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40 contributions to Castore: Built to Adapt
KPV
hi! What are the beyond use days for peptides?is there a general rule? I am a hyper responder so I pin very low doses. thank you
2 likes • Jul 16
About 6 mo ago, Chris Boffin (??) another skool channel and someone else mixed up KLOW and also the other question, does mixing peptides cause degradation. They mixed 2 peptides (??) and let sit out at room temp. At least we store in the fridge. After 30 days at room temp, the peptides they tested with only degraded 1-2%. KPV was in the KLOW. The bottom line is keep in the fridge and use for along time. IF traveling don't worry about room temp. Good luck, curt
The Biometric Blackout Challenge
The Biometric Blackout: A 30-Day Challenge I wear a tracker. And if I am honest, I obsess over the numbers. A conversation yesterday, and some reflection after it, left me with a question I cannot shake: what if the number on my wrist is not helping me move forward? What if, some days, it is the thing holding me back? I am not asking this rhetorically. I am genuinely questioning it. So I want to test it, and I want you to test it with me. What would have to be true For any metric on your wrist to earn its place, three things have to hold up. One: you understand what the number actually means. Two: it is measured accurately and consistently, day to day, on your body. Three: its interpretation tracks real progress. Not just what the app says, but what you can objectively measure and what you honestly feel and perform. If even one of those links is weak, the number stops being neutral information. It can quietly become a governor on your effort. You wake up, see a low recovery score, and talk yourself into a smaller session than your body was ready for. The device did not measure your ceiling that day. It set it. That is the possibility I want to put under a microscope. The challenge For five days, go blind. Wear the device if you like, but do not look at the data. Each morning, before you get out of bed, take your own resting heart rate by hand. Same time, same conditions, sixty seconds, before coffee or before your feet hit the floor. Write it down. Then, through the day, journal a few simple markers and rate each one from 1 to 5: 1. How good was your workout 2. How was your energy during the day 3. How tired did you feel 4. How refreshed did you feel when you woke up That is it. A number you took yourself, and four honest scores. Five days. The reveal On day six, pull up your device data and lay it next to your notes. Where did they agree? More importantly, where did they not? Find the days the device said you were cooked and you actually felt great and trained well. Find the days it said you were recovered and you were flat.
0 likes • Jul 4
It's another phenomenon and that's results obsessing with biometric trackers. Raising anxiety and obsession focus. Net net lowering health and feeling of well-being. Just reporting what I've heard. So Alex there's additional issues with wearables than just accuracy and actionability. To me the necessary quality of a wearable is it doesn't need to be protect particularly accurate but does need to be precise. Precision means it's faithfully follows the metric but doesn't have to be accurate. I either shape of the curve. Continuous glucose monitors are famous for being not particularly accurate but precise. All the rings and wrist devices measure HRV on a different scale and can't be compared because they aren't accurate but they report to be precise. I haven't bought any wearable is I don't understand there to be short leash action abilities to move the HRV or resting heart rate. I suspect I'm wrong but I would need more information on how HRV and in my case resting heart rate can be moved significantly in the right direction based on some protocol I'm not aware of. Tbd... A firtle area no doubt, curt
SGLT2 and Trehalose
Hello everyone! There’s been much talk about SGLT2 inhibitors and its benefits in terms of longevity and overall optimization. I’m really interested in trying it. Has anyone tried it and what are your experiences? My concern in my situation is that I don’t eat a lot of carbs and my fasting insulin is already low, below 3. Wouldn’t that give me the risk of having eu glycemic keto acidosis? Any insights? About Trehalose, I read Anthony recommending taking it fasted for autophagy. Great. However, taking it fasted wouldn’t it break the fast since it’s an actual sugar? And for the autophagy activating benefits what dose should be taken at once?
0 likes • Jun 14
@Diva Osorio , I'm 72yo healthy male, focusing on anti aging, rapamycin and much more. I wore a CGM for 30 days for a base line. Choppy if no cheets never going above 120, but hovering around 100 and never going below 80-90 at night. IMHO this is about 20pts too high an when a bolice of carbs would spike to 150. BUT come down quickly. In a sick SAD eating US, a endo MD would call me a model body. IMHO not good enough. Yet heating 100% carnivor and only a low carb cheese cake or dark chocolate for desert. THEN I wore a CGM while adding: 10mg dapaflogzin (??) one of the 3-4 SGLT-2. More common is: Canaflozen (??) and Empagflozen(??). I chose Dapa for lower side effects per my searching. I could be wrong given other anti agers chose Cana. I also added 1000mg imeglimin, a newer very low toxisity, WIDE range of benefits and my glucose flattened to never going above 100 duriing the day and hovering around 90. Night now down between 70 and 80, and I lost the dawn effect that for me could spike at 8am to 120. Now flat rising to 100 and even then dropping into mid day. Some say less is more. Maybe true. But these 2 drugs have zero side effects that I see and the glucose thus insulin flattening to me is worth it. I buy off alldaychemist dot com. Good luck, curt
0 likes • Jun 14
Some say one needs elevated insulin to gain muscle and rapamycin thwarts muscle gain as well. For me both are not true. With high a high protein diet, 100gr++ at 168#, and use of a kaatsu.com C4 plus hand weights, vibration plate, other minor excersizing have gone from 175 to 168 adding nicely buldgine arm and leg muscle. I also do HGH secretagogs, IPA+CJC+tesa 300mcg ea 7am and IPA+CJC at bed. Other things like SLU+5Amino. All low toxisity, wider benefits to composition and health (IMHO). Get your blood tested at leat 3x a year. https://dirtcheaplabs.com/alacarte?panel=dirt-cheap&lab=quest curt
Start Here: Why This Place Exists
I went back and forth on whether to write this for a long time. Part of me never wanted this community to become another place that just sells access. There are already enough of those. When I started this group it was really just an extension of the conversations I was having anyway. Interesting papers. Questions I couldn’t stop thinking about. Mechanisms that seemed important but weren’t getting much attention. Things I was learning from my own training, my own health, and the people I have the privilege of working with. Somewhere along the way it grew into something much bigger than I expected. That part is exciting. But it also created a problem. A lot of the conversations I actually want to have don’t fit into a social media post. They don’t fit into a reel. And they definitely don’t fit into a comment section. Some topics need an hour. Some need ten. Because understanding something and hearing about something are not the same thing. Most people today know more than they ever have. And yet somehow they are more confused than ever. They have collected protocols, saved posts, screenshots, stacks, peptides, supplements. But if you changed one variable tomorrow, they wouldn’t know what to do next. That is not a criticism. I have been there myself. The deeper I get into this field, the more convinced I become that understanding is the real asset. Not information. Information is cheap now. Understanding is rare. So that is what this place is built around. Not protocols. Not secret compounds. Not some exclusive club. A classroom. We take a topic that matters and pull it apart, piece by piece, until it actually makes sense. We talk about the things everyone is excited about, and the things nobody is paying attention to yet. We bring in smart people who challenge the way I think. We do live Q&As. And I spend real time showing not just what I am doing, but how I am thinking through decisions as they happen. Because that is the skill that transfers. That is the thing that stays useful when the next study comes out and changes the conversation.
2 likes • Jun 4
@Anthony Castore Hi Anthony, some skool leaders record vimeo (private) videos and post with only some written word. Change is good, thinking about the future is good.. Take care, curt
Your Dog’s Joint Pain Might Not Be a “Joint Problem” at All
There’s a really interesting shift happening in veterinary medicine right now and most pet owners probably haven’t noticed it yet. For years, canine osteoarthritis care was largely framed around symptom suppression. Dog slows down. Dog limps. Dog struggles getting onto the couch or into the car. Maybe there’s stiffness after rest. The solution pathway usually looked pretty predictable. Anti-inflammatory medications. Weight loss recommendations. Joint supplements. Maybe laser therapy or rehab if someone was lucky enough to have access to a good clinic. Now there’s this growing tension emerging in the field between symptom management and regenerative signaling.That distinction matters. Biology does not really think in terms of pain versus no pain. Biology thinks in terms of stress, tissue integrity, signaling environment, energy availability, immune coordination, and mechanical loading. Pain is just one output of a much larger conversation. And once you start viewing osteoarthritis through that lens, a lot of things begin to make more sense. Take a dog with chronic joint degeneration. Most people imagine the cartilage as something that simply “wore out” like old tires. That analogy is incomplete. Tissues are alive. Cartilage is metabolically active. The synovial lining is active. Bone underneath the joint is active. Immune cells are active. Nerves are active. Mitochondria inside all of those tissues are constantly sensing stress and responding to the environment around them. The joint is less like a dead hinge and more like a neighborhood under chronic construction.Now think about what happens when the construction crew never gets coordinated instructions. Inflammation rises, but repair signaling is weak. Mechanical loading becomes abnormal because the dog moves differently to avoid discomfort. Muscle mass starts dropping because movement decreases. Mitochondrial energy production inside local tissues becomes less efficient. Oxidative stress rises. Synovial fluid quality changes. The immune system starts maintaining a low-grade inflammatory environment instead of resolving it.
3 likes • May 21
Tnx Anthony, so much to say re poor pet / dog health!!!!! Very sad. Several Vet sources antidotally say 33% of dogs die of cancer. If this where humans,, which are not far behind and increasing, it'd be an emergency. Old timers feeding dogs their ancestral diet, raw animal parts and organs, claim their dogs live past 20yo and thats normal and they worked the herd/flock into their last months. Dogs are having their spleens removed... Have diabetes, going blind, getting sever cateracts, which I would call dog type 2, food induced. Commercial dog foods especially dry is too high carb and making dogs sick and shortening their lives (my opinion). Since annual blood testing is not common the diabetes, cancer, organ failure, shortened life, joints who's cartilage dissolves out from high blood glucose/insulin,,,, etc,,, goes undetected. Like in humans, my opinion is that dogs who get shot hips, cancer etc are running way too high glucose and insulin etc and are on a faster path to end of life. Sad its mainly a poor diet and added to a sedentary life causing the dogs body to degenerate. (like humans..) We had a neighbor with a brown lab 15 yro with sore hips, limping, couldn't get on the couch. We took to feeding their dog raw egg yokes, cod liver oil, liver pate. That dog would get loose and bang is nose on our front door to get at my wifes nursing. In a month that dog was jumping on the couch and running like it had years earlier. Did our neighbors continue the diet upgrade? Nope... The BARF diet, AKA raw diet, is what enlightened pet owners feed their dogs. Cod liver oil, raw eggs et al would be a great addition. Not because of a fad, or a trial, rather from a 20 yr experiements with various ratios of vegetables to meat, meat sources, we've since 2025 arrived at 100% regeneratively grown grass finished beef and lamb. Slight cooking in our food prep vs a dog's BARF/raw diet. We are better off for it. Loosing weight gaining muscle. Now free of aches and pains from the anti-nurtrients (for us) in vegetables. Only occationally low/no oxalate veges like asparagus and broccoli.
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Curtis Smith
3
22 points to level up
@curtis-smith-7832
72yro male, 164#, 5'10", 31" waist, healthy, active, poly-nutricals, rapamycin 4yr, SGLT-2 etc, anti-aging / health span interests. Atlanta Georgia.

Active 5h ago
Joined Dec 26, 2025
Atlanta, Georgia, USA
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