Galvanic vs. Microcurrent vs. LED: What Each Device Actually Does to Your Skin

This article is for educational purposes and does not constitute medical advice. Individual results vary.

Walk into any beauty retailer or scroll through skincare social media and you will meet three device technologies repeatedly: galvanic, microcurrent and LED. They get grouped together as "at-home skincare devices", which is unhelpful, because they work in genuinely different ways and address different concerns.

Here is what each one is, what each manufacturer actually claims, and — the part most comparisons skip — which of them is worth your money first.

One note on how this page has changed. It previously carried current ranges in milliamperes and microamperes, LED wavelength bands, and mechanism claims about ATP synthesis, fibroblast stimulation and lymphatic drainage. None of those could be sourced to a manufacturer or a citation we could point at, so they have been removed. What is left is what can be stated honestly.

Technology 1: Galvanic current

What it is

Galvanic devices pass a continuous, low-level direct current. The principle they are built on is iontophoresis — like charges repel, opposite charges attract — which gives two modes: one intended to move charged ingredients into the skin, one intended to draw material out of pores.

Nu Skin and galvanic

Nu Skin was an early name in consumer galvanic devices with the ageLOC Galvanic Spa. Checked on 15 September 2026, that device and its galvanic gels are no longer listed on Nu Skin's US site, and NuBodyRx does not stock them. A search for "Galvanic" there returns only an ageLOC Galvanic Face Conductor accessory.

We do still carry the Enhancer Skin Conditioning Gel, which Nu Skin describes simply as "the perfect splash of refreshing hydration". We are not going to tell you it is a galvanic gel or a substitute for one — it is sold as a hydrating gel in its own right, and that is the only basis on which we will sell it. If you own a discontinued device and want to know what to use with it, ask Nu Skin directly. Our dated note on the galvanic gels has the full picture.

If you are choosing between the conductive gels currently sold, the conductive gel guide sets out which goes with what.

Technology 2: Microcurrent

What it is

Microcurrent devices deliver a pulsed low-level current rather than a continuous one. That is the real distinction from galvanic: continuous current moves molecules, pulsed current is used for stimulation.

The Nu Skin RenuSpa iO

Nu Skin's own description, quoted as written:

"Visibly contour, tone, and firm skin through skin stimulation with Nu Skin RenuSpa iO, our award-winning skin stimulation device. Using patent-pending Adaptive Microcurrent Technology that comfortably adjusts to your skin in real time, this device offers a smooth and comfortable massage helping your body feel refreshed and relaxed."

Also printed: "Visibly depuffs, contours, tones, and sculpts and reduces the appearance of dimples through skin stimulation" and "Skin stimulation helps visibly firm and tighten for a more youthful appearance."

The technology name matters, because it gets mangled constantly: it is patent-pending Adaptive Microcurrent Technology. Microcurrent, not nanocurrent.

The ageLOC RenuSpa iO is $419 and requires Nu Skin Conductive Gel at $74. Both figures are worth knowing before you buy, because the gel is an ongoing cost rather than a one-off.

What Nu Skin does not publish for it: any mechanism, any timeline, and any comparison with a salon treatment. See our protocol guide for how to actually use it.

Technology 3: LED light therapy

What it is

LED devices shine specific wavelengths of light at the skin. No current passes through it at all. Different colours are used for different purposes — red and near-infrared for general skin appearance, blue in acne devices, amber for redness.

Nu Skin does not currently make an LED device, and NuBodyRx does not stock one. We are including LED here because people compare it against the other two, not because we have something to sell you in this category — which means we have no reason to talk it up or down.

One practical thing worth knowing if you buy one elsewhere: consumer LED panels run at much lower output than professional equipment, and manufacturers vary enormously in what they disclose about it. We are not in a position to recommend a specific unit.

Side by side

Deliberately absent from that table: any row scoring the three against each other on results. Nobody publishes figures that would let us do that fairly.

Which Should You Prioritise?

If you own no device at all, none of these is the right first purchase. That is the most useful sentence on this page and it costs us the most money to write.

Cleansing is the step you do twice a day, every day, which means a cleansing device earns its keep far faster than anything used weekly. The ageLOC LumiSpa iO is the one Nu Skin attaches seven clinically proven skin benefits to. Full comparison of the Nu Skin devices →

After that:

• Body contouring and firmness — the microcurrent RenuSpa iO. Of the three technologies here, it is the only one currently in the Nu Skin range.
• Fine lines — a topical rather than a device. ageLOC Future Serum carries printed wrinkle claims, and costs a fraction of a device.
• Getting more from serums — this was galvanic's pitch, and the device is no longer sold. There is no like-for-like replacement and we will not pretend otherwise.

Combining Them

If you do own several, sequence matters, and the rule is simple: clean skin first, then whatever needs contact with it, then light, then moisturiser.

1. Cleanse — LumiSpa iO, two minutes
2. Microcurrent — conductive gel, then treat
3. LED, if you own one — light passes through remaining product
4. Moisturise

Realistic frequencies: the LumiSpa iO twice daily per Nu Skin's directions; the RenuSpa iO a few evenings a week; LED according to its own manufacturer's instructions. Doing all three every night is how devices end up in a drawer.

Frequently Asked Questions

What is the difference between galvanic and microcurrent?

Galvanic uses continuous direct current and is built around moving charged molecules into or out of the skin. Microcurrent uses pulsed current and is built around skin stimulation. Different technologies, and their conductive gels are not interchangeable.

Does the Nu Skin RenuSpa iO use galvanic or microcurrent?

Microcurrent — patent-pending Adaptive Microcurrent Technology, in Nu Skin's own words. It uses Nu Skin Conductive Gel, not the Enhancer gel.

Is LED or microcurrent better for anti-aging?

We are not going to rank them, because neither category publishes evidence that would let anyone do it honestly. What we can tell you is what Nu Skin claims for its microcurrent device — contouring, toning and firming through skin stimulation — and that we do not sell an LED device and so have nothing to gain either way.

Does NuBodyRx sell galvanic or LED devices?

No. We stock the microcurrent RenuSpa iO, the LumiSpa iO, the GloPRO microneedling tool and the Prysm iO. We carry the Enhancer gel as a hydrating gel in its own right.

Where can I buy the Nu Skin RenuSpa iO?

NuBodyRx.com, $419, shipped sealed from Nu Skin's own warehouse with full manufacturer warranty. No membership required, and 90 days to change your mind — used or not. That 90 days is ours; Nu Skin's published US refund window is 30 days from the purchase date.