each compound in turn, covering what it is, how people use it for REM sleep, and what the evidence honestly shows. The compounds are ordered by how prominently they appear in the research and in real-world use, not ranked as one being better than another for any individual.

Sleep 12 min read

6 Best Peptides for Jet Lag

Jet lag disrupts sleep, clouds thinking, and derails performance after long-haul travel, and a growing community of frequent flyers, biohackers, and high-performance professionals has turned to peptides as part of their recovery toolkit. Six compounds show up consistently in community protocols and practitioner guides for this goal, ordered here by how prominently each appears in research and real-world use rather than as a recommendation of one over another. The evidence across the board is thin compared to melatonin, which holds the strongest human trial data for jet lag, and that context is stated honestly for every entry. DSIP and Epitalon are the anchors of most peptide-based approaches, targeting broken sleep and the upstream circadian clock respectively, while the remaining four address the cognitive, hormonal, immune, and metabolic dimensions of the same problem.

Circadian Health 10 min read

6 Best Peptides for Circadian Rhythm

Six peptides have built real followings among people trying to support, reset, or restore their circadian rhythm, ranging from Epitalon, which has genuine human clinical trial data on melatonin modulation and clock gene amplitude, to compounds like Pinealon and Selank whose use rests largely on community-reported experience and plausible mechanisms. This guide covers the field honestly: what each compound is, how people use it for circadian rhythm support, and where the evidence actually stands. The entries are ordered by how prominently each compound appears in research and real-world use, not as a verdict on which one is right for any individual, and the personalized decision belongs in the app.

Circadian Health 12 min read

5 Best Peptides for Deep Sleep

People pursuing deeper, more restorative sleep most often look at a handful of peptides, each working through a different mechanism: DSIP targets slow-wave brain oscillations directly, Epitalon restores circadian melatonin in aging users, the CJC-1295 and Ipamorelin combination amplifies the overnight growth hormone pulse that physiologically drives deep sleep, and Selank addresses the anxiety-driven hyperarousal that prevents sleep onset. This guide covers five compounds people genuinely use or actively discuss for deep sleep, with each one's evidence stated honestly, from small dated human trials to largely community-reported experience. 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 the personalized decision belongs in the MyPeptidePal app.

Sleep 12 min read

5 Best Peptides for Hypoactive Sexual Desire Disorder (HSDD)

A small but meaningful set of peptides has emerged as the primary compounds people reach for when addressing Hypoactive Sexual Desire Disorder, ranging from PT-141 (bremelanotide), the only peptide with FDA approval for this condition, to investigational options like Kisspeptin-10 and Orenetide that have early clinical data behind them, to adjunct and community-discussed compounds where the picture is more mixed. This guide covers five peptides people actually use or are actively discussing for HSDD, with each compound's evidence stated honestly in plain language. 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 a conversation with a qualified provider, not in a listicle.

Libido 12 min read

6 Best Peptides for Low Sperm Count

Low sperm count sits at the intersection of hormonal signaling, testicular blood flow, and cellular health, which means the peptides people reach for depend heavily on what is driving the problem. Six compounds show up consistently in research and community discussion for this goal: HCG and Gonadorelin carry FDA approval for specific fertility indications and decades of clinical use; Kisspeptin-10 has Phase 2 randomized trial data for hormonal causes; BPC-157 has the most direct human data among research-only compounds; TB-500 is used alongside BPC-157 for vascular support; and Testagen rounds out the list as a testicular peptide bioregulator with community interest and limited published evidence. The entries are ordered by how prominently each compound appears in research and real-world use for this goal, not as a recommendation of one over another, because the right starting point depends entirely on your situation.

Fertility 11 min read

4 Best Peptides for Peyronie's Disease

Peyronie's Disease is a well-understood fibrotic condition with a clear disease mechanism, but the peptide options people discuss for it sit almost entirely in preclinical and community-reported territory, with no human clinical trial data behind any of them as of 2026. Four compounds appear consistently in the conversation: BPC-157, TB-500, GHK-Cu, and serrapeptase. They are ordered here by how prominently each shows up in research and real-world use, not as a recommendation of one over another. The honest summary is that the theoretical rationale for several of these is scientifically coherent, and the real-world experience reported by people who have tried them for this specific condition is largely discouraging.

Mens Health 9 min read

7 Best Peptides for Enlarged Prostate (BPH)

Seven peptides have entered the real conversation around benign prostatic hyperplasia, ranging from GV1001, which has completed Phase 2 and Phase 3 human trials, to prostate-specific bioregulators from the Khavinson research tradition, to compounds like RC-3940-II and BPC-157 that people discuss based on preclinical data or general anti-inflammatory profiles. No peptide has received FDA or EMA approval for BPH, and the evidence across this field varies sharply, from genuine published trial data to purely community-reported use with no clinical record. The entries below are ordered by how prominently each compound appears in the research and in documented real-world use, not as a recommendation of one over another, and the goal is to give you an honest map of what people are actually using so you can take the next step toward a plan that fits your situation.

Mens Health 11 min read