Peptide Applications

6 Best Peptides for Dementia

Six peptides come up consistently when people research cognitive support for dementia: Cerebrolysin, Semax, Cortexin, Dihexa, Pinealon, and P21. They range from compounds with genuine human trial data used clinically in parts of Europe and Asia to research chemicals whose evidence base is entirely animal models or community-reported experience. None is FDA-approved for dementia, and none replaces evaluated medical care. This guide covers each one in plain language, what it is, how people use it for dementia, and what the evidence actually shows. The compounds are numbered by how prominently each appears in research and real-world use, not ranked as personal recommendations, and turning any of these options into a personalized plan is exactly what the MyPeptidePal app is built to do.

Neurodegenerative Diseases 10 min read

7 Best Peptides for Immunomodulation

Immunomodulation is one of the most active areas in peptide research, and a meaningful number of compounds are being used or actively discussed for their ability to tune immune function, whether that means calming chronic inflammation, rebuilding a depleted immune system, or supporting the body's adaptive response to infection. This guide covers seven peptides that appear most prominently in research and real-world use for this goal: Thymosin Alpha-1, BPC-157, TB-500, LL-37, GHK-Cu, Selank, and KPV. They are ordered by how prominently each shows up in research and real-world use, not ranked as a recommendation of one over another, and the evidence ranges from decades of randomized controlled trials to early animal data and community-reported experience with no clinical trial backing yet.

Immunomodulation 12 min read

7 Best Peptides for Immune System Support

Seven peptides consistently come up when people research immune system support, and the field spans a wide range of evidence. Thymosin Alpha-1 stands apart as the only compound with multiple randomized controlled trials behind it and regulatory approval in more than 35 countries, while compounds like BPC-157, GHK-Cu, and Thymalin are widely used in the community but rest on animal research, mechanistic data, or clinical experience from outside the United States rather than Western human trials. This guide covers each compound honestly, including those whose evidence is experiential rather than clinical. The entries are numbered by how prominently each appears in research and real-world use, not as a ranking of one being better than another for any individual situation.

Immune System Support 11 min read

7 Best Peptides for Alzheimer's

When people search for the best peptides for Alzheimer's, they most often encounter Cerebrolysin, Semax, and Selank as the starting point. From there, the conversation extends to investigational compounds: Dihexa, a synaptogenesis-promoting peptide studied in animals; PHDP5, a tau-targeting peptide that released a key transport protein in mouse studies; the CDK5-blocking peptide, a 12-amino-acid synthetic molecule designed to interrupt a hyperactive enzyme that drives neuron damage; and Semaglutide, a GLP-1 hormone approved for diabetes that some researchers associate with reduced Alzheimer's risk. People reach for these compounds because they address real biological targets in the disease, from neurotrophic support to synaptic repair to neuroinflammation. This guide walks through all seven: what each one is, how people use it for cognitive decline, and what the evidence honestly shows. The compounds are ordered by how prominently each appears in research and real-world use, not ranked as a personal recommendation, and the personalized decision belongs in the MyPeptidePal app.

Alzheimers 11 min read

Beyond Weight Loss: How Tirzepatide and Retatrutide May Help Break Addiction to Alcohol, Drugs, and More

Tirzepatide and retatrutide - dual and triple GLP-1 receptor agonists developed for weight loss - appear to reduce cravings for alcohol, nicotine, cannabis, and other substances by modulating the brain's dopamine reward pathways, not just appetite. The effect is described by users as a quiet, non-volitional disappearance of the desire to drink or use - not a battle of willpower, but a biological dimming of the craving signal itself. Early clinical and preclinical research supports this mechanism, though robust addiction-specific trials for these specific compounds are still underway, and no GLP-1 peptide is currently approved for addiction treatment.

Addiction 18 min read

GLP-1 vs GLP-2 vs GLP-3 Explained: The Naming Confusion, the Real Science, and What You're Actually Buying

In the research peptide community, "GLP-1," "GLP-2," and "GLP-3" are informal shorthand nicknames used by some suppliers to relabel semaglutide, tirzepatide, and retatrutide - not actual distinct receptor classifications. The real science is that all three compounds work through the GLP-1 receptor system, with tirzepatide adding GIP receptor activity and retatrutide adding both GIP and glucagon receptor activity, making them a dual agonist and triple agonist respectively. If you have seen product names like GLP1-SEMA, GLP2-TIRZ, or GLP3-RT on a supplier site, this guide decodes what those labels actually mean and explains what the underlying science actually says.

Glp 16 min read

Switching from Tirzepatide to Retatrutide: What to Expect and Why It Might Be Worth It

Retatrutide adds glucagon receptor agonism to the dual GIP/GLP-1 mechanism of tirzepatide, which increases resting energy expenditure and accelerates fat oxidation beyond what appetite suppression alone achieves. Phase 2 trial data shows retatrutide producing substantially higher weight loss than tirzepatide's established clinical benchmarks, making it a logical consideration for people who have plateaued on tirzepatide or want a higher ceiling on metabolic outcomes. Retatrutide remains investigational as of the time of writing - it is not yet FDA-approved - so access comes through research peptide channels rather than pharmacy dispensing, and no formal switching protocol from tirzepatide has been clinically established.

Glp 13 min read

Switching from Semaglutide to Retatrutide: What to Expect and Whether It's Worth It

Retatrutide is a triple agonist targeting GLP-1, GIP, and glucagon receptors simultaneously, producing greater weight loss in Phase 2 trials than semaglutide's single GLP-1 mechanism, primarily because the glucagon component directly increases energy expenditure rather than relying on appetite suppression alone. People switching from semaglutide typically report stronger satiety, faster fat loss once retatrutide is fully titrated, and a handful of new side effects that semaglutide does not produce - including a resting heart rate increase and skin sensitivity. The main considerations before switching are that retatrutide is not yet FDA-approved, carries a higher GI burden than semaglutide at therapeutic doses, and has limited long-term human safety data - all factors worth discussing with a qualified prescriber before making any change.

Glp 12 min read

Switching from Semaglutide to Tirzepatide: What to Know Before You Make the Change

Tirzepatide activates two hormone receptors instead of one, which is why its clinical trials show meaningfully greater weight loss than semaglutide - 16.5 to 22.4 percent of body weight versus roughly 15 percent for semaglutide at approved doses. For people who have plateaued on semaglutide, want stronger metabolic effects, or simply want to understand whether switching makes sense, tirzepatide represents a genuinely different pharmacological approach rather than just a newer version of the same thing. The transition itself is straightforward - there is no washout period, and you start tirzepatide at the lowest dose the week after your last semaglutide injection - but there are important things to understand about the adjustment period before you make the move.

Glp 15 min read

Switching from Compounded GLP-1s to Research Peptides: Save Hundreds a Month Without Changing Your Dose

Compounded GLP-1 medications like semaglutide and tirzepatide and their research-grade peptide equivalents are chemically the same compound - the only difference is the form factor and the source. Compounded versions arrive pre-mixed in liquid form from a pharmacy; research peptides arrive as lyophilized (freeze-dried) powder that you mix yourself with bacteriostatic water. The dose, the titration schedule, and the weekly injection routine stay exactly the same after the switch. Most people making this transition reduce their monthly cost by $300 to $800 or more, with no change to their protocol or their results.

Glp 15 min read

GLP Peptide Comparison: Semaglutide, Tirzepatide, Retatrutide, and Beyond

The major GLP-based peptides - semaglutide, tirzepatide, retatrutide, orforglipron, survodutide, and mazdutide - each activate different combinations of three receptors: GLP-1, GIP, and the glucagon receptor. That receptor profile is what determines how each compound performs on appetite suppression, weight loss, metabolic markers, and side-effect tolerability. Tirzepatide leads on food-noise elimination and appetite suppression at standard doses; retatrutide leads on raw weight-loss magnitude at higher doses; semaglutide is the most established with the deepest long-term safety data. Orforglipron is the only oral small-molecule option in this class currently approaching regulatory approval. Understanding these distinctions is what makes the difference between picking a compound that fits your goals and picking one that does not.

Glp 19 min read