NAC (N-Acetyl L-Cysteine) improved my sleep! |1 day Update


This post is basically the prelude to my upcoming comprehensive post about the various health benefits of a supplement called N-acetyl L-cysteine (or NAC for short). NAC is a derivative or altered version of the amino acid cysteine. Cysteine is a sulfur-containing amino acid that is essential for protein structure and also the formation of the body’s “master antioxidant” glutathione.

Glutathione is considered the master of all antioxidants in the body and is extremely efficient at counteracting the damaging effects of free-radicals such as various reactive oxygen species (ROS) in cells. This antioxidant is composed of the the amino acids cysteine, glycine and glutamate. The latter two tend to be abundant in our bodies, but cysteine… not so much. This is why NAC is so effective at raising glutathione levels in the body.


I started taking this supplement yesterday for reasons I will fully explain in a future and more comprehensive NAC update/review. I took one 600mg tablet at lunch and again at dinner for a total of 1200 mg for the day. I will reveal the brand I use in a future update once I build confidence in the brand.

I’ve read that NAC has to build up in the body to initiate any substantial effect, and some don’t feel anything for more than a week. I, on the other hand, felt the effects of this amino acid just a few hours after the first tablet… and I don’t think it was placebo. I am not sure whether this is common or not, but about 3 hours after taking my first tablet, I felt unusually sleepy and decided to take a 36 minute nap… weird number, I know. I woke up from that nap literally 15 seconds before the alarm went off, and I felt more more refreshed than I usually do after taking naps.

A few hours after taking the second tablet, I went to sleep for the night and had the most amazing sleep I have had in months. I am not kidding! At all! My dreams were so vivid and non-draining (very vivid dreams usually drain me of energy). I felt light throughout my sleep and when I woke up. Even as I type, I still feel lighter than usual. I am quite sure these are the effects of enhanced glutathione production as a result of the NAC I took.

Other effects:

The only other effect NAC had on me so far was a mood improvement. I am not someone who feels down a lot, at least not anymore (I’ll explain in a later post), but I have noticed myself laughing and smiling more often and genuinely than I already do.

Stay Tuned:

I have to admit, I have tried NAC 2 years ago, but only for a few days. The effects, from what I remember, are similar to what I feel now.

I will try to commit to this supplement more long term as a personal health experiment. I will also be updating you periodically on how I feel about the product. So, follow me and comment/like if you are interested.

In my opinion NAC — more so the science behind NAC — has the potential to truly change health and longevity as we know it. That sounds dramatic, especially since this supplement has been on the market for decades; but the more we look into the long-term effects of NAC, perhaps the more astonished we’ll be. I’ll be a guinea pig for that!

6 thoughts on “NAC (N-Acetyl L-Cysteine) improved my sleep! |1 day Update

  1. There is a supplement made by a company that I use that has “L-cysteine HCI” in its “proprietary blend”. I’m assuming that is the naturally occurring form of NAC? Would this have the same results?

    Liked by 1 person

    1. I also thought a similar question, but didn’t really find any in-depth comparisons of the two. I highly doubt they would have the same results when it comes to glutathione production though, because although L-cysteine is the naturally occurring version, it’s not as readily absorbed into the bloodstream as NAC when ingested. This goes for L-cysteine HCl as well, even though it’s more readily absorbed than pure L-cysteine. NAC is acetylated for the purpose of more efficient absorption.

      Also, pure L-cysteine when ingested can become oxidized to cystine (when not also taking adequate vitamin C), and this can lead to cystine kidney stones. Not enough research has been done on this, but I believe oxidation would be less observed with NAC because of the stabilizing properties of the acetyl group; so in this way NAC also makes L-cysteine more available to the liver for glutathione production. But I’d have to dig into it more.

      This is a really good question, and I’d love to write a post fully comparing L-cysteine, L-cysteine HCl and NAC when I do some more research. 🙂


  2. This is a highly effective visualization technique for sleep. I’m knocked out before I can make it up past the knees:

    “Again, lie down as comfortably as possible and take three or four deep, breaths and keep you eyes closed. Then envision that there is a hole in the bottom of each foot. In your mind see the tension in your feet draining out through the hole. Then go upward to the lower legs, thighs, butt, abdomen, hands and lower arms, chest, upper arms, shoulders and back, neck, face and head. Should you feel tension coming back, ignore it and finish the drain completely. Then, if need be, do it again.

    If you do this on a daily basis for 15 to 30 minutes, in a very short period of time you will notice a steady flow of powerful currents passing through your body at the end of each session. You will also learn and recognize that your physical tensions amassed throughout the day are easily alleviated.”
    – Hesh Goldstein

    Liked by 2 people

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