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Is it bad to just eat one gigantic meal in a day?

Posted on 12/30/24 at 8:20 am
Posted by WG_Dawg
Member since Jun 2004
90335 posts
Posted on 12/30/24 at 8:20 am
Little backstory. I don't eat breakfast which started a couple years ago from an intermittent fasting experiment. I kinda liked it so that eventually just morphed into "I guess I don't eat breakfast now". Typically i'll eat lunch around 11am and dinner around 5:30.

Lately due to work functions or holidays or other things beyond my immediate control, a couple times in the last month I've eaten lunch later around 12:30 or 1. Because of this I'm so hungry I'm about to pass out so I gorge myself and eat a frickton. As a result I'm still full late and don't eat dinner.

Which brings me back to question in the OP...is it "bad" on your body to do things that way? A quick google search just turned up results on people trying to lose weight which doesn't concern me, I'm more so asking about the effects on the internal works of the body itself.

To put it even more simply....if you consume X amount of calories/carbs/proteins/fats/etc in a given day, does it make any difference to your body if you take in all X-amount in one sitting in the middle of the day compared to taking half of the total midday and the other half evening?
Posted by lsu777
Lake Charles
Member since Jan 2004
38079 posts
Posted on 12/30/24 at 8:24 am to
no, its not ideal but not bad
Posted by lsugerberbaby
baton rouge
Member since Mar 2008
3067 posts
Posted on 12/30/24 at 8:50 am to
I guess when you think about it, our ancestors likely didn't eat multiple times throughout the day. They probably ate a meal once every few days. Your body can fuel itself for a very long time on fats.

I know a few people that do it, and eat around 5:00. I guess it allows your body to go into ketosis and apparently boosts your testosterone after about 16 hours of fasting.

I honestly don't know much about it...only from what I've heard from those who do it.

Posted by TU Rob
Birmingham
Member since Nov 2008
13478 posts
Posted on 12/30/24 at 9:06 am to
quote:

I guess when you think about it, our ancestors likely didn't eat multiple times throughout the day. They probably ate a meal once every few days. Your body can fuel itself for a very long time on fats.

I know a few people that do it, and eat around 5:00. I guess it allows your body to go into ketosis and apparently boosts your testosterone after about 16 hours of fasting.

I honestly don't know much about it...only from what I've heard from those who do it.


I think as long as it doesn't become an everyday thing, occasionally doing that is fine. Some people do it as part of a weight loss intermittent fasting, One Meal A Day or OMAD is what they call it, and the idea is your body going into a somewhat fasted state the following morning and you're running on fat reserves until you replenish any carbs.

Even then, from the meal plans I have seen, it seems like the people doing it would do OMAD on Monday-Wednesday, do something like a 16 hour fast and eat twice on Thursday, then back to OMAD for Fri/Sat and another 16 hours fast eating twice on Sunday.
Posted by TigerTatorTots
The Safeshore
Member since Jul 2009
82214 posts
Posted on 12/30/24 at 9:19 am to
No, probably even beneficial as long as you don't snack later
Posted by idontyield
Tunnel Trash
Member since Jun 2022
588 posts
Posted on 12/30/24 at 9:36 am to
quote:

I guess when you think about it, our ancestors likely didn't eat multiple times throughout the day. They probably ate a meal once every few days.


And they didn't live past 40. No clue if eating once a day matters but what people did 200 yrs ago has no bearing on it.
Posted by lsugerberbaby
baton rouge
Member since Mar 2008
3067 posts
Posted on 12/30/24 at 9:55 am to
quote:


And they didn't live past 40


Link?

quote:

No clue if eating once a day matters but what people did 200 yrs ago has no bearing on it.


Well, they weren't stuffing their fat faces 3-5 times a day, and were in pretty damn good shape. Looking back at how past generations survived isn't really a bogus idea. How would you recommend we collect data?
Posted by Mingo Was His NameO
Brooklyn
Member since Mar 2016
37536 posts
Posted on 12/30/24 at 10:40 am to
quote:

And they didn't live past 40.


If you didn’t die as a baby or in combat, people generally lived about the same amount of time as they do now. Life expectancy was much lower due to infant and child birth mortality and young men killing each other
Posted by goldennugget
NIL Ruined College Sports
Member since Jul 2013
26376 posts
Posted on 12/30/24 at 1:14 pm to
I do it a lot
Posted by VolSquatch
First Coast
Member since Sep 2023
8373 posts
Posted on 12/30/24 at 3:31 pm to
quote:

And they didn't live past 40. No clue if eating once a day matters but what people did 200 yrs ago has no bearing on it.



How long would they have lasted with modern medicine?

The average age statistics from years ago are heavily skewed by a ton of different factors that we don't really have to deal with today, or at least are minimized.
Posted by LRB1967
Tennessee
Member since Dec 2020
23173 posts
Posted on 12/31/24 at 12:55 pm to
I routinely do this on vacation with no ill effects.
Posted by scottydoesntknow
Member since Nov 2023
10870 posts
Posted on 12/31/24 at 8:12 pm to
Eating one meal is not unhealthy at all. Id argue, its much easier to maintain a lean weight that way
Posted by LSUfan20005
Member since Sep 2012
9227 posts
Posted on 12/31/24 at 9:17 pm to
I’d worry that I couldn’t get adequate protein and nutrients with only one meal a day, unless eating very specific nutrient dense foods consistently.


For those referring to ancestral basis for OMAD, I think it’s much more likely that humans would have gorged on a kill for days until it was gone, then fasted or grazed on supplemental items until the next kill.
Posted by scottydoesntknow
Member since Nov 2023
10870 posts
Posted on 1/2/25 at 10:45 am to
quote:

I’d worry that I couldn’t get adequate protein and nutrients with only one meal a day, unless eating very specific nutrient dense foods consistently.


You can, unless you are just eating Krispy Kreme donuts or something. If you are eating enough meat to satisfy you for a whole day, you are eating enough.

OMAD may not be ideal for gaining weight or a bodybuilder trying to cut down to low single digit BF...but for maintaining a lean physique, its just fine
Posted by Big Scrub TX
Member since Dec 2013
39873 posts
Posted on 1/4/25 at 12:46 pm to
quote:

And they didn't live past 40.
Human lifespan hasn't changed.
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