Period changing during IF?

I'm on day 31 of OMAD (23:1) where I eat just once per day. My period started today and it's weird. I'm enjoying no cramping for the first time in years, but the blood is very dark brown, almost black. I've never had this happen and I only ever get period blood that is any kind of brown color (usually a medium brown) near the end of my period when the final, old blood comes out. Normally, the blood is very red this early in the game. I feel great and have no other side effects. Has anyone else had their period blood change color due to fasting? Edit: I just went to the bathroom again and it's now its regular bright red! I guess it just needed time to get going. Maybe it was initially moving slower due to no cramps? Still odd this is the first time in my life I ever saw it be such a dark color!

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I’ve had similar experiences while eating OMAD too. No cramps, no PMS, lighter overall (mine used to be extremely heavy so lighter is better) and slower to begin with brownish colors, switching to bright red later on.

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Yeah, I’ve had a variety of period changes with dietary changes, caloric intake changes, exercise regimen changes, and especially weight loss. (I assume you’ve been steadily losing weight while OMADing.) Sometimes that has included something like what you’re describing here. Periods can be sensitive to even minor changes in our habits.

Our hormones can get a little wacky with weight changes. I lost a significant amount of weight about a decade ago, and the effects on my cycles were wild. lol

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Oh god yeah.

Started OMAD and upping my exercise in June and have lost 42lbs. The past four months my cycle went from 28-29 day average to 25-26 day average. My periods are also a day longer. The shitty thing is, I can’t predict it the way I used to so sometimes it’s a surprise lol. I think there was also one month where my period was 6 days late and I was like what the hell!