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9 contributions to Castore: Built to Adapt
The Two Numbers That Reveal Whether You’re Recovering or Breaking Down
When people talk about “redox,” they often imagine a simple on/off switch: too much oxidation is bad, too little is good, and antioxidants somehow fix everything. But redox isn’t a static level. It is a movement, a rhythm, a pulse. It is the cell’s equivalent of breathing: electrons are passed, accepted, handed off, and recycled in a constant dance that allows mitochondria to do the one thing that keeps everything else alive create a stable flow of energy without generating destructive chaos. When that movement slows or stops, the body becomes metabolically stuck. It can’t shift gears. It can’t adapt. It can’t repair. And one of the simplest, most reliable ways to know whether that electron pulse is moving or jammed is something most people overlook entirely: your resting lactate and your resting heart-rate variability. These two markers act like a window into how well mitochondria are moving electrons through the respiratory chain and how much stress your nervous system is carrying while trying to compensate. To understand this, it helps to picture metabolism the way you might imagine traffic moving through a city. If everything is functioning well, cars move smoothly through intersections. Some lanes slow down at certain times, others accelerate, but the rhythm remains fluid. In the mitochondria, electrons are the cars, and the electron transport chain is the road network guiding them from one stop to the next. When the road ahead is blocked because of infection, stress, injury, hypoxia, toxic burden, inflammation, or even intense training the cars have nowhere to go. They pile up. The system becomes backed up. In cellular terms, that backup shows up as elevated NADH relative to NAD+, sluggish electron transfer, a reduced ability to pass electrons to oxygen, and an emergency diversion of energy processing toward lactate production because it’s the only exit ramp left open. This is why elevated resting lactate is so revealing. A healthy cell at rest does not need to rely heavily on lactate production. Lactate is not the enemy in fact, it’s a valuable metabolic currency during exercise but at rest, consistently elevated lactate is like seeing rush-hour gridlock at midnight. Something is blocking the flow. And when lactate stays elevated several mornings in a row, it often means the mitochondria can’t clear electrons efficiently, so cells are forced to rely on the “quick and dirty” energy pathway instead of the high-efficiency mitochondrial one. The body becomes stuck in a pseudo-hypoxic state where the cell is not lacking oxygen, but from the mitochondria’s perspective, it might as well be.
1 like • 7d
@Katharina Clig you’re the best, I missed that update so thank you for making sure I saw it! Have a great weekend 😃
1 like • 6d
@Katharina Clig I'm right there with you lol. My wife always gives me a hard time because I'm so keen on trying everything when it comes to health tracking, tools, testing, interventions, etc.
Why Death By 5’s Might Be The Most Efficent Training System You’ve Never Tried
Most lifters chase numbers. A heavier squat, an extra plate on the press, another rep on the pull-up bar. But chasing numbers alone doesn’t guarantee growth. True progress comes from mastery from owning every inch of the rep, from creating conditions where the muscle has no choice but to adapt. That’s where Death by 5’s enters the picture. At its core, Death by 5’s is brutally simple: a single set broken into three phases that hit all the major triggers of hypertrophy in sequence. In just one extended effort, you layer mechanical tension, stretch-mediated signaling, and metabolic stress the three pillars of muscle growth. Think of it as condensing a week’s worth of stimuli into a single block of time. The Set Structure A Death by 5’s set unfolds like this: 1. Five Paused Reps with Slow Eccentrics – a 5-second pause at mid-range, then an explosive concentric, followed by a 5-second eccentric. This primes the muscle with mechanical tension, the most reliable driver of hypertrophy. 2. Five One-and-a-Half Reps – working the stretched position with partials and controlled eccentrics. Here you tap into stretch-mediated hypertrophy, loading titin and amplifying signaling pathways that only activate under elongation stress. 3. Rep-Out to Failure – normal tempo reps until you can’t move the weight. This phase maximizes metabolic stress, flooding the muscle with metabolites and ensuring full motor unit recruitment. By the end, every fiber has been called into play, every growth signal has been fired, and the muscle has been pushed through all three hypertrophy mechanisms in one sequence. Why It Works What makes Death by 5’s so powerful is its time efficiency. Traditional programs might spread tension work, stretch emphasis, and pump training across multiple sets or even multiple sessions. Death by 5’s compresses all of it into one structured attack. It’s not just about saving time; it’s about stacking stimuli so the muscle can’t hide, adapt, or coast through the set.
1 like • 6d
@Drew Wurst I've been focusing SO much more on proper breathing, especially nasal breathing where it makes sense, and I'm finding it helps me focus much better and gives me a great way to make sure i'm taking my time with to slower, more intentional movements. I think you're spot on!
Why Diabetes Starves the Brain — and How Ketone Esters + Plasmalogens Can Switch the Lights Back On
Diabetes and dementia are linked through a simple idea: the brain runs on energy, and diabetes disrupts the brain’s ability to use that energy. When the brain can’t make enough fuel, the neurons begin to slow their firing, mismanage inflammation, misfold proteins, lose membrane integrity, and eventually break down networks involved in memory, mood, coordination, and cognition. Dementia isn’t one event it’s a slow starvation paired with redox imbalance and membrane breakdown. Think of the brain like a city that runs on electricity. Glucose is the main power source. Insulin is the key that lets glucose into the cell. In diabetes especially Type 2 the key doesn’t work well. This creates “brain energy scarcity.” When neurons can’t pull glucose in effectively, they start producing large amounts of reactive oxygen species, shift into survival mode, and stop repairing themselves. Over time, this energetic bottleneck causes synapses to weaken, mitochondria to swell and fragment, and microglia to become overactive. This is why many experts call Alzheimer’s “Type 3 diabetes.” On a molecular level, poor glucose utilization collapses mitochondrial membrane potential, the voltage that drives ATP production. This voltage is the “life force” of the neuron. When it drops, the brain’s ability to manage calcium, recycle damaged proteins (autophagy), and maintain neurotransmitter balance all fall apart. Insulin signaling also regulates synaptic plasticity, serotonin production, acetylcholine balance, and BDNF. So poor metabolic signaling doesn’t only starve neurons it also makes them “forget how to learn.” Diabetes also increases levels of advanced glycation end products (AGEs), which are like sticky caramelized proteins that physically gunk up receptors, stiffen membranes, and activate inflammation. Blood vessel health declines, reducing oxygen delivery. Redox balance swings toward chronic oxidative stress. Over years, this combination erodes the frontal lobe, hippocampus, and basal ganglia structures tightly tied to memory, motivation, movement, and personality.
1 like • 7d
And your comment about using them on Jeter triggeeed my memory that you had posted about an issue with him (I had seen the email notification about the post but hadn’t logged in to read it yet). Just read through the post and I’m so sorry he’s going through that. I have had dogs my whole life and have two amazing pups right now. Watching them suffer is harder than going through it your leg in so many ways. I’m really interested to hear how he responds to his new protocol and I’m sending nothing but healing vibes his way. Hope he’s able to bounce back fast and with as little pain as possible 🐶🐾 He’s very fortunate to have you looking after him!
1 like • 7d
Last thing I’m going to tack onto this conversation… I watched a podcast with Chris where you talked about Humanin supporting glucose homeostasis in the brain. Curious if it’s worth tacking on here?
Methylene Blue, Urine Color, and What It Reveals About Redox, Mitochondria, and Systemic Stress
Methylene blue is one of the most unusual therapeutic molecules in medicine because it behaves like a living sensor inside the body. It changes color depending on its electron state, donates and accepts electrons depending on mitochondrial demand, bypasses damaged respiratory complexes, and flows directly into the bloodstream, nervous system, and organs as a redox-active dye. While people know it turns urine blue, they rarely understand why that color appears, why the duration changes, and how those changes can reveal meaningful information about mitochondrial efficiency, liver and kidney function, and global redox tone. The truth is that the color shift is not just a cosmetic effect; it is a visible expression of the electron flow inside your cells. The speed at which urine returns to its normal yellow color becomes a rough, experiential marker of how well your body’s redox machinery is cycling. To understand this, the first step is recognizing that methylene blue exists in two major states: its oxidized form (bright blue) and its reduced form, leucomethylene blue, which is colorless. These two forms constantly convert into one another based on the availability of electrons. When methylene blue accepts electrons, it becomes colorless. When it donates electrons, it becomes blue again. This redox cycling is what makes methylene blue so therapeutically valuable it acts like a smart shuttle that smooths out problems in the electron transport chain, especially when complex I or III are underperforming. When mitochondria are stressed, over-reduced, under-fueled, oxidatively burdened, or deprived of NAD+, methylene blue helps buffer the system by accepting excess electrons or donating needed electrons. It reduces oxidative stress, stabilizes the flow of energy, and helps maintain membrane potential. But because it is also a dye, these internal dynamics show up externally, especially in urine. The moment methylene blue enters the bloodstream, the body begins metabolizing it in the liver, reducing it, cycling it, moving it into tissues, and eventually clearing it through the kidneys. The exact hue you see in the toilet depends on two things: how much of the molecule remains in its oxidized blue form versus its reduced colorless form, and how concentrated your urine is. Dark, heavily oxidized methylene blue produces a vivid blue-green color. When most of the MB is reduced and colorless, urine appears normal or lightly tinted. This is why two people taking the same dose can see dramatically different colors. The real insight emerges when you track how long the color lasts.
3 likes • 17d
This is such god timing. I was searching the internet for resources about this very question yesterday (how to use the color as a way to determine your body’s ability to utilize MB, and therefore as a marker for metabolic health and efficiency). While labs are awesome, it’s really helpful to be able to use guides like this as a part of your decision making process. If tips like this, the lactate readings, etc. are super helpful!
BDNF: The Little Molecule That Turns Your Brain Into a Supercomputer and Your Body Into a Recovery Machine
Brain-derived neurotrophic factor is one of the most powerful molecules your nervous system produces. People often describe it as “brain fertilizer,” but that analogy only captures a small slice of its real function. BDNF is a master orchestrator of neural plasticity, mitochondrial performance, synapse formation, memory consolidation, resilience to stress, motivation, and even muscle repair. If neurons were plants, BDNF would be the combination of sunlight, water, and growth signals that allow them to sprout new branches, prune old ones, heal damage, and reshape themselves around new experiences. But unlike plants, neurons use this molecule not just to survive, but to adapt to the constantly changing demands of thought, movement, emotion, and metabolic stress. Understanding BDNF means understanding how the brain learns, how it recovers from injury, how muscle and brain communicate, and how lifestyle, stress, peptides, and metabolic signals all converge on the same pathways that determine whether your brain feels alive and adaptable or foggy and rigid. BDNF is a protein belonging to the neurotrophin family, the same evolutionary lineage as NGF, NT-3, and NT-4. These molecules keep neurons alive, guide their development, strengthen synapses, and regulate the plastic changes that allow memories to form. BDNF is produced widely in the brain, especially in the hippocampus, prefrontal cortex, amygdala, motor cortex, and cerebellum. These regions govern memory, emotional regulation, decision making, spatial navigation, threat assessment, learning speed, and movement coordination. BDNF is first made as proBDNF, a precursor that has opposite effects from mature BDNF. ProBDNF generally weakens synapses and promotes pruning, while mature BDNF strengthens synapses and promotes long-term potentiation. A healthy brain needs both the pruning signal to remove inefficient wiring and the growth signal to build new, stronger pathways. When inflammation, chronic stress, sleep loss, metabolic dysfunction, or trauma shift the balance toward excess proBDNF and insufficient mature BDNF, people experience depressive symptoms, reduced motivation, impaired learning, more anxiety, slower reaction times, and cognitive rigidity. When the balance shifts toward higher mature BDNF, people experience more focus, creativity, adaptability, emotional resilience, and capacity for learning new skills or recovering from injury.
0 likes • 20d
@Anthony Castore awesome, appreciate the acknowledgment and confirmation! It’s nice to be in a place that feels supportive and welcoming. Tough to get decent support in places like Reddit and you never know who’s in the other end of the keyboard in terms of actual knowledge or experience. Lots of regurgitation of info from the reel of the day. One of the reasons I’m here is that I appreciate your forward-thinking/open-minded yet safe and conservative approach. I’m admittedly less cautious than I ought to be and will gladly throw the kitchen sink at something if I’m not careful. Having articles that outline how to evaluate your redox state and what to do about it in what order (and others of that sort) are sorely needed in this space. Especially when there are 1000 influencers yelling at their audiences to stack 27 different peptides and to hell with supportive supplements/lifestyle interventions and other substrate support 🤪. Thanks for curating this environment, looking forward to watching it grow!
1 like • 20d
@Anthony Castore @Beverly Haffeman Cosmic Nootropic almost always has it, ships fast every time I order, and it’s always Everpharma even though it’s not explicitly listed as such on their site. This is just my experience but I’ve ordered several times and never had issues. Support is super responsive too. Funny thing though, they don’t have it in their website navigation. You have to search “cosmic nootropic cerebrolysin” and this page will come up - https://cosmicnootropic.com/products/cerebroprotein-hydrolysate/?srsltid=AfmBOoqz58hYCPQseWju9tazOeVx1GzIy81N0sfw8grEbs8I7D_i5i53 Before my TBI I had several amazing psilocybin journeys and also experimented with microdosing for weeks or months at a time (2-5 times per week). These compounds in the mushrooms are profound unlike anything else in the traditional health/biohacking world (the raw fungi matter has other alkaloids etc that seem to contribute to the benefits as compared to isolated psilocybin based on articles I’ve read - I haven’t ever experienced isolated psilocybin by itself). In terms of changing who I am and how I show up on the world for the better, they had a significant impact. During more stressful and high pressure times in my life I tended towards being controlling, having a temper, always being “go go go” and needing to move onto the next thing. I’ve been fortunate enough that I have also had other seasons where free time is abundant and the pace is much slower. That’s when mediation, gratitude, mindfulness seems to be much easier to maintain. But when building a business or two, raising young kids, etc those practices tends to fall into the “nice to have” bucket. I really appreciated that microdosing psilocybin was able to offer a similar benefit during those busy seasons. I could take a 100mg-300mg (every one has their own tolerance and a microdose varies from person to person gravely) and it would chill me out a bit, help me be more present, allow me to appreciate the here and now where I would otherwise be thinking about the future.
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Nick Deck
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@nick-deck-5772
As messy as life can get, I’m very blessed to be living in this body and eager to do it as long as possible with my littles and my lovely by my side.

Active 4m ago
Joined Oct 27, 2025
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