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TB-500 vs IGF-1 LR3
TB-500 sits in healing, while IGF-1 LR3 sits in growth hormone — so despite being mentioned together they are used for different things. 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.
TB-500Healing
IGF-1 LR3Growth HormoneAt a glance
| TB-500 | IGF-1 LR3 | |
|---|---|---|
| Category | Healing | Growth Hormone |
| Typical route | SubQ | SubQ |
| Shelf life once mixed | ~30 days | ~30 days |
The differences that actually matter
They aren't really substitutes: TB-500 sits in Healing while IGF-1 LR3 sits in Growth Hormone. People usually pick between them because of a shared secondary effect rather than because they do the same job.
What TB-500 is
TB-500 is a synthetic variant of the naturally occurring peptide Thymosin Beta-4 (TB4), a vital component found in virtually all human and animal cells. Its primary mechanism of action centers on its ability to regulate actin, a crucial protein involved in cellular structure, movement, and repair. It is important to emphasize that TB-500 is strictly intended for research use only and is not approved for human medical or therapeutic applications.
What IGF-1 LR3 is
It primarily exerts its effects by binding to the IGF-1 receptor, a transmembrane tyrosine kinase receptor, which then initiates intracellular signaling cascades, notably the PI3K/Akt and MAPK pathways, critical for cell growth, proliferation, and differentiation. This decreased binding to IGFBPs allows a greater proportion of IGF-1 LR3 to remain unbound and biologically active for a longer duration, contributing to its prolonged systemic presence and sustained anabolic signaling. It is crucial to remember that IGF
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 — TB-500 and IGF-1 LR3 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 TB-500 and IGF-1 LR3?
They aren't really substitutes: TB-500 sits in Healing while IGF-1 LR3 sits in Growth Hormone. People usually pick between them because of a shared secondary effect rather than because they do the same job.
Can you log TB-500 and IGF-1 LR3 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, TB-500 or IGF-1 LR3?
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.
Handling questions
Whichever you pick, mixing and storage work the same way. Search the guides and land straight on the answer.
Can I shake it? · It went cloudy · Should I filter? · Fridge or freezer?
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Educational reference only. This page contains no dosing guidance and is not medical advice.