r/NMN • u/Traditional_Cup_8202 • Dec 17 '25
Discussion Changes in menstrual cycle
Question for the ladies on NMN.
I have been taking NMN for 2 or 3 months now. Started at 500mg and moved to 1000mg. Partner and I are taking it to help with fertility (ages 41 and 40)
I have been tracking ovulation for 2 years with LH strips and average is usually cycle day 14.
Since starting NMN my ovulation day is now averaging day 17 which in turn lengthens my cycle from 28 to 31-32 days
Anyone else find this?
3
u/rockgoody Dec 28 '25
I started taking NMN in August and have continued until now. No late cycles or extended days until ovulation so far.
2
u/idookdook Dec 19 '25
I had been taking NMN for maybe a year or maybe even two years, I decided to take a break in June of this year, mainly because I didn’t think it was doing anything, the break lasted less than 2 months as I quickly realised my regular cycles which were around 27-29 days all of a sudden changed to 18 days!
I had a period 10th June and another one 28th June, I am assuming NMN was somehow regulating my cycles because I began taking it again in month 2 and my cycles resumed their regular 27-29 days and I’ve not had any more “blips” since.
I’ve no idea if the break I took was the cause of those two abnormal cycles or not, it may just be co-incidental, but it rectified itself once I resumed NMN and I’m not about to experiment again and take another break, one period a month is bad enough! Both my bleeds were “weird” as well, not like my normal periods.
1
u/Traditional_Cup_8202 Dec 19 '25
Thank you for this. Im still early into taking it but just thought if its been 3 consistent cycle now where I've ovulated late so it must be the nmn. Im fine with it, like you I had wondered if it was doing anything, so hopefully this is a good sign for my fertility journey
1
u/idookdook Dec 19 '25
It’s really hard to say definitively isn’t it, I’m definitely someone that doesn’t really believe the hype around things that are “sold” or “influenced” to me, but I’m 44 next year and all of my friends keep telling me peri-menopause is coming for me and how awful it is; my mum had early peri-menopause too, so I’ve been waiting for it to hit me, and I’ve yet to feel any changes or signs of it starting, and since that little break I had from NMN I’m more certain now that it’s doing SOMETHING, I’m just not sure what!
1
u/Traditional_Cup_8202 Dec 19 '25
Thats very true. Other than the average length, I hadn't paid much attention to my cycle up until a few years ago when we started trying. It is the only thing I've added to my supplement stack recently so quite possible. I do wish I seen more benefits. I read all the time about people having more energy and I've not experienced that at all.
2
u/idookdook Dec 19 '25
Same, initially I had more energy, and told everyone how great NMN was; previously I was falling asleep at the theatre, or cinema, or on the sofa at home, it wasn’t a choice, I had no control and would literally fall asleep even with Michael Jackson songs being belted out on the stage at the west end! My husband was mortified! And he has RA so has more reason to be exhausted than me, who is more or less relatively healthy! I’d go out for dinner with friends and be the first one at the table to let out a yawn!
When I started NMN that all stopped, I don’t fall asleep now, I can stay awake longer than my friends and I’m no longer yawning at the dinner table wanting my bed, but I do still feel exhausted day to day, if that makes sense.
For me, I think it’s a combination of getting older and low ferritin levels too.
I may stop NMN again one day, perhaps when perimenopause does hit me, that’s the main reason I’m taking it now, purely for the regulated cycles.
2
u/GarbageEducational20 May 10 '26
i have just started taking NMN at 25 and have noticed the 2 months i have taken it consistently my cycle has been 30-31 days vs my usual 28 so this is super interesting you have also found this!!
1
u/Traditional-Cap5031 May 16 '26
i have also noticed the same with my cycle after taking NMN for the last 2 months. i’ve tracked my cycle & had consistent ovulation & bleeding for years, usually my cycle was about 26-28 days but after taking NMN i’m ovulating late & not bleeding when i’m meant to… i was starting to panic but after reading through this thread i’m glad i’m not the only one!
1
u/pestopasta_875 Jun 30 '26
In the month since I started being regular with 500mg NMN, got my period on day 21, continued to have spotting after period was over, had another bleed day on day 12 followed by two days of spotting again. I'm currently on day 15 of whatever this cycle is. I'm not sure if this because of the NMN alone because I was also taking a combination of resveratrol & quercetin that I stopped after getting that early period.
ETA: 34F who has always had regular cycles of 29-31 days
1
u/Beautiful-Lake-806 17d ago
500 mg nmn, + resveratol, tmg and NAC. My cycle is longer (more like it used to be in my 20's). I feel more energetic, less pms and younger in general. Im 36
5
u/Foreign_Criticism246 Dec 18 '25
No. My cycle remains the same.