Happy Tuesday!
I just released a new masterclass on MOTS-c.
This one is for the nerds. If you have ever wanted to actually understand what MOTS-c is doing under the hood instead of just calling it an "energy peptide," this is the episode.
Watch on YouTube: https://youtu.be/-2KHM0m2hqU
Listen on Spotify: https://open.spotify.com/episode/1gm3FXwjaB26mzqmf4ClV8?si=_nsLoyW0Si62LGcKrNGXew
Here is what I covered.
Backstory
MOTS-c is an exercise mimetic. That means it tells your body to act like it just trained, even when it didn't.
This is an endogenous peptide, meaning your body already makes it.
When you train hard, your mitochondria release MOTS-c as a chemical message. That message tells the body to burn fat, pull glucose out of the blood, and build more mitochondria.
The mitochondria are the little power plants inside your cells that turn food and oxygen into usable energy.
Almost every peptide in your body is built from instructions in the cell nucleus. MOTS-c is one of the only ones written into the mitochondrial genome itself.
It was discovered back in 2015 at USC. It was the second mitochondrial peptide ever characterized in detail, right after humanin.
As you age, your natural MOTS-c levels fall. Taking it exogenously is an attempt to restore a signal your body used to make in abundance.
The AMPK Switch
AMPK is the master fuel gauge of the cell. When energy runs low, AMPK flips on.
It pulls glucose from the blood, burns fat, and pauses non-essential building. It is the same switch that exercise flips.
MOTS-c does not grab AMPK directly. It works one step upstream.
It blocks a step in the folate cycle, causing a compound called AICAR to build up, which activates AMPK naturally.
Under metabolic stress, MOTS-c travels into the nucleus and binds directly to your DNA.
It switches on protective antioxidant genes. Most mitochondria-to-nucleus messaging happens indirectly. MOTS-c does it directly.
Downstream you get new mitochondria built, less myostatin signaling, and white fat browning into the kind that burns calories.
Candidates
MOTS-c works best on people who are already doing the work and still feel stuck.
The metabolically stuck person over 40 is the classic candidate. You train, you eat well, and you still can't get the results you got at 25.
The insulin-resistant or pre-diabetic person responds well too. Improving glucose uptake is MOTS-c's single most evidence-supported benefit.
The aging athlete is another. The data on exercise capacity is strongest in older animals, and I hear the same thing anecdotally in older people.
However, some people should be careful.
If you are sensitive to peptides, prone to hives, or have a history of allergic-type reactions, I would steer you away.
There is a contingent of people, maybe 10%, who react badly to MOTS-c, and some of those reactions are nasty.
If you are pregnant, trying to conceive, or breastfeeding, skip it.
We have no reproductive safety data. If you have active cancer or a cardiac history, proceed with real caution. And if you are on glucose-lowering drugs, watch your blood sugar closely.
Dosing
I have moved to lower doses over the years, and I walk everyone in slowly.
Tier one is a screening dose. 250 to 500 micrograms per day for two weeks. You probably won't feel much. That is fine. The point is to make sure your body tolerates it before you scale up. I would much rather you have a manageable reaction to 250 micrograms than a scary one to 10 milligrams.
Tier two is the workhorse. 1 to 2 milligrams per day, five days on, two days off, for eight weeks. This is where I live. I take 1 milligram and feel great. My bloodwork looks clean. For most people, this range does everything the higher doses do.
Tier three is for chronic dysfunction. Severe inflammation, heavy insulin resistance, chronic fatigue. 2 to 5 milligrams per day for 8 to 12 weeks under closer monitoring. I cap it at 5 milligrams. I have not seen anyone get more out of 10. And PLEASE work your way up to this dose.
Inject once a day, in the morning. It can be energizing, so you don't want it at bedtime.
Stacking
The pairing everyone asks about is MOTS-c and SS-31.
For badly damaged mitochondria, I lead with SS-31 alone for the first few weeks, then add MOTS-c on top, then continue MOTS-c through its block.
Leading with MOTS-c on a crumbling base means ramping up production on a bad foundation. If you are already healthy, just alternate. Eight weeks of one, eight weeks of the other. Lately I rotate humanin in there too.
MOTS-c also pairs well with GLPs, growth hormone secretagogues, and TRT.
Final Thoughts
MOTS-c is often labeled as just an "energy and fat loss" peptide, which I think sells it short.
It really is metabolic signaling at the cellular level.
It flips the same switch your training flips, and it rewrites antioxidant gene activity at the same time.
That combination is why I keep coming back to it, and why I think a couple of cycles a year make sense, even for healthy people optimizing everything.
The caveat is that some people get heart rate spikes. Some get real allergic reactions, almost always at the higher doses.
So treat it with respect. Start low. Go slow. Cycle it. It is an amplifier on top of training, nutrition, hormones, and sleep. It will not replace any of those.
Don't fear MOTS-c. Just understand it is powerful, and powerful tools demand respect.
As always, thank you for your support!
Best,
Hunter Williams
Further Reading