How to Build Muscle on TRT (What the Studies Actually Show) | Weekly Q&A

Welcome back to Q&A 10. This one covers a lot of ground, from rebuilding strength after years off to how testosterone actually drives muscle growth to mitochondrial peptides and injection technique, so rather than skim the surface of all ten questions, I want to go deep on the pieces that matter most and that the video moved through quickly.

Before any of that, a quick update on the business side. On the 10th of August, we're gonna be going up to Pompano Beach, Florida to meet with the folks up at Lightning Nutra. That's the company behind our supplement line, and the trip includes walking through the full production process from raw materials to finished product. A couple days after that, there's a visit to a peptide manufacturing lab in Naples. And hopefully during that trip, we'll be able to make a much more solidified relationship where most of, if not all of our peptides will be 100% manufactured here in the US, which means that all the APIs, the raw materials will be imported just like any other pharmaceutical company, except the difference is, they'll be lifelies produced, labeled, and stored, shipped from right here in the US, which is really cool. And also regarding testing, we also have a really cool, potentially life-changing thing that's coming up involving third-party testing here in the US. So make sure you stay tuned for that.

Now let's get into the actual teaching portion of this.

The very first question I have here is, how do I rebuild strength after years of being sedentary? Slower than you remember, that's what I'll say. And that answer sounds simple, but there's a real physiological reason behind it that goes beyond just being out of practice.

There's a lot of situations where guys and gals were in great shape in their younger years, maybe their 20s or even their 30s, and then they took a significant amount of time out of the gym, kind of lost their way, gained a bunch of weight, and now they're trying to get back in there, and they're having a harsh realization. The realization is that muscle memory, while real, doesn't mean what most people think it means. Your muscles do retain extra nuclei from prior training, and those nuclei make it easier to rebuild compared to someone who never trained at all, but "easier" does not mean "fast" and it absolutely does not mean "the same as before." Your tendons, ligaments, and connective tissue have been deloaded for years, and unlike muscle fibers, those structures adapt on a much slower timeline.

The problem typically isn't the fact that they're training too little, right? So what I would say for you is if you're sedentary, just getting back into the gym, you need to release yourself from the expectations that you're going to perform as well as you used to, okay? That's just not realistic. Most injuries in this population come from loading too aggressively too soon, because the muscles can handle it before the connective tissue can. Your quad might be ready for 225 on a squat after six weeks back, but the patellar tendon that anchors it to your knee is still operating on a timeline measured in months. Push past that mismatch and you end up lifting zero pounds while you recover from something that was entirely preventable.

The other piece here is about aligning your metrics with your actual goals. In fact, I was just having a conversation with a woman who she's on Reddit True Tide and she's saying that she's struggling to lose the extra five or 10 pounds that she wants to lose. She'd already lost 40 pounds, felt good, performed well, looked visibly different, but was fixated on the scale. Her actual goal was to build muscle and tighten up her lower body, which means the scale might need to go up or stay flat while her body composition changes. Using the wrong metric to measure the right goal will drive you insane and eventually drive you out of the gym entirely.

Now the bigger question, and the one the video spent the most time on: how do you maximize muscle while on TRT?

The foundation comes first and it never leaves, so you need to be following a training program, tracking your food and especially your protein intake because I know eating the amount of protein that is required to put on muscle, which is in my opinion one gram per pound of your body weight or lean body weight or however you wanna measure it, is a genuinely large amount of food and there is no getting around that requirement if you actually want results. And then sleep, which everyone has an excuse for skipping and which no excuse makes less important. Okay, so now that we have that out of the way, that's the foundation, that doesn't change, it doesn't go away.

Here's where it gets interesting, and where a specific study tells the story better than any advice can. Researchers took 61 healthy young men, completely shut down their natural testosterone production, then split them into five groups and gave each group a different dose of testosterone for 20 weeks. Food and protein were held constant across all groups, and none of these men were assigned any kind of training program, so whatever changes happened to their bodies came purely from the testosterone itself.

They measured muscle growth in the thigh, and the results traced an almost perfectly straight line from lowest testosterone to highest.

Okay, so what does that mean? Well, the group that had the least amount of testosterone at 253 nanograms per deciliter actually lost muscle in their thighs, meaning they got smaller. And then for the group with 306 nanograms per deciliter, they saw a barely measurable increase in the size of their thigh muscle. At 542, there was a modest gain, and what's interesting is that at 1,345, which is about double the group before it, they saw roughly double that increase in thigh muscle size, and the highest group at 2,370 nearly tripled the gain.

So muscle growth in this study scaled linearly with testosterone level, even without training, even without dietary variation, which is a clean demonstration of the direct anabolic effect of testosterone on skeletal muscle tissue.

Now, why does this matter for the guy on TRT? Because a man on a properly managed TRT protocol is going to have blood levels somewhere between roughly 542 and 1,345 nanograms per deciliter at the absolute highest end, and most prescribing doctors target 800 to 1,000, which places TRT squarely in the middle of this curve and not at the top, so you are going to build muscle on TRT but you are not going to build it at the rate of someone running levels above 2,000. Managing that expectation matters, because TRT doses give TRT results and that's genuinely a good thing if your goal is long term health rather than short term cosmetic transformation, and chasing a higher number just for the gains is a different conversation entirely. Are you optimizing your performance for TRT or are you trying to come up with an excuse to give yourself a 2000 nanogram per deciliter testosterone level so you can see better results and feel like you can run through a fucking wall? If this is what you wanna do, that's your prerogative, but as a TRT clinic, we can't help you. The real optimization happens when you stop staring at the testosterone number and start looking at the full panel: GGT for liver function, cystatin C for kidneys, hsCRP for inflammation, ApoB for cardiovascular risk, blood pressure, sleep quality, cognitive function, because those are the markers that actually tell the health story and show you whether things are moving in the right direction.

One more piece that the study implies but doesn't say outright: most men starting TRT are carrying too much body fat to prioritize muscle gain first. Insulin resistance, which is extremely common in men with elevated body fat, actively works against muscle building by rerouting excess calories toward fat storage rather than muscle tissue. Losing the body fat first improves insulin sensitivity, restores healthier hormonal signaling across thyroid and growth hormone pathways, and sets the stage for far more productive muscle gain later. You will also look more muscular at a lower body fat even before you've added any new tissue, because the muscle you already have becomes visible.

And so for somebody who's over 40, we have this, we'll say muscle building limitation or we'll say anabolic resistance that's happening. This is the concept of needing more of the amino acid leucine to trigger the mTOR signaling pathway, which is essentially the switch that tells your body to begin building new muscle protein. In your 20s, a moderate hit of protein flips that switch easily. By your 40s and beyond, the switch requires a stronger signal and the threshold climbs in a way that's less like a dimmer gradually fading and more like a lock that now requires a bigger key. Dense protein sources like whey, eggs, meat, and dairy carry more leucine per gram than plant proteins, which is why the type of protein matters more as you age, not just the total amount.

The downstream consequence of this anabolic resistance is a slow, quiet loss of muscle mass over the decades, which lowers your resting metabolic rate, which makes it easier to accumulate body fat, which further impairs insulin sensitivity, which makes muscle building even harder. It's a cycle that accelerates unless you actively intervene with consistent resistance training and adequate protein. For people over 40, fat loss becomes more of a side effect of doing those two things correctly than something you chase directly through dieting.

Question number four, what does SS31 do for metabolism and recovery? Now SS31 isn't necessarily directly influencing your body's metabolism or ability to recover, okay? So let me explain exactly what it's doing. Your body runs on something called ATP, which is the molecule every cell uses as energy currency. ATP is produced inside mitochondria, specifically through a series of steps called the electron transport chain. That chain sits inside a specialized fat membrane called cardiolipin, and cardiolipin's job is to hold the electron transport chain in the correct shape so it can function properly.

Over time, through aging, metabolic stress, poor sleep, insulin resistance, alcohol, and just the accumulated wear of living, that cardiolipin membrane gets damaged. When it does, electrons start leaking off the transport chain as they move through the process, and those leaked electrons become something called reactive oxygen species, which are essentially rogue particles bouncing around inside the cell causing further damage and triggering inflammation. More damage to cardiolipin means more electron leaks, which means more reactive oxygen species, which means even more damage. The whole system degrades in a self reinforcing loop, and ATP production drops to maybe 60 or 70 percent of what it should be. Since ATP powers literally every process in your body, from brain function to digestion to heartbeat to muscle recovery, a drop in production means a drop in everything.

SS31 goes in and repairs that cardiolipin membrane, which is the whole point of the peptide and the reason it connects to metabolism and recovery at all rather than acting on those things directly. Researchers took 39 adults aged 16 to 85 with confirmed poor mitochondrial function, gave them a single infusion of SS31, and measured energy production in living muscle tissue, and it climbed across every group they tested.

You can also pair this with MOTC. And so historically, I've had videos where I said you should do SS31, then MOTC. After the more recent studies that we found on MOTC, we've also found that MOTC, in addition to activating AMPK, which is basically telling your cells to reach out, pulling fat cells and convert that to glucose. MOTC also sends a signal to the nucleus of cells to produce new healthy mitochondria. So when you run SS31 and MOTC together, you're simultaneously repairing the damaged machinery and building new machinery. Cleanup crew and construction team working at the same time.

For people under 40 who try these and feel nothing, that's probably a good sign. If there's minimal damage to repair, there won't be a dramatic change in how you feel, and SS31 works more like a gradual cellular restoration that unfolds over at least eight weeks rather than something you feel the morning after your first injection.

There are a few more things worth getting into here, even if briefly. Is thymusin alpha-1 worth it for immune function? Okay, so what thymusin alpha-1 does is it's mimicking a signal that comes from your thymus, which is your gland here that modulates your immune system. So that's what thymusin alpha-1 is doing. It amplifies the production of specific T cells, and the studies show it works for people who are actually sick, dealing with immune conditions, chronic illness, or significantly declining immune function with age. If you're healthy, the evidence does not support using it proactively, and you probably don't want to be interfering with the gland that monitors T cell production when there's nothing wrong with it.

Why did my GLP-1 stop working even though my body is still changing? The first thing I'm gonna say on this question is it's kind of a weird one, but I don't understand why that's a problem. Is the goal for you to suppress your appetite indefinitely? Because I'm assuming that's what you mean by GLP-1 stop working. If your body is still changing, still losing fat, still improving, then the tool is doing what it should, because suppressing your appetite was never really the destination anyway, it was only ever a mechanism to help you eat less while you built the habits of tracking food, prioritizing protein, and training consistently, and if those foundations aren't in place, no peptide dose adjustment is going to save you from the fact that you never learned how to eat properly.

On the peptide beginner question, the framework is simple: fat loss peptides like rettifrutide, growth hormone peptides like tessamorelin or actual growth hormone, healing and recovery peptides like BPC-157, TB-500, typically used together as the Wolverine stack, you also have GHK-CU, which is awesome for skin health, collagen repair. Then mitochondrial peptides like SS31 and MOTC, and immune support peptides like thymusin alpha one. You're gonna see like AOD9604, which is a huge waste of money. Don't start with a peptide, start with a goal, figure out what gap exists in your health that your foundations aren't filling, and use the peptide to address that specific gap.

And on injection technique, which sounds intimidating but is actually straightforward: the only thing that really matters when it comes to all that is, can the thing that I'm injecting get through the needle? That's it, right? So if I'm doing testosterone and I have like cotton seed oil, getting it into a 31 gauge insulin needle is gonna be very difficult. For testosterone, a 27 gauge needle with enough length works perfectly. For peptides, a 28 gauge preserves enough sharpness after puncturing the vial that it still slides into skin without discomfort. You can use a 5 16th inch, which is very short, it's like this long, and it's perfect, okay? As far as rotation, rotating sites, this is actually more important, I think, than anything else, just because if you're injecting every day especially, you wanna make sure that you're not building up scar tissue. Delts, ventral glute, glute, flanks, rotate consistently and you won't have problems.

The thread that runs through every one of these questions is the same. People want the peptide, the protocol, the injection technique to be the thing that makes the difference, and those things do matter, but they only matter on top of a foundation that most people haven't built yet. The training, the protein, the sleep, the honest self assessment of what your actual goal is and whether your daily behavior matches it. Every shortcut in this space is really just a tool, and a tool only works when the person holding it knows what they're building.