Muscle Gain Supplements | Triage Thoughts Ep. 253

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Muscle gain is one of the most heavily marketed corners of the supplement industry. If you have set foot in a gym in your teens or twenties, you have almost certainly been sold the idea that the next powder, capsule or stack is the thing that will finally put kilos of lean tissue on your frame. This is also the area of supplementation where the products actually do the least. Most of what gets sold under the “build muscle” banner, when you read the label honestly, is a powdered version of something you could have eaten anyway. Muscle is built by training that progressively overloads the muscle, enough food, enough sleep, and lifestyle practices that do not undo the rest. The supplements that earn their place do so by improving one of those, not by adding some new anabolic lever of their own.

This article is the companion to our Triage Method Podcast episode on muscle gain supplements.

Muscle gain is a side effect of training, not the goal of training

When you train for muscle gain, you are not directly building muscle in the way an advert implies. You are progressively overloading the muscle in rep ranges that suit hypertrophy, somewhere in the region of 6 to 15 reps as a rough average. The adaptation you are actually chasing is getting stronger in those ranges. Muscle gain happens as a side effect of that adaptation over time.

That tells us where supplements can and cannot intervene. There are really only two doors a supplement can come through. It can give the body more of the raw materials it needs (food, basically), or it can help you train better (the around-workout supplements we covered in the previous episode). Almost nothing on a supplement shelf does anything outside those two doors, and most of what does sits in the first door.

In an otherwise active person, simply eating more food, especially more protein, will produce a small amount of muscle gain on its own, even without a dedicated training programme. It is not as good as combining food with proper training, and it is not optimal, but it is a useful frame. Food is the primary lever, before any product in a tub.

Three domains: stimulus, signal, substrate

Supplements that have any role in muscle gain are nudging one of three things: the stimulus, the signal or the substrate.

The stimulus is the training itself, plus the around-workout supplementation that lets you train harder or recover better. Better programming, better effort and a sensible pre-workout sit here.

The signal is muscle protein synthesis. To build muscle, synthesis has to outpace breakdown over time. Protein feeding modifies that signal. Anabolic drugs amplify it dramatically. Most supplements do not really touch this lever at all.

The substrate is the energy and the raw material. Muscle building is an energy-intensive process, so we need to be at least at maintenance calories, ideally in a modest surplus, to maximise the outcome. We also need enough amino acids on hand to act as the building blocks.

Once you can see those three domains, it becomes much easier to spot when a product is selling you a story that does not match what it actually does.

Protein powder is just food

Protein powder is the supplement that has been marketed at lifters more than any other, and it is the most defensible of the lot, provided you understand what it really is. Whey, casein, beef, plant blends, all of them are simply the isolated protein fraction of another food, generally with a fairly complete amino acid spectrum.

It fits primarily in the signalling domain (higher overall protein intake supports muscle protein synthesis), and partly in the substrate domain (it contains calories). However, there is nothing inherently anabolic about a scoop of whey that you would not also get from an equivalent amount of protein from a whole food such as beef. If anything, a diet centred on whole protein sources gives you a broader nutrient profile alongside the protein.

Some of the older marketing made claims around whey being uniquely anabolic, or casein being essential before bed to keep you in a positive nitrogen balance overnight. There is a kernel of mechanistic truth to both, but in the context of a diet that already hits a reasonable total protein target, you are unlikely to see any meaningful muscle gain difference between 200 grams of protein from powder and 200 grams from varied food sources.

Where protein powder genuinely earns its place is in two scenarios. First, if you are struggling to hit a sensible protein target, somewhere in the region of 1.6 to 2.5 grams per kilogram of bodyweight, a powder makes that much easier. Second, if your schedule means a real meal is not realistic after training, a shake covers the gap before the next proper meal a few hours later. Treat it as food in a more portable form, and you will use it about right.

Younger trainees get the heaviest muscle gain marketing of anyone, so this point is worth hammering bluntly. If your total protein across the whole day is too low, none of the rest of this matters. EAAs in the workout, a shake afterwards, a casein before bed, all of it is polish on top of a target you have not actually hit. Hit the day first.

BCAAs, EAAs and isolated amino acids

If protein powder is just food, then branched-chain amino acids (BCAAs) and essential amino acids (EAAs) are reduced further. Essential amino acids are the ones the body cannot make from scratch and so have to come from the diet. BCAAs are a smaller subset of those. The headline ingredient in the conversation is leucine, which is a strong trigger of muscle protein synthesis through mTOR, with HMB sold on the back of the same story as a leucine metabolite.

The mechanistic reasoning is not total bullshit. In the absence of outcome data, it is reasonable to look at leucine triggering muscle protein synthesis and think there might be a way to exploit that. Why not add more leucine to every meal and bolster the effect? It is a fair question to ask before the outcome trials come in. The outcome trials are what eventually decide it, and they do not back the inference.

The signal has a ceiling. Once muscle protein synthesis is switched on and the muscle is full of amino acids, supplying more does not push the process any further. The factory is running at the rate it can run. You then need a refractory period before the next stimulus can ramp it up again. Stacking more leucine, or more BCAAs, on top of an already adequate meal does not give you extra muscle.

You also cannot bias muscle building with a sub-fraction of protein. Building muscle needs the full spectrum of amino acids. If any one of them is limiting, the process stalls. You cannot aim for a 200 grams per day protein target and try to make it up with leucine alone, then expect to come out ahead.

The hierarchy is whole protein sources first, with high-quality reduced forms like whey alongside them, then essential amino acids, then branched-chain amino acids, then single isolated amino acids at the bottom. The clearest case where EAAs might genuinely add something is a more restrictive plant-based diet where the amino acid spectrum of a given meal is incomplete. Even there, the older nutrition advice works first. Mix your plant sources. Beans and rice together give you a far more complete amino acid profile than either on its own, and that usually handles the issue before EAAs need to enter the conversation.

The pattern in the field is the same as with protein powder, only sharper. EAAs or BCAAs during the workout, a shake afterwards, and a daily protein intake that is just too low across the day. The around-training drinks do not rescue an under-protein diet.

Mass gainers and meal replacement shakes

Mass gainers and meal replacement shakes are, for our purposes, the same thing. Powdered meals. Protein, carbohydrate, sometimes a bit of fat, blended together and flavoured. The branding sells them as something special (Serious Mass, Hyperbolic Mass and the rest), but when you read the ingredients you are looking at protein powder, a carbohydrate source, sometimes a fat source, and that is essentially it.

There is nothing wrong with that, as long as you know what you are buying. They are a way to take in a large dose of calories quickly, which can be genuinely useful if you have a hard time eating enough food.

Before reaching for a tub, look at the whole foods you are choosing. A lot of people who struggle to hit calories are eating high-satiety foods that fill them up before the numbers add up. Swap potatoes for sushi rice, for example, and the same calorie target suddenly goes down a lot more easily. A meaningful proportion of the “I need a mass gainer” cases resolve when the food selection changes.

If you do want a powdered route, there is no real difference between buying a pre-made mass gainer and making your own. Early efforts at homemade gainers tend to be less than scientific (raw eggs, oats, peanut butter, a few scoops of whey, and on the odd misguided occasion, fish oil tipped into the smoothie because it felt hardcore at the time). The better template is a scoop or two of whey, a serving of oats, some frozen blueberries or banana, a splash of milk or yoghurt, a teaspoon of peanut butter. That gets you to 500 to 800 calories with a broader nutrient profile, often at less cost per gram of protein or carbohydrate than the branded tub.

Watch what is actually in the tub on the quality side. Some of the cheaper mass gainers, and some homemade equivalents, are essentially just table sugar and whey. That will hit the calorie target, but if you are trying to gain you are by definition in a surplus, and piling refined sugar on top of a surplus is not a metabolically sensible way to feed that gain. Oats and whey blended together, or fruit and yoghurt and whey, gives you the same calories with a much better nutritional profile.

The other thing to watch with branded tubs is the marketing layer. The “also contains creatine” line gets stamped on a lot of them, but the dose is often around half a gram per serving, which is well below the level that does anything. The wider pattern across the industry is the same. Sub-therapeutic sprinkles of whatever ingredient is currently trendy, dropped into the formula so the tub can carry the name on the label. It is a marketing strategy, not a useful dose. If you want creatine, buy creatine on its own and dose it properly.

Creatine

Creatine is the one supplement on this list that consistently earns its reputation. We are both fans of it. The mechanism is straightforward. Creatine supports the short-term, high-power energy system in the muscle, which is what most resistance training draws on. With more creatine stored in the muscle, you tend to get an extra rep or two on a given set, a touch more strength, a touch more performance. Better training over time tends to lead to more muscle. The lever sits squarely in the stimulus bucket, with a foot in the substrate bucket as well.

There is also a small effect on muscle size from creatine pulling more water into the muscle cell. That shows up on a DEXA scan as lean mass, and there is a reasonable case that the increased cell swelling may itself be a mild hypertrophic signal. The main reason to take creatine, though, is the training effect. Over months and years, slightly better sessions compound into more muscle.

Testosterone boosters

The shelf-bought “natural testosterone boosters” are where the marketing gets the most aggressive and the actual return gets the smallest. Some ingredients can nudge elements of the male hormone panel, but the changes are small if they happen at all, and the translation from those small changes to any meaningful difference in muscle gain or strength has basically never been shown convincingly.

Once you are within the normal range of testosterone, modest changes do not really move the needle. A 5% bump, which is generous for what these products typically do, is not going to make you feel different, train differently, or build more muscle. Testosterone varies meaningfully across the day, across weeks, with sleep, with stress, with bodyweight. Within a healthy range, the average over time matters far more than the individual reading on a given morning.

Total testosterone on a blood panel is not the whole picture. You can have a perfectly normal total and a low free testosterone, and there may be something in your diet, body composition or lifestyle that you could change to bring that up. Normal on the panel is not always the end of the conversation, particularly if symptoms suggest otherwise.

If your testosterone is clearly low and you have the symptoms to match, that is a medical conversation, and very often a case for testosterone replacement therapy under a doctor. It is not a job for a high-street booster, and it is not just a job for a few lifestyle tweaks. We are not anti-TRT in that context. We are anti the pretence that a shop-bought testosterone booster is in the same conversation as it.

Exogenous testosterone is a different animal entirely, and the administration profile is part of why. Natural testosterone has a daily rhythm. It peaks in the morning and drifts down across the day, and the body’s signalling is set up around that pattern. Inject testosterone and you get a flatter line at whatever level you are dosing to. Sex hormone binding globulin also shifts when you supplement exogenously. A flat 700 on injected testosterone and a natural 700 that peaks in the morning and drifts down across the day are not the same physiological situation, even though the total reads the same on paper.

The spread within the normal range is also worth taking seriously. Bottom-of-range and top-of-range are not the same place to live, and climbing from one to the other can genuinely matter, both directly and indirectly. You will probably feel more motivated, train harder, sleep better, eat better. The lever there, however, is not the pill. We have moved clients from the lower third of the testosterone range to the top third simply by getting their sleep, training, diet and stress in order, with no testosterone-targeting supplement involved at all.

The cheapest, highest-yield move in this whole conversation is sleeping an extra hour or two. That alone tends to do more for testosterone than any booster. Add to that eating at least at maintenance calories, ideally a little above when the goal is gain, and you have already pulled the two biggest levers available. Good general diet quality, micronutrient adequacy, stress management and general health stack on top of that. You are stepping over dollars to pick up pennies if you skip all of that and reach for a tub.

The diminishing returns get sharper from there too. The same work that lifts you from the bottom of the range to the top of it also makes any later booster yield less than it ever could have done. Someone on poor sleep, an under-eating pattern and no training might see a modest bump from a pill. Someone who has already got all of that right, and is sitting in the top 90% of where they could be, is more likely to see something like a half-percent on top, if anything.

So what actually builds muscle?

The supplement industry has noticeably moved its pitch in recent years. The old positioning was “this product builds muscle”, and consumers eventually got wise to it, because most of those products plainly did not. The newer pitch is “this product improves your training”, which is a fairer framing, and it is part of why the around-workout supplements deserve more of your attention than the muscle-gain-branded ones.

The foundation has not changed. Train hard and progressively overload in rep ranges suited to hypertrophy. Eat enough calories overall, at maintenance or in a modest surplus. Hit a sensible protein target, somewhere in the region of 1.6 to 2.5 grams per kilogram of bodyweight. Sleep eight to nine hours a night. Manage stress. Keep general diet quality high so the micronutrient picture is covered, and keep general health in a decent place. None of that is a tagline, but it is what actually moves the muscle.

Do all of that, and there is a genuine place for creatine sitting on top, with protein powder or a mass gainer earning their keep as convenience tools where either solves a real problem in your day. Everything else is a small nudge on a foundation that has to be there anyway.