I've been reviewing a lot of information about SLU in the recent weeks and the more I review the more confused I become about just how to use the molecule correctly. Can anybody shed some light on this? just exactly how does one incorporate into their protocol and how would one test to be sure it would be useful instead of causing negative effects?

How does everyone feel after coming off MotsC (3-5mg 3-5 times a week), NaD+ (25-100mg 3-5 times a week) at these doses? I see these doses being shared regularly so I’m basing my thoughts off of this. This is only for myself and I always react different with medication, etc. The highest I went to on MotsC was 1mg five days a week and I had trouble sleeping because I had so much energy so I backed it down to 500mcg 3-5 days and it was my sweet spot. Nad+ I stay between 10-20 mg 3-5 times a week. I just don’t need anything more and it’s too much for me personally. I may even be missing out on other benefits of these because I can’t reach the “recommended” doses. Last year I went through the process and doses I just shared and then did SS-31. I regretted coming off both MotsC and NaD+ because I did see and feel a noticeable decline in energy through the SS-31 only. After completed though and when I eventually went back to MotsC it was absolutely amplified and it made me a believer in the work that was being done through SS-31. The previous 500mcg that was right for me was now like the original 1mg dose so I decreased to 250mcg for a while and then gradually increased back to 500mcg. I think this was two-fold; one from the SS-31 doing its job and two from allowing my body to reset and going back fresh to the MotsC. My question is when you’re at these higher and recommended doses how do you feel when you come off? Do your energy levels tank and you feel a noticeable difference? Do you gradually decrease the last couple weeks to not feel the drastic change? Do you move to another mitochondrial peptide to maintain and never experienced pulling off something completely Experiences with SS-31? I’m asking for the sake of knowledge and understanding a bit more and I’m looking for personal experiences to pull from. Thanks group!

We keep calling them power stations. It is a fair label, and like a lot of fair labels it quietly does some damage, because it tells you what a mitochondrion produces and almost nothing about why it can produce it at all. A battery is a sealed thing. You charge it, you drain it, you replace it when it dies. Sit with that picture for a second, because it is the one most people carry, and then watch what happens to it the moment you look at the actual organelle under any kind of magnification. The first thing that breaks the battery picture is the folding. The inner wall of a mitochondrion is not a smooth bag. It is pleated, packed into dense accordion folds called cristae, the way you would fold a long letter to fit a small envelope, except here the folding is the entire point. Those folds are where the energy machinery lives. The more cleanly the membrane folds, the more machinery you can line up along it, and the more closely that machinery is held in register, the faster electrons can hand off down the line without leaking. So before a single molecule of fuel enters the conversation, the shape of the membrane has already decided how much useful energy you are going to get out of it. Form is doing the work we usually credit to fuel. Which raises the obvious question. What holds the folds? A membrane is mostly fat, a double sheet of it, and most of those fats are unremarkable structural lipids that do exactly what walls do. One of them is not. Cardiolipin is a strange, four-tailed fat found almost nowhere in the body except the inner mitochondrial membrane, and its job is to make that membrane bend. Picture trying to fold a stiff sheet of cardboard into tight pleats. It cracks, it springs back, it will not hold a crease. Now picture a sheet scored along every fold line, designed to bend. Cardiolipin is the scoring. It sits at the sharp turns of the cristae and lets the membrane curve hard without tearing, and it does a second thing that matters just as much. It acts like glue for the protein complexes that make energy, gathering them into tight working clusters instead of letting them drift apart across the surface.

A coach messaged me the night the paper started circulating. He had read the headlines and not the methods, and he wanted to know whether we had been wrong about all of it. Mitochondria make lactate now. The shuttle is finished. Burn the textbook. I told him to slow down, because the textbook he was about to throw out is the one that finally got lactate right, and the new work does not undo it. It complicates it, which is a different thing entirely, and the difference is where all the interesting biology lives. Start with where we actually stand. For most of the last century lactate was filed under waste, the acid byproduct of muscle running short on oxygen, the thing that made your legs scream on the last set and supposedly poisoned the tissue afterward. That story was wrong, and it took roughly fifty years of patient tracer work to dismantle it. Lactate is not exhaust. It is one of the most heavily trafficked fuels the body owns, produced continuously, handed between cells, carried between tissues, and burned for energy almost everywhere it lands. Your heart prefers it. Your brain leans on it through astrocyte-to-neuron handoff. During hard exercise the majority of the lactate you generate, somewhere in the neighborhood of seventy to eighty percent, is cleared by oxidation rather than excretion, a great deal of it in oxidative muscle and cardiac tissue that treat it as premium fuel rather than garbage to flush. This is the lactate shuttle, and it is about as close to established as human physiology gets. Picture it as a river. A wide, fast river running through the whole metabolic landscape, fed by glycolysis in working tissue, drained by oxidation in tissues hungry for carbon. The water never stops moving. It is the moving that matters, not the existence of any single tributary. Hold that image, because it is the one thing the headlines keep losing. Now the new paper. A Cell Metabolism study, elegant methods by every account, showing that mitochondria can deal with lactate directly and, under the right conditions, can even generate it from pyruvate inside the organelle. That second part is the headline grabber. The picture most of us carry is that lactate is made out in the cytosol, the watery space around the mitochondria, and that the mitochondria are strictly in the business of burning fuel, not brewing it. So the idea that the powerhouse itself might run the reaction backward and produce lactate feels like a reversal. It is genuinely interesting. It is also, I would argue, being read far past what it shows.

A lot of people are looking at mitochondrial compounds right now the same way previous generations looked at anabolic steroids. Bigger engine equals bigger muscle. More ATP equals more hypertrophy. On the surface that sounds logical and honestly I understand why people get excited. You can feel some of these compounds. People notice better recovery, better work capacity, less fatigue accumulation, sometimes even better cognition. Training sessions feel cleaner. Output becomes more repeatable. There’s often this sensation people describe where they feel “harder to drain,” and that’s interesting because it hints at something deeper than simple stimulation. But this is where the conversation usually gets flattened into social media nonsense. Muscle growth and energy production are related, but they are not interchangeable. A better way to think about mitochondria is not as batteries but as adaptive traffic control systems. They’re constantly sensing nutrient flow, oxygen tension, redox state, calcium flux, inflammatory signals, mechanical stress, and energetic demand. They decide where resources go, how efficiently electrons move, whether stress is survivable, and whether the environment supports adaptation or threatens survival. That changes the conversation completely because compounds like SS-31, MA-5, and MOTS-c stop looking like “muscle builders” and start looking more like tools that may improve the environment surrounding adaptation. That distinction matters a lot. Take SS-31 for example. Most people casually refer to it as an “energy peptide,” but I think that framing creates confusion because it implies it’s forcing energy production upward like slamming the gas pedal on a damaged engine. The more interesting mechanism is that SS-31 appears to stabilize cardiolipin within the inner mitochondrial membrane. Cardiolipin is one of those molecules most people never hear about but it’s unbelievably important. Think of it like the scaffolding that helps organize the electron transport chain and maintain structural integrity inside the mitochondria. When cardiolipin becomes damaged or disorganized, electrons leak more easily, reactive oxygen species rise in the wrong places, ATP production becomes less efficient, oxygen handling worsens, and the entire energetic conversation inside the cell becomes noisy and chaotic. SS-31 appears to reduce some of that chaos. Now think about what that means for training adaptation. If a muscle cell can maintain cleaner electron flow during stress, it may tolerate repeated contractions better. ATP regeneration may become more stable. Oxidative stress may become more controlled instead of excessively chaotic. Recovery signaling may improve because the energetic system is no longer spending as many resources dealing with unnecessary leak and instability. That does not automatically mean bigger muscles. It means the muscle may be operating in a cleaner energetic environment. Huge difference. This is one of the reasons some of the older adult physiology studies with SS-31 became so interesting. Researchers observed improvements in mitochondrial ATP production and ADP sensitivity relatively rapidly after administration. In plain English, the mitochondria seemed to become more responsive and efficient at handling energy demand. Now imagine an older individual whose training output has been limited for years because fatigue arrives too early, recovery capacity is poor, and mitochondrial efficiency has drifted downward. Even a modest improvement in energetic handling could suddenly increase their ability to train consistently. Consistency compounds. People underestimate that. Sometimes the intervention is not directly building muscle. Sometimes it’s removing friction that prevented adaptation from happening in the first place. This is where things get interesting for strength coaches because a lot of athletes who plateau are not necessarily failing because the training stimulus is insufficient. Sometimes they’re accumulating energetic noise faster than they can resolve it. Recovery kinetics are impaired. Sympathetic tone stays elevated. Mitochondrial quality control lags behind mechanical demand. The athlete experiences this as poor recovery, flattening performance, poor pumps, excessive soreness, declining motivation, disrupted sleep, or reduced training density. Then everyone argues about programming variables while completely ignoring the cellular environment the program is landing on. That’s part of why mitochondrial compounds are generating so much interest. Not because they bypass adaptation, but because they may improve the quality of adaptation signaling. MA-5 becomes fascinating through this lens too. Mitochonic acid 5 appears to support ATP synthase oligomerization and supercomplex organization. That sounds incredibly technical until you simplify it visually. Imagine a city power grid where all the substations are poorly coordinated and partially disconnected. Energy can still move, but transmission becomes inefficient and unstable. MA-5 appears to improve organization within portions of the mitochondrial machinery itself, potentially improving local ATP generation even under dysfunctional conditions. Again, this is not “free muscle.” It’s potentially cleaner infrastructure. The distinction matters because people often assume ATP itself is the limiting factor for hypertrophy. Sometimes it is. Often it isn’t. Muscle growth is constrained by many overlapping systems simultaneously. Mechanical tension, amino acid availability, satellite cell activity, nervous system output, sleep architecture, local inflammation, connective tissue tolerance, glycogen status, blood flow, oxygen delivery, hormonal environment, mitochondrial redox handling. And importantly, the body is protective. Biology does not casually hand out hypertrophy because hypertrophy is metabolically expensive. Bigger muscle requires more maintenance, more oxygen, more substrate demand, more recovery demand, more structural management. Your body has to believe the environment supports carrying that tissue. That’s why some people can dramatically improve mitochondrial function and still only see modest changes in actual muscle cross-sectional area. The adaptation ceiling may have moved somewhat, but the stimulus and environmental inputs still determine whether the body chooses to build tissue. MOTS-c is another really interesting example because it shifts the conversation toward signaling rather than pure energetics. MOTS-c is encoded within mitochondrial DNA itself and behaves almost like a stress-responsive metabolic messenger. Exercise appears to increase it. Energy stress appears connected to it. In rodent models it influences glucose handling, metabolic flexibility, and some atrophy-related signaling pathways. This is where people often get lost because they hear phrases like “myostatin reduction” and immediately jump to fantasies of explosive hypertrophy. But signaling is contextual. Reducing atrophy signaling is not the same thing as inducing maximal growth signaling. Those are different biological conversations. A starving organism might reduce tissue breakdown without aggressively building new tissue. An endurance athlete might improve metabolic resilience without significantly increasing muscle size. A recovering patient may preserve muscle quality without experiencing bodybuilding-level hypertrophy. Muscle quality and muscle quantity are not identical concepts, and honestly that’s something clinicians should probably think about more carefully. Sometimes the biggest functional improvement comes from improving mitochondrial efficiency, neuromuscular coordination, metabolic flexibility, and fatigue resistance rather than adding huge amounts of tissue. A patient climbing stairs without crashing afterward matters. An aging athlete maintaining power output matters. A strength athlete recovering between sessions faster matters. The visible outcome is not always the entire outcome. Practically, this means mitochondrial interventions probably need to be viewed through context and sequencing rather than hype. If someone is profoundly sleep deprived, severely inflamed, sedentary, under-recovered, hyperglycemic, nutrient deficient, and sympathetically overdriven, adding mitochondrial compounds without changing the environment may produce disappointing results. The mitochondria are responding to the total environment. That’s why some people respond incredibly well while others barely notice anything. The signal lands differently depending on the terrain. For strength coaches, this changes how we think about readiness and adaptation density. An athlete who can maintain mitochondrial efficiency under repeated training stress may tolerate higher quality volume, maintain force production deeper into sessions, and recover faster between exposures. Conditioning work may stop interfering as aggressively with strength expression. But this also means these compounds can potentially mask fatigue if coaches are not paying attention. An athlete feeling less fatigued does not always mean structural recovery has fully occurred. The energetic system may improve before connective tissue remodeling catches up. Coaches who understand this tend to make better decisions because they don’t confuse improved sensation with unlimited recoverability. The best coaches are not just managing muscles. They’re managing adaptive capacity, and that includes bioenergetics. One thing I think the industry gets very wrong is the obsession with forcing biology instead of improving conditions for biology. People want the magic hypertrophy peptide, the limitless energy stack, the cellular cheat code. Most biology does not work that way. Most interventions act more like dimmer switches than light switches. They shift probability. They improve resilience. They reduce friction. They improve signaling clarity. They widen adaptation windows. Sometimes that creates dramatic outcomes over time because consistency and recoverability improve enough to compound, but the compounding is still being earned through intelligent inputs. Training still matters. Nutrition still matters. Circadian rhythm still matters. Mechanical tension still matters. The mitochondria are not isolated engines floating independently from the rest of physiology. They are deeply integrated sensors constantly responding to movement, nutrients, stress hormones, inflammatory signals, light exposure, oxygen tension, temperature, and nervous system state. That’s why I think the future of performance and longevity is probably less about finding the “best molecule” and more about environmental orchestration. What combination of signals tells the body adaptation is safe, worthwhile, and sustainable? That’s the deeper question, and honestly it’s probably the more interesting one too.