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Castore: Built to Adapt

815 members • Free

Peptide Researchers

6.4k members • Free

7 contributions to Castore: Built to Adapt
peptide source
I’m wondering where everyone gets their injectible peptides from? Anthony, does SSRP have a preferred source that us in the community could purchase from? Any online clinic where a virtual consult could be done and the peptides prescribed from a compounding pharmacy and shipped to our residence? I have a functional medicine doctor in miami but he requires you pick them up and they are already reconstituted which affects their expiration.
0 likes • Jan 8
https://signumscientific.com/account/login
Mitochondria
I am going to be starting a mitochondrial stack starting with SS 31 then Mots-c than 5amino1MQ 6weeks with all 3 Has anyone done something similar? Any suggestions on how I should run it?
4 likes • Jan 7
In my experience ( I’m old and fat) 5 amino needs to be dosed very high to get noticeable results. PLEASE REMEMBER, I started the comment with in my experience.
Fat Loss Decoded — Part 2: Inside the Mitochondria (Where Fat Is Actually Burned)
In Part 1, we covered how fat gets released from storage and transported into the mitochondria. But none of that matters if the mitochondria can’t process it efficiently. Fat loss doesn’t happen in your bloodstream. It happens inside the mitochondria tiny power plants in your cells that turn fuel into energy. Once fatty acids are delivered, they enter a multi-step process that converts them into ATP. This is where the real “burning” of fat happens. It’s called beta-oxidation and it’s tightly controlled by mitochondrial structure, function, and demand. Once inside the mitochondria, fatty acids are broken down into acetyl-CoA units through beta-oxidation. These units then enter the Krebs cycle, producing electrons that are shuttled through the electron transport chain (ETC). The final product is ATP...our cellular energy. But this entire chain only runs efficiently when the mitochondria are healthy, active, and responsive to your body’s energy needs. This is where mitochondrial dynamics come into play. Your mitochondria aren’t static they’re constantly undergoing fusion (joining together) and fission (splitting apart) to adapt to energy demand, remove damaged parts, and increase their functional capacity. Fusion supports energy efficiency by creating large, interconnected networks that can share components and optimize ATP production. Fission allows damaged mitochondria to be isolated and removed through mitophagy a quality control process. If this balance is off, you lose energy efficiency, generate more oxidative stress, and impair fat oxidation. You also need strong membrane potential the electrochemical gradient across the inner mitochondrial membrane. This gradient is what drives ATP synthesis. If membrane potential is low, the mitochondria struggle to process fatty acids, and beta-oxidation slows down. If it’s too high and uncoupling doesn’t occur, oxidative stress can build. Now, let's talk about how to support this phase, oxidizing fat inside the mitochondria through targeted interventions that improve mitochondrial efficiency, quality, and turnover. We have several tools, SLU-PP-332 is a powerful compound that acts as an agonist of ERRα (Estrogen-Related Receptor Alpha), a nuclear receptor that regulates genes involved in oxidative metabolism, mitochondrial biogenesis, and fatty acid oxidation. SLU increases the transcription of proteins responsible for beta-oxidation and oxidative phosphorylation, making the mitochondria more efficient and flexible in using fat as fuel. It also synergizes with AMPK and PGC-1α signaling, reinforcing the adaptation to fat as a primary fuel source. Urolithin A enhances mitophagy, the recycling of dysfunctional mitochondria. As you push your metabolism with fasting, training, or caloric deficits, mitochondrial stress increases. Urolithin A clears out damaged mitochondria and promotes the growth of newer, more efficient ones. This keeps the beta-oxidation machinery clean and fully operational, especially during extended fat loss phases.
1 like • Aug '25
@Anthony Castore SUPER NICE write up! Thank you
Fat Loss Decoded: Part 3
How Your Body Chooses Fuel (And How to Tilt the Odds Toward Fat) By now, you’ve mobilized fat from storage (Part 1) and learned how to support the mitochondria so they can burn it efficiently (Part 2). But here’s the question that matters most: How does your body decide whether to burn fat or sugar? The answer isn’t random—it’s governed by tightly regulated signaling systems. And if you understand how they work, you can bias your metabolism toward fat oxidation without starving yourself or overtraining. At any given time, your body can use glucose, fatty acids, or ketones for fuel. Protein can be used too, but that's not ideal unless you’re undernourished or extremely glycogen-depleted. The fuel you burn depends on your internal environment mainly energy status, hormone levels, and cellular signaling. The primary switch that tilts metabolism toward fat burning is AMPK (AMP-activated protein kinase). AMPK is activated when energy is low like during fasting, exercise, or calorie deficits. It tells the cell: “We’re short on energy. Start breaking down fat, stop building things, and prioritize survival.” When AMPK is activated, several things happen: - It increases fatty acid uptake and oxidation - It downregulates mTOR (the growth/building pathway) - It enhances mitochondrial biogenesis and function - It inhibits anabolic processes like fat storage and protein synthesis This is the environment where fat is preferred over sugar as a fuel source. On the flip side, mTOR (mechanistic Target of Rapamycin) is a nutrient-sensing signal that turns on when energy and nutrients especially amino acids and insulin are abundant. It tells the body: “We’re good on energy. Let’s build, grow, and repair.” That’s great for hypertrophy or recovery but it shuts down fat oxidation. mTOR and AMPK work in opposition. You can't fully activate both at once. This is why timing matters. If you activate mTOR right after waking up with a large carb-heavy meal, you blunt the AMPK-driven fat-burning window you had from fasting overnight. But if you train fasted or push your first meal later (and keep it moderate in carbs), you extend the AMPK window and shift fuel use toward fat.
2 likes • Aug '25
Another great piece Anthony, thank you! Huge help in building BF cycles, love the short breakdowns on the what’s and their pathways of mechanical action.
Fat Loss Decoded — Part 1: Mobilization and Transport (The Most Overlooked Step)
https://www.instagram.com/p/DM21Ta2PFWv/?utm_source=ig_web_copy_link Fat loss doesn’t start with cardio. Or fasting. Or even a calorie defecit it starts with a signal. That signal tells your body, “We need fuel. Tap into the reserves.”But unlocking stored fat is only half the story. The real challenge is getting that fat where it needs to go so it can actually be burned. Let’s break it down clearly: before fat can be used as energy, it has to go through two critical steps lipolysis and transport. Without both, there is no true fat loss. Fat is stored in your adipose tissue as triglycerides three fatty acids bound to a glycerol backbone. These are compact, stable, and metabolically inert. To use them for fuel, the body first breaks them apart. This is called lipolysis. Lipolysis is triggered when insulin is low and counter-regulatory hormones like adrenaline, cortisol, and growth hormone rise. Exercise, fasting, cold exposure, and stimulants can all push this button. The result: free fatty acids and glycerol are released into the bloodstream. But—and this is crucial—those fatty acids aren’t automatically burned.They’re just mobilized. Now they’re floating around, waiting to be used… or re-stored. If the next step transport doesn’t happen efficiently, those fatty acids never make it to the mitochondria. They get recycled, turned back into fat, or contribute to inflammation To reach the mitochondria, long-chain fatty acids require a shuttle system.That shuttle is carnitine. Carnitine binds to fatty acids and helps escort them across the inner mitochondrial membrane. This process is called the carnitine shuttle, and it’s the rate-limiting step in fat oxidation. If this system is underpowered, you’ll struggle to lose fat no matter how “in a deficit” you are. There are different forms of carnitine, each with unique properties. L-carnitine tartrate is used in performance and recovery settings. Acetyl-L-carnitine (ALCAR) crosses the blood-brain barrier and supports both mental energy and mitochondrial function. Carnitine fumarate adds cardiovascular support and works well in metabolic dysfunction. Injectable carnitine bypasses gut absorption issues and results in higher blood and tissue concentrations, making it especially effective when timed around fasted cardio or training.
1 like • Aug '25
Thank you, VERY helpful lesson on the process!
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Jason Luce
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5points to level up
@jason-luce-8253
Husband and Father of two amazing people

Active 55d ago
Joined Aug 1, 2025
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