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New Study Finds That The Fungus Behind Athlete’s Foot Is Becoming Resistant To Common Anti-fungal Treatments — Except One

Story by Dr. Alex Nether

Board-Certified Dermatologist

Updated: July 21, 2026

I need to be honest about something.

 

I’ve been a dermatologist in South Florida for over 15 years, and I’ve treated more cases of athlete’s foot than I could possibly remember.

 

Some were runners.

 

Some spent all day inside work boots.

 

Some trained at gyms and used communal showers every morning.

 

And they all kept telling me the exact same thing: “It gets better… then it comes back.”

 

And I always had an explanation.

 

Maybe they stopped treatment too early.

 

Maybe their shoes stayed damp.

 

Maybe they picked it up again at the gym again.

 

So I gave them the same basic advice dermatologists have been giving for years:

 

Use an antifungal. Keep your feet dry. Change your socks. Dry your shoes.

 

And for plenty of people, that works.

 

But I never really questioned why some men could follow that routine exactly and still end up scratching the same spot between the same two toes a few weeks later.

 

Then one patient came back into my office for the third time.

 

And after I saw how much he had already done to get rid of it, I started asking a question I had never seriously considered before:

 

What if the patient was doing everything right, and the treatment was failing them?

 

That question eventually led me to a 2025 study on anti-fungal resistance that finally helped me find a solution.

The Patient That
Changed Everything

It all started with a U.S. Army Infantry soldier named Marcus Reed.

 

Marcus is 34, and the first time he came into my office, his athlete’s foot was already making his days miserable.

 

It almost always started in the same spot, between his pinky toe and the toe next to it.

 

First came the itch.

 

Then the skin turned white and soft.

 

Then the cracks started.

 

The cracks stung when he walked, but the itch was what drove him crazy.

 

After hours sweating inside heavy boots, there were days Marcus said he could barely focus on anything except getting them off so he could scratch.

 

So I treated Marcus the same way I had treated hundreds of patients before him.

 

We started with an antifungal cream like Lamisil.

 

It calmed the itching and his feet started looking better.

 

Then after a couple of weeks it came back.

 

So we tried another antifungal, Lotrimin.

 

Same result.

 

Because his feet stayed sweaty inside his boots, I had him use a foot powder like Gold Bond.

 

It kept them cooler and drier at first, but after hours of sweating, the powder turned into a cakey mess between his toes.

 

Then came extra socks, changing them halfway through the day.

 

Merino wool socks instead of cotton.

 

A boot dryer every night.

 

By his third visit, three months had passed.

He had followed the entire routine.

And he had gone through the same cycle over and over: treat it, watch it clear up, then wait for that little itch to come back again.

 

That was when I realized this wasn’t just Marcus.

 

I had seen the same thing happen with plenty of other guys.

 

So I stopped asking why the treatments weren’t working.

And started asking why they worked for a while, then the fungus came right back.

Why The Standard Solutions Fail

I started going through dermatology journals, case reports, and research on stubborn fungal infections.

 

After spending days reading pretty much the same stuff I had already learned in medical school, I finally found something different.

 

It was a study published on January 11, 2025, called “Terbinafine Resistance Among Trichophyton Isolates in the United States.”

 

Researchers tested hundreds of samples of Trichophyton, the same family of fungus that causes athlete’s foot, to see how well they still responded to antifungal drugs.

 

And what they found surprised me.

 

9 out of 10 samples were resistant to clotrimazole and terbinafine, the main ingredients in antifungal drugs I’d been recommending for years.

 

That was when something finally clicked.

 

Clotrimazole (Lotrimin) has been used since the late 1960s.

 

Terbinafine (Lamisil) has been used since the early 1990s.

 

Marcus wasn’t doing anything wrong.

 

The fungus had adapted, and the way we were treating it hadn’t.

 

That explained why it kept coming back.

 

The creams weren't strong enough anymore to kill all the fungus.

 

And when Marcus stopped treatment, the fungus that survived would start spreading again.

 

So giving Marcus another tube built around the same old anti-fungal ingredients didn’t make much sense.

 

So I started reading even more medical studies, specifically looking for recent research on which antifungal ingredients were able to attack the fungus in a different way.

 

And what I found next wasn’t a stronger version of the same treatment.

 

It was two anti-fungal agents that worked together to attack the fungus in a completely different way.

What The
Old Anti-fungals
Were Missing

It was an early 2026 study called:

“Comparative Efficacy of Single-Agent and Combination Antifungal Therapies Against Resistant Trichophyton Isolates.”

 

Researchers tested dozens of different antifungal ingredients and combinations against harder-to-treat strains of Trichophyton to see which approach worked best.

 

But one thing stood out.

 

The best result didn’t come from one antifungal ingredient.

 

It came from two antifungal agents working together, with each one doing a different job.

 

The first was undecylenic acid.

 

Undecylenic acid works by weakening the fatty outer layer the fungus needs to stay strong and keep growing.

 

The second was micro-encapsulated tea tree oil.

 

Micro-encapsulated simply means the tea tree oil is sealed inside tiny capsules that slowly release after it goes onto the skin.

 

So while the undecylenic acid weakens the outer protection, the tea tree oil keeps releasing and attacking the fungus underneath.

 

So instead of attacking the fungus in one way and giving it a chance to survive, this breaks their protection and eliminates all of the fungus, making it much harder for it to start growing again.

 

The problem was, I couldn’t find everything I wanted in one formula.

 

And I didn’t want to hand Marcus another complicated routine with three or four different products he had to remember to use every day.

 

So I saw an opportunity.

 

I spent the next 3 months working through different formulations, trying to combine the two antifungal agents with the same types of skin-protecting and moisture-control ingredients Marcus was already using separately.

 

Eventually, I got everything into one formula.

The Cream That
Put It Together

It started with undecylenic acid and microencapsulated tea tree oil to kill the fungus.

 

The next thing I wanted was the dryness Marcus was getting from Gold Bond, without the loose powder getting everywhere.

 

So I added silica and tapioca starch, which absorb moisture and dry down on the skin instead of sitting inside his socks as loose powder.

 

Then there was the itch.

Marcus was so desperate for relief that he was soaking his feet in vinegar, fighting through the sting every time it hit the cracks between his toes.

 

So I added zinc oxide and witch hazel to help soothe the itch and the raw skin without the pain and mess of a foot soak.

 

I also wanted there to be zero risk in trying it, so I added a 90 day money back guarantee.

So instead of having to spend money on a bunch of different treatments that might not work, I was able to put the jobs of all three into one formula.

 

After months of hard work, I created the Luma Labs Triple Defense Skin Fold Cream.

 

And the first person I gave the finished formula to was Marcus.

 

Over the next 30 days, Marcus started noticing something neither of us expected.

I’ll have Marcus tell you himself.

What Happened After 30 Days?

“I’m not gonna lie, I was pretty skeptical when he gave it to me.”

 

“I’d already tried so much stuff that I wasn’t expecting this to be the thing that finally worked.”

 

“The first week, I really didn’t notice much.”

 

“It felt cool when I put it on, which was nice, but Gold Bond did that too. My feet were still peeling. They still itched. I was basically thinking, alright, here we go again.”

 

“Around the second week, I started noticing I wasn’t scratching as much.”

 

“The fungus was definitely still there, but it wasn’t driving me crazy like before. Usually I’d be halfway through the day trying to figure out when I could get my boots off for a minute just to scratch. I wasn’t doing that nearly as much.”

 

“By the third week, the cracks between my toes weren’t stinging every time I walked anymore.”

 

“I also stopped carrying extra socks everywhere. Before, if my feet got soaked, I’d change them halfway through the day because I couldn’t stand sitting in wet socks for hours.”

 

“Then around week four, we had one of those long training days where I was outside basically all day.”

 

“Running, walking for hours with a heavy pack, sweating like crazy, same boots I always wear.”

 

“When I finally took my boots off that night, it hit me that I hadn’t thought about my feet once all day.”

 

“That was weird for me, because normally they were always in the back of my mind. The itching, the wet feeling, wondering if I needed to change my socks, wondering if my boots were making it worse.”

 

“By the end of that first month, it was gone.”

 

“And I wasn’t thinking about buying another pair of boots, dumping powder in them, or keeping socks on around the house because I was worried about spreading it.”

 

“But I still didn’t totally trust it.”

 

“Every other time I thought I had it beat, I’d get that little itch between my toes again and know it was starting over.”

 

“So I waited.”

 

“It’s been three months now.”

 

“Same boots. Same sweating. Same long days.”

 

“I kept waiting for it to come back.”

 

“It hasn’t.”

 

“At this point, the best part is I just put my boots on in the morning and don’t think about my feet again until I take them off.”

What My Patients
Have To Say

Since then, I’ve recommended it to a lot of my patients dealing with stubborn athlete’s foot.

 

I’m not going to tell you it’s worked for every single person.

 

Everyone’s skin is different.

 

But I’m seeing more guys come back telling me they’re finally getting through work without scratching, reapplying powder, or waiting for the fungus to come back again.

Before
After

Dantis Ramirez, 37

“i’m in steel toe boots basically my whole shift and my feet sweat like crazy. The creams always felt nasty once i put my socks back on and the powder would turn into this gross paste by the end of the day. This is the first thing where i can put it on in the morning and pretty much leave my feet alone.”

Before
After

Jason Lowe, 45

“Mine was always between the last two toes and running would make it split back open. I honestly thought this would be another cream i use for a week and forget about. Took a little bit but the itching stopped first, then the cracked skin finally started clearing up. Been running like normal.”

Before
After

Alexander Perez, 28

“I’ve dealt with this on and off for probably 10 years. Lotrimin, Lamisil, powders, vinegar, new socks, all of it. Everything would look better and then that little itch would come back again. That was really the only thing i cared about this time. It’s been a couple months and so far it hasn’t come back.”

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Why I Wouldn't Just Ignore It

After dealing with athlete’s foot long enough, it’s easy to start thinking, “Maybe this is just something I’m going to have to live with.”

I wouldn’t accept that.

 

Athlete’s foot can spread beyond the skin between your toes. If it reaches the toenails, the fungus can get trapped under the hard nail where regular creams have a much harder time reaching it, and getting rid of it can take months.

 

It can also spread to the groin and turn into jock itch.

 

It can pass through shared towels, floors, socks, and shoes.

 

I’ve even had a patient tell me his wife kept getting yeast infections while he was dealing with his foot fungus.

 

I can’t say the two were connected, but hearing that was enough for me.

 

Whether you try this or something completely different, I wouldn’t just accept it and learn to live around it.

What If This Doesn't
Work Either?

When we eventually made the finished formula available to the public, I knew the hardest people to convince would be guys like Marcus.

 

And I understood why.

 

They had already spent years trying things.

So I wanted them to have enough time to judge the formula in their real life.

 

Not for two days.

 

Through work.

 

Training.

 

Hot days.

 

Normal life.

 

So every order comes with a 90-day money-back guarantee.

 

Try it. See what happens.

 

And if it isn’t right for you, use the guarantee.

 

You don’t have to believe another promise.

 

You get to judge it on your own feet.

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You Have Two Choices

Choice one: keep living around it.

 

Keep scratching through your socks.

 

Keep changing them halfway through the day.

 

Keep dumping powder into your boots. Keep buying another cream every time it flares back up.

 

And every time that little itch starts again, keep wondering if this is the time it spreads to your nails or turns into something even harder to get rid of.

 

Choice two: stop repeating the same routine and try a modern formula built to attack the fungus, control the moisture, and calm the itch all at once.

 

Because you shouldn’t have to spend another year managing your feet like this.

Take a look at the formula we built.
 

I put the website link down below👇

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Triple Defense Cream

✅ Targets stubborn foot fungus

✅ Keeps sweaty feet drier

✅ Soothes itching and cracks

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