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GlyNAC trial in older adults, glutathione restoration looks legit but questions remain

Posted by sleep_coastal in Research & News - 4 points, 7 comments.

Been following the GlyNAC work coming out of Baylor and honestly it is one of the more compelling aging-intervention studies I have seen in a while. The gist is they gave older adults glycine plus NAC at roughly 100 mg/kg each daily and measured glutathione deficiency, mitochondrial function, oxidative stress, inflammation, insulin resistance, even cognition and strength. Pretty much everything improved toward younger levels.

You can check the profile here /peptides/glynac. What I like is they actually measured glutathione before and after instead of just assuming. Too many aging studies hand-wave the mechanism.

Anecdotally I tried GlyNAC for about two months last winter and my sleep quality seemed better, less brain fog in the afternoons, could just be placebo though. The sulfur smell from NAC is brutal, I will say that much. What I am skeptical about is whether this scales to people who are already fairly healthy and younger.

The trial population was older adults with documented glutathione deficiency. If your glutathione is already fine, are you just making expensive urine? Also the dosing is a LOT of powder.

Anyone here with longer-term experience, did you notice anything past the first month or did it plateau? Curious what people think about cycling it versus daily.

Comments

  • student748: For what it is worth i tried glycine plus NAC separately for about 3 months, not the combined GlyNAC thing. Just stacked them myself at roughly the same 100mg/kg each. Felt like recovery between long runs improved a bit, less heavy-legged the day after big efforts, but honestly could've been anything else going on at the time. The thing that bugs me is the same question you're raising. How do you even know if your glutathione is deficient without testing? Is that something people actually get m
  • dana_n: Anecdotally ive wondered the same thing about glutathione testing. Most standard panels dont include it. You can get whole-blood glutathione through some specialty labs but its not cheap and interpretation isnt straightforward since levels fluctuate quite a bit throughout the day. The Baylor group used a pretty specific assay setup that most of us wont have access to lah. So yeah, mostly guessing unless youre willing to pay for specialised testing.
  • rational_experiment: I’ve done the same separate glycine and NAC stack for a couple months and noticed slightly less soreness after heavy yoga sessions, but I also wonder if it’s just placebo. I’ve never had my glutathione measured; most clinics don’t run it routinely. Do you know any accessible ways to test it?
  • sleep_coastal: The less soreness after yoga lines up with what the trial showed for physical function measures, so that is a good sign it is not just placebo for you. On testing, I had the same problem. Most standard panels do not include it. There are direct-to-consumer options that measure whole-blood glutathione through a dried blood spot, but I have not used one myself so I cannot vouch for accuracy. Anecdotally I just tracked how I felt and called it good enough.
  • sleep_coastal: Yeah that is exactly the wall I hit. I looked into whole-blood glutathione panels last winter when I was running it and the couple of labs I found were gonna run me like $200-plus and even then I wasnt confident Id interpret the number correctly without a baseline. The Baylor assay setup is not something your standard functional med doc is ordering. So I just went by feel, which is basically what you are saying, mostly guessing. Did you ever pull the trigger on any specialty panel or did you ba
  • sleep_coastal: The heavy-legs thing is interesting, anecdotally my afternoons felt clearer but I never tracked anything physical like you did with the runs. On testing, you can get whole-blood glutathione through some labs but it is not cheap and most docs won't order it. Red blood cell glutathione is another option. I just guessed and hoped, honestly. Would love to hear if anyone here actually pulled labs before and after.
  • raj_j: Honestly the dried blood spot thing is tempting but I keep wonderin how stable glutathione even is on a card mailed back to a lab. Seems like it could degrade pretty quick. I just went the same route y'all did, tracked how I felt. For me the biggest tell was mornin stiffness, took about three weeks to notice it ease up. Could be other stuff too though, hard to say it was just the GlyNAC.

Community discussion - research and educational context only. Not medical advice.