LabRatLouis

veteran · Boston, MA

Molecular biology PhD, industry side. I read the actual papers so I can tell you when the rat study is being sold to you as a human result.

Joined May 2026 · 80 posts

Preclinical is not a promise.

Recent posts

• Does injecting NAD+ make sense if it just breaks down to NMN/NR/NAM anyway

  Genuine mechanistic question, not trying to start a fight. NAD+ is a big charged molecule, it doesn't cross the plasma membrane intact in any meaningful amount. Whether you push it IV or sub-q, the working model is that it gets broken down extracellularly into NAM (and some NR) by CD38 and other ectoenzymes before cells can actually take up the pieces and resynthesize NAD+ inside. NMN and NR are already those breakdown products, and both have oral bioavailability data in humans, NR especially has decent pharmacokinetic work behind it. So what is the actual argument for paying a premium for the precursor's precursor and infusing it, versus just taking NR or NMN orally and letting the salvage pathway do the same job for less money and less hassle. Not saying NAD+ IV doesn't make people feel something acutely, I just don't see the biochemical case that the intact molecule route gets you anywhere oral precursors don't.

  5d ago

• Throbbing pain the day after GHK-Cu injections, no redness or swelling

  Copper peptide solutions skew acidic once reconstituted and GHK-Cu specifically has a reputation for being harder on tissue than something like BPC alone, even at low volumes. What you're describing sounds like a delayed local inflammatory response, not an allergic one, which is why you get nothing in the first hours and then the complement cascade and local immune response ramp up overnight. Combining it with another peptide in the same syringe can also push the pH further off from what your subq tissue likes. I'd try splitting the two compounds into separate pins at separate sites before assuming it's just GHK-Cu being GHK-Cu.

  5d ago

• Does BPC-157 or TB-500 need to go right at the injury site to work

  Short half life is the argument people make for local injection, get it there before it clears. Whether that matters clinically in a human versus a rat with a surgically created lesion is a different question nobody's answered.

  5d ago

• Stacking MOTS-C, NAD+ and other mitochondrial peptides during a rehab block

  SS-31 human data is still thin, mostly early phase stuff for heart and kidney conditions, nothing on tendons.

  6d ago

• Stacking MOTS-C, NAD+ and other mitochondrial peptides during a rehab block

  MOTS-C is a mitochondrial derived peptide, the mouse data shows AMPK activation and better insulin sensitivity, that part's solid in rodents. SS-31 binds cardiolipin and stabilizes the inner mitochondrial membrane, mostly studied in ischemia reperfusion models, not tendon recovery. NAD+ IV stuff is mostly subjective energy reports plus some small human trials in other contexts. None of that tells you your tendon heals faster, it tells you cellular energy production might be better supported while you're loading it.

  6d ago

• Bicep tendinopathy 4 years in, nothing working, thinking hgh or trt next

  HGH for tendon repair is mostly animal data and in vitro fibroblast work, the IGF-1 pathway story is real but the human tendon response has been inconsistent in what's actually been studied. Doesn't mean it won't help you, just don't expect it to behave like TB-500 does.

  8d ago

• Scar healing peptides before a mole excision with a pending biopsy

  Not overthinking it. GHK-Cu's whole mechanism is stimulating new blood vessel growth and collagen remodeling, that's great for a clean scar but it's exactly the pathway you don't want revved up around a lesion that hasn't been cleared yet. I'd shelve the copper peptide until you have a pathology result back, not after.

  9d ago

• BPC-157 or TB-500 for a severe calf strain before a tournament

  TB-500 gets cited for actin binding and cell migration, that part's real in vitro. The rodent wound studies showing fast muscle repair don't map cleanly onto a grade 2 human calf tear on a human timeline. People read those studies and assume days, not weeks.

  9d ago

• First US injectable BPC-157 RCT, anyone got details

  Phase 1 with enrollment inconsistencies and no start date yet is about as early stage as it gets. Worth tracking but I wouldn't hold your breath for this one to read out fast, 2027 start plus 5 month followup plus analysis puts real results years out even if everything goes smoothly.

  10d ago

• BPC-157 / TB-500 after labral repair, worth starting early?

  The labral tissue is fibrocartilage, not tendon, so the healing biology is a different animal than what BPC-157 gets studied for. Doesn't mean it can't help the surrounding capsule and soft tissue, but be careful assuming the same mechanism applies to the labrum itself.

  18d ago

• Does pushing bpc/tb dosage higher actually speed healing or is there a point where more isn't better

  Nobody has actually mapped a dose response curve for BPC in humans so anyone telling you 3000mcg is optimal is guessing same as you are. Most of these peptides probably work through receptor mediated pathways, and receptors saturate. Past a certain occupancy more ligand doesn't do anything except circulate and get cleared. The rat studies people cite for BPC scale doses by body weight in ways that don't translate cleanly to a flat human mcg number anyway, so the 3x guy isn't following any real logic, he's just extrapolating from vibes with extra zeros.

  18d ago

• Back instability after starting ghk-cu, no pain though

  Copper peptide ramps up lysyl oxidase activity pretty fast, that's the enzyme that cross links collagen. If you've got old scar tissue back there from the surgery, a sudden uptick in remodeling signal could make it feel different for a week or two while things reorganize. Doesn't mean damage, just means the tissue notices. I'd watch it, not panic over it.

  19d ago

• Splitting tesamorelin/ipamorelin into AM and PM instead of one bedtime shot

  The whole appeal of GHRH analogs is that they amplify your existing pulses rather than creating a flat GH level. Splitting the dose smooths things out, sure, but you might be trading pulse amplitude for frequency, and the IGF-1 response that actually drives tissue repair is tied to those bigger spikes, not a steady trickle. There's also the receptor desensitization angle with repeated dosing close together. I haven't seen anything showing a split protocol outperforms a single nighttime dose for recovery markers, it mostly reads like a convenience thing people are rationalizing after the fact.

  23d ago

• Dosage and timeline for BPC-157 and TB-500 on an LCL sprain

  TB-500's human ligament data is thin, most of what you're hearing is rat tendon work plus anecdote.

  24d ago

• Insomnia and early waking after starting bpc-157/tb-500 post hip surgery

  Worth separating two things here, the vivid dreams night one and the 1 to 3am wakeups are probably not the same mechanism. The dream thing is common with a lot of new compounds and usually fades fast. The early waking pattern sounds more like a cortisol or sympathetic tone issue, which can absolutely happen with a morning dose if it's giving you a second wind you're not used to.

  24d ago