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VIP vs LL-37
VIP and LL-37 are both immune peptides, which is why they get recommended interchangeably — but they are different compounds with different origins. The table below sets out the differences. We give no dosing guidance.
Side by side, in plain English — what each one is, where they overlap and where they genuinely differ.
VIPImmune
LL-37ImmuneAt a glance
| VIP | LL-37 | |
|---|---|---|
| Category | Immune | Immune |
| Typical route | Nasal or SubQ | SubQ |
| Shelf life once mixed | ~30 days | ~30 days |
| Commonly reported effects | Immune balance Reduced inflammation Mold/CIRS support | Broad antimicrobial Wound healing Immune boost |
| Reported considerations | Nasal irritation Fatigue on start | Injection site irritation |
The differences that actually matter
Both are classed as Immune peptides, so they get compared constantly and are often researched for overlapping reasons.
Route of administration differs — VIP is typically nasal or subq, LL-37 is typically subq. That alone changes how convenient each one is to keep up with.
Where they overlap: immune balance.
Reported mainly for VIP: reduced inflammation, mold/cirs support.
Reported mainly for LL-37: broad antimicrobial, wound healing.
What VIP is
Vasoactive Intestinal Peptide (VIP) functions as a neuropeptide and exhibits broad biological activity throughout the body. Its primary mechanism of action involves binding to specific G protein-coupled receptors, particularly VPAC1 and VPAC2, which are extensively distributed on various cell types including immune cells, epithelial cells, and neurons. Upon binding, VIP activates adenylate cyclase, leading to an increase in intracellular cyclic AMP (cAMP) levels, which mediates its downstream effects. While VIP has
What LL-37 is
LL-37 is a human cathelicidin antimicrobial peptide, a component of the innate immune system. Its mechanism of action involves direct disruption of microbial membranes, providing broad-spectrum antibacterial and antiviral activity. Beyond this direct action, LL-37 acts as a signaling molecule, interacting with various cellular receptors, including G-protein coupled receptors like FPR2, to modulate immune responses. This interaction can influence processes such as chemotaxis, angiogenesis, and cytokine production. B
How to compare them for yourself
Anecdotes online are noisy because nobody is measuring the same thing. The only comparison that means anything is your own: log each entry with a timestamp, keep the vial ledger honest so you know what you actually got through, pick two or three metrics before you start, and look at the trend after several weeks rather than day to day.
Peptide Wizard does that part for you — VIP and LL-37 are both in the built-in reference library with a 3D vial, and your history, vial ledger and cost per entry stay private on your device.
FAQ
What is the difference between VIP and LL-37?
Both are classed as Immune peptides, so they get compared constantly and are often researched for overlapping reasons.
Can you log VIP and LL-37 in the same period?
Plenty of people record more than one peptide at a time. Peptide Wizard keeps a separate vial ledger and entry history for each, so you can see exactly what overlapped and when — it does not recommend combinations or doses.
Which is better, VIP or LL-37?
There isn't a universal answer — reported responses vary a lot between individuals, which is why your own log is more informative than anyone else's anecdote. Track one variable at a time and compare your own metrics over several weeks.
Is this medical advice?
No. This page is educational reference material only. It contains no dosing guidance. Speak to a qualified healthcare professional before making any decisions.
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Educational reference only. This page contains no dosing guidance and is not medical advice.