This is my first-week post on MOTS-c. My first injection was exactly a week ago today, Wednesday July 8th, and I'm writing this before my third one, which happens right after I finish this post. I wanted to get the honest early read down while it's fresh, baseline and all, instead of waiting a few months and telling you a tidy after-the-fact story.

So this is the one-week check-in, I'm writing it on day one of week two. Too early to know anything for sure, but there's already enough going on that I want it on the record.

The rut I'd been in

To be honest I've been lazy, or less motivated, for months. I'd trace it back to around November 2025, when I went off retatrutide cold turkey for a few months. I'm back on it since February 2026, and in that gap my weight slowly crept up from a low of 189 lbs to 198 (it would probably be a lot higher without the peptide, so I'm not beating myself up too much). If you want the honest version of what coming off a GLP-1 does, I wrote about that in what happens when you stop.

The bigger problem wasn't really the weight, it was that I had zero drive to exercise even though I know exactly how important it is. I was basically letting the peptide do all the work of keeping the weight off, and I wasn't earning anything. That's the part that bugged me. Retatrutide is great at holding the line, but it doesn't put you in the gym.

Why I tried MOTS-c specifically

I'd been reading a lot about MOTS-c and how it might help with exercise. Not through motivation exactly, I still have to actually do the work, nothing injects the effort for you, but with exercise itself, the capacity and the recovery side of it. I got curious enough that I bought some to test on myself.

If you've never heard of it, MOTS-c is one of those weird ones. It's a tiny 16-amino-acid peptide that your own body actually encodes, inside the mitochondrial 12S rRNA gene, and researchers have been looking at it for metabolism, insulin sensitivity, and the AMPK energy pathway. Here's the honest science caveat though, and I think it matters: most of that work is in mice and cells, human data is still limited as of mid-2026. The one solid human finding is almost backwards from what people hope, exercise raises your own MOTS-c (one study saw muscle levels jump around 12-fold after a workout), rather than proving that injecting it makes you fitter. The "runs longer and farther" performance stuff is from mouse studies. So I went in curious, not sold. If you want the full technical breakdown, the mechanism, the actual studies, and where it stands with the FDA, I wrote it all up in the what is MOTS-c research post.

What I'm running (and how I inject it)

My protocol right now is 2.5 mg twice a week, Wednesdays and Saturdays. I want to be really clear that this is just what I'm doing for me, it's not a dosing recommendation, MOTS-c is research-use-only and your protocol is between you and your provider. The mixing is the same process as any peptide, I walk through all of that, needles and units and swirl-don't-shake, in the how to reconstitute any peptide guide, and there's a video of me actually doing an injection embedded on that page (including this exact one). If you just want the math for a vial, the reconstitution calculator does it.

I'm also considering switching things up to a smaller daily amount, something like 1 to 1.25 mg five days a week, because I've read that less peptide per shot can calm the injection-site reaction. I haven't fully decided yet. If I do change it I'll note it here.

What the injection actually feels like

For me the injection site stings and gets a bit itchy for about one to three hours afterward, and it stays a little red for a while. That's been the main physical thing a week in, nothing dramatic, but it's noticeable enough that it's the reason I'm thinking about the smaller-daily-dose change above. Everyone's different, so file that under my experience, not a rule.

My first week, honestly

Okay, the part you actually came for. Here's what I've noticed, with the giant asterisk that it's been seven days and this could all be placebo or just my own motivation cycle turning back over.

The hike. I still haven't "made it to the gym," lol. But I did end up doing a 3-hour hilly hike yesterday and felt fine the whole way through. My body is sore today, I'm not going to pretend it isn't, and to be clear this isn't testosterone, haha, it's not some superhuman thing. But considering how little I'd been exercising, that hike went incredibly well. Better than it had any right to.

Focus and drive. This is the one that's surprised me most. I've had real focus and drive through the day even without the gym, I've been hyper-concentrated on my website and app building in a way that's genuinely different from the last while. Maybe placebo, I keep saying that, but it's there.

The urge to move. I've got the actual urge to work out, like I genuinely want to go to the gym or get on the bike. I just haven't, because I've been buried in work and other commitments. But the wanting is back, and that's been missing for a long time. It's like a nagging feeling, a calling, almost.

Warmth. I've also noticed a warmth around my belly. I'm honestly not sure how fast MOTS-c is supposed to act, or whether it builds up in your system over time the way GLP-1s do, so I don't know what to make of it yet, but it's a difference from before.

The honest read at one week

Something feels different, mostly in drive and the urge to move, and one surprisingly good hike. But it's seven days. It could be the peptide, it could be the normal cycle of motivated to not-motivated and back to motivated, or it could be that deciding to try something made me act like someone who tries things. Too early to call. That's exactly why I'm logging it now.

Where retatrutide fits right now

I'm still on retatrutide the whole time, 4 mg a week at maintenance. That dose has been good, I haven't been gaining, and I still have control over how much I eat. I'll be honest that it doesn't "stop" me completely, if I wanted to I could put down an extraordinary amount of food, I think, I haven't actually tested that theory, lol. But it holds the line, which is the whole job of a maintenance dose. You can see the fuller weight history on the before and after.

MOTS-c is the new variable I'm adding on top of that stable base. Keeping the reta steady is actually part of why this is a semi-clean test, the weight side is already dialed in, so what I'm watching for is the exercise and energy side.

A quick KLOW update

Small update for anyone following the KLOW post. I've got the KLOW blend in hand now, but I haven't started it. I decided to run MOTS-c first because I didn't want too many variables going at once, if I start three things at the same time I'll never know what did what. Once MOTS-c has a few weeks under it I'll decide when to add KLOW, and I'll keep you posted. If you want the technical breakdown of that blend in the meantime, it's in the KLOW writeup.

What I'm tracking (and why the baseline photo matters)

Same as everything else, I'm logging it in the app. Every MOTS-c injection goes in with the date and amount, my supply so I know when I'm running low, and then the subjective stuff, energy, drive, whether I actually moved. That last part is the whole point for me this time, because the thing I was missing wasn't tracking, it was earning it. The photo at the top is my genuine starting point, 198 lbs, no flexing, no good lighting on purpose. I'll retake that same shot at the end so there's an honest before and after instead of a vague memory.

Frequently asked questions

What is MOTS-c?

MOTS-c is a 16-amino-acid peptide your body encodes inside the mitochondrial 12S rRNA gene. Research, which is still mostly in mice and cells with limited human data as of mid-2026, looks at it for metabolism, insulin sensitivity, and the AMPK energy pathway. It is not FDA approved and is sold for research use only.

Does MOTS-c actually help with exercise?

The honest answer is that the strongest human finding is almost the reverse of what people hope: exercise raises your own MOTS-c, with one study seeing skeletal-muscle levels jump about 12-fold after a workout. The idea that injecting it boosts performance mostly comes from mouse studies, where treated mice ran longer and farther. So it is promising but early, and my own week-one read is anecdotal and could easily be placebo.

What does a MOTS-c injection feel like?

For me, the injection site stings and gets a little itchy for about one to three hours after, and it stays slightly red for a while. That has been my main physical side effect a week in. Everyone reacts differently, so this is just my experience.

Can you take MOTS-c with a GLP-1 like retatrutide?

I personally am, I inject MOTS-c while staying on retatrutide at a maintenance dose. That is my own choice for my own body, not a recommendation, and both are things to talk through with a healthcare provider. MOTS-c is research-use-only and not an approved medicine.

Is MOTS-c FDA approved?

No. As of mid-2026 MOTS-c is not FDA approved for any use and is sold as a research chemical, not a prescription medicine. Treat anything you read about it, including this post, as one person's experiment and not as medical advice.

How often do you inject MOTS-c?

I started at 2.5 mg twice a week, Wednesdays and Saturdays. I am considering switching to a smaller amount spread across five days a week to see if it calms the injection-site reaction, but I have not decided yet. This is what I am doing personally, not a dosing recommendation.

Where this goes next

That's week one in the books. So far so good, but it really is too early to tell whether this ends up being a win for me or a placebo I paid for. I've got a few months of supply to run the test properly, alongside the reta I'm already on. I'll update this post as the weeks go, honestly, whichever way it lands.

The thing I was actually missing was earning it

WeightSnap logs every peptide and GLP-1 injection, tracks your vials and supply, and has an Earn It habit wall for the part no peptide does for you, actually doing the work. It's how I'm tracking this whole MOTS-c experiment. Free to download.

Download WeightSnap

Check back, I'll update this post as the protocol goes.