Can Iontophoresis Deliver Peptides? What the Research Shows and What It Doesn't
Iontophoresis is the reason some patches are more than stickers. Here's how it works, what it can move, and the questions research hasn't answered for any specific product.
Key takeaways
- Iontophoresis uses a low electrical current between two electrodes to help move charged molecules into the skin.
- It has been used clinically for decades, and the FDA has approved iontophoretic systems for drugs such as lidocaine and fentanyl.
- Research shows it can increase skin transport of some peptides and larger molecules compared with passive contact.
- How much moves depends on the molecule's charge and size, the formulation, pH, competing ions and the current.
- Evidence that the method works isn't evidence that a specific product delivers a specific amount. LavION hasn't published human blood-level data.
"Does iontophoresis work for peptides?" is one of the most common questions we get, and it deserves a straight answer. The method is real, well studied and used in medicine. What it can't do is turn a milligram number on a label into a guaranteed dose.
How iontophoresis works
An iontophoretic system has a power source and two electrodes. When it's switched on, a low current runs through the skin between them. That current moves molecules in two ways [1]:
- Electromigration. Charged molecules move in the electric field. A positively charged molecule is pushed away from the positive electrode, and a negatively charged one away from the negative electrode.
- Electroosmosis. The current also creates a gentle flow of water through the skin. Because skin carries a slight negative charge, that flow favors positively charged and neutral molecules, and it can carry some larger molecules along.
The total amount of charge passed (the current multiplied by the time) is one of the main drivers of how much moves [1].
Why charge matters more than size here
For passive skin delivery, size is the main limit. Molecules under about 500 daltons cross intact skin far more easily than larger ones [5]. Iontophoresis changes that picture. Once a current is involved, a molecule's charge, its charge relative to its size, the formulation's pH and competing ions in the formula all matter, and the 500-dalton rule no longer predicts what can move on its own [1].
| Ingredient | Approx. molecular weight | Approx. net charge at pH 7.4 |
|---|---|---|
| Glutathione (reduced) | 307 Da | Negative (−1) |
| KPV | 342 Da | Positive (+1) |
| GHK-Cu (copper complex) | 403 Da | Positive (+1) |
| NAD+ | 663 Da | Negative (−1) |
| BPC-157 | 1,419 Da | Negative (−2) |
| MOTS-c | 2,175 Da | Positive (+3) |
| TB-500 (full-length thymosin β4) | 4,963 Da | Negative (about −3) |
Most peptides in wellness products are above 500 daltons and carry a charge, which is exactly why an active method is needed at all.
What the research on peptides shows
Laboratory and clinical studies show iontophoresis can increase skin transport of peptides and some larger biological molecules compared with passive contact [3][4]. Reviews of the field describe both real successes and real limits: transport generally falls as molecules get larger, and results vary a lot with formulation and current [3][6].
In medicine, iontophoretic systems have been approved for small drugs such as lidocaine (for local numbing) and fentanyl (for pain control) [1][2]. Those approvals show the platform is real. They don't tell you how a different molecule, in a different formulation and device, will behave.
Platform evidence vs product evidence
There are two different questions, and they need different evidence:
| Question | What answers it |
|---|---|
| Can iontophoresis move peptides into skin? | Platform research: lab and clinical studies of the method [1][3][4] |
| How much of this peptide, from this patch, reaches the bloodstream? | Product-specific human pharmacokinetic studies (blood levels over time) |
| Does that produce a measurable effect? | Controlled human studies of that product |
Most of what's published answers the first question. The second and third have to be measured product by product.
Is iontophoresis safe?
The most common effects are local: mild tingling, redness or irritation under the electrodes, which usually fade after removal. Higher currents can cause skin irritation or, rarely, burns, which is why current is kept low and devices are designed with limits [1]. Don't apply a patch over broken or irritated skin, and talk to a clinician first if you have an implanted electronic device, are pregnant, or are managing a medical condition.
Where LavION fits
LavION uses the ActivaPatch IontoGo 12.0 iontophoresis device, which applies a low electrical current to help move charged molecules across the skin during a wear period of up to 12 hours. LavION is needle-free and does not use microneedles. Ingredient amounts describe what is loaded into the formula, not measured delivery into the body.
Each LavION patch runs at a very low current, averaging about 0.1 mA, for up to 12 hours, which adds up to a defined electrical dose of about 80 mA·min per full wear window. Most people feel little or nothing.
What we haven't established: how much of each LavION ingredient reaches the bloodstream. LavION hasn't published human pharmacokinetic data, and we don't claim equivalence to injections. Standard LavION use is one patch every 5 days, worn for up to 12 hours. A Good Faith Exam with a licensed provider is required before your first purchase.
References
- 1.Kalia YN, Naik A, Garrison J, Guy RH. Iontophoretic drug delivery. Advanced Drug Delivery Reviews. 2004;56(5):619-658. pubmed.ncbi.nlm.nih.gov
- 2.Prausnitz MR, Langer R. Transdermal drug delivery. Nature Biotechnology. 2008;26(11):1261-1268. pubmed.ncbi.nlm.nih.gov
- 3.Hasan M, Khatun A, Kogure K. Iontophoresis of biological macromolecular drugs. Pharmaceutics. 2022. pmc.ncbi.nlm.nih.gov
- 4.Ita K. Transdermal iontophoretic drug delivery: advances and challenges. Journal of Drug Targeting. 2016. pubmed.ncbi.nlm.nih.gov
- 5.Bos JD, Meinardi MM. The 500 Dalton rule for the skin penetration of chemical compounds and drugs. Experimental Dermatology. 2000;9(3):165-169. pubmed.ncbi.nlm.nih.gov
- 6.Prausnitz MR. Microneedles for transdermal drug delivery. Advanced Drug Delivery Reviews. 2004;56(5):581-587. pubmed.ncbi.nlm.nih.gov
Frequently asked questions
Does iontophoresis work for peptides?
It can increase skin transport of some peptides compared with passive contact. How much moves depends on the molecule, formulation, pH and current, so results have to be measured for each product.
Is iontophoresis the same as a TENS unit?
No. A TENS unit stimulates nerves. Iontophoresis uses a low, steady current to move charged molecules into the skin.
Is iontophoresis FDA approved?
Iontophoretic systems have been approved for specific drugs, such as lidocaine and fentanyl. Regulatory status always depends on the specific product and its intended use.
Can iontophoresis deliver large molecules?
Research includes peptides and some proteins, but transport generally drops as molecules get larger, and efficiency varies a lot.
If I don't feel anything, is it working?
Feeling nothing is normal at LavION's low current. Sensation doesn't measure delivery. What matters for the device is that the patch stays on and runs for its wear window.
Does LavION use microneedles too?
No. LavION is 100% needle-free and uses iontophoresis only.
Keep reading
This article offers general wellness education and does not replace medical advice. Statements about LavION products have not been evaluated by the FDA, and these products are not intended to diagnose, treat, cure, or prevent disease. Peptide orders include a clinician review before fulfillment. If you are pregnant, nursing, managing a condition, or taking medication, speak with your clinician. See our medical disclaimer.