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Fat only (95+%) diet - what would happen?

by (143)
Updated about 18 hours ago
Created March 31, 2011 at 4:14 AM

I was wondering about ketosis and high fat/low carb diets and taking that to the extreme, what would happen if a person took in very low carbs and very low protein. Like, drank normal calories worth of coconut milk for 2 days? 3 days? 1 week? 2 weeks?

Just curious.

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1138 · March 31, 2011 at 5:27 PM

Can you post the link to where Paul at PHD recommends this one day a week fat fast? Much appreciated. I do IF and am planning to do a week of water fasting semi-yearly.

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720 · March 31, 2011 at 3:56 PM

..oh and I'm supposedly in ketosis (based on ketostix reading) and still not losing.

Da681d976130df15aac3984013aaad6d
720 · March 31, 2011 at 3:55 PM

I feel the same way, I can't lose weight. I'm off fruit totally so I'm just eating protein, fat and vegetables plus exercising and I've lost a total of 5 pounds in 45 days, and it goes up and and down by two pounds all the time, can't win either.

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1702 · March 31, 2011 at 1:50 PM

I wouldn't mind that as long as it meant I was losing weight. I don't understand my body at all. I feed it good food and its supposed to want to be thin, but no! Gain gain gain! Ugh. I cannot win :(

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668 · March 31, 2011 at 1:44 PM

I wouldn't do avocados. Too many O-6's. Do all coconut, or butter, or cream. Though ease into coconut. I spent a few days as captain of the SS Porcelain when I went (pardon my french) balls deep with the coconut milk/oil. Not fun.

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17949 · March 31, 2011 at 5:31 AM

This is true. Paul at PerfectHealthDiet recommends going a single way with only coconut fat so as to reap the benefits of autophagy on a weekly basis. I don't see it being a good thing beyond that. Supposedly a week of fasting every year is a good thing, but yeah not long-term that's for sure.

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17949 · March 31, 2011 at 4:45 AM

I think they at least get 10% as proteins. As I know it the diets have to be very high in coconut fat so as to maximize ketone production and minimize glucose needs. Medium-chain fats get turned to ketone bodies much more prolifically than long-chain fats. We're talking at least 50% of cals as coconut. I think you can sustain that indefinitely.

2b423e7f4d4d6e13e820dcee5a3be746
143 · March 31, 2011 at 4:25 AM

Hrm, interesting. Yeah, that's kind of what I was thinking. But I can't help but think about epileptic children who are put on high fat diets and highly restrictive with carbs and proteins ... what about them?

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6 Answers

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17949 · March 31, 2011 at 4:21 AM

Dietary fat is chemically a triglyceride. 3 fatty acids bound to a glycerol molecule. Glycerol can actually be turned into glucose and my guess is that much of the dietary glycerol would be turned into glucose, possibly providing a fair amount. But I think you would probably catabolize your muscles to a degree.

It would be a downward spiral to say the least.

2b423e7f4d4d6e13e820dcee5a3be746
143 · March 31, 2011 at 4:25 AM

Hrm, interesting. Yeah, that's kind of what I was thinking. But I can't help but think about epileptic children who are put on high fat diets and highly restrictive with carbs and proteins ... what about them?

Be1dbd31e4a3fccd4394494aa5db256d
17949 · March 31, 2011 at 4:45 AM

I think they at least get 10% as proteins. As I know it the diets have to be very high in coconut fat so as to maximize ketone production and minimize glucose needs. Medium-chain fats get turned to ketone bodies much more prolifically than long-chain fats. We're talking at least 50% of cals as coconut. I think you can sustain that indefinitely.

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1138 · March 31, 2011 at 4:58 AM

The Perfect Health Diet (perfecthealthdiet.com) advocates ~70% fat. The Optimal Diet recommends ~80% fat. PaNu for weight loss recommends ~80% fat as well, and for healthy people who don't need to lose weight the PaNu fat macro is still high at around ~65-75% (though he doesn't stress particular macro ratios, if you're doing it right, it'll come out to those percentages anyhow).

The only diets that are 90%+ fat are, as you've noted, therapeutic ketogenic diets and 'fat fasts' where consumption is completely fats, and in those cases it is a last resort. If you're not experiencing terrible suffering or life-threatening conditions then why would you event want to go above 80%? Perfecthealthdiet.com has a series on risks of prolonged diets without adequate starches/carbs, and PaNu has recently come out in favor of starches up to 20% (depending on activity level) as very healthy.

It is really easy to stay in the above recommended ranges--have your meals just be meat/fish/eggs with a side of veggies/tubers all drowned in butter/coconut oil. Very simple, very healthy, and best of all, very tasty!

3020fb359dfbedaf90f1611b036d3432
1138 · March 31, 2011 at 5:27 PM

Can you post the link to where Paul at PHD recommends this one day a week fat fast? Much appreciated. I do IF and am planning to do a week of water fasting semi-yearly.

Be1dbd31e4a3fccd4394494aa5db256d
17949 · March 31, 2011 at 5:31 AM

This is true. Paul at PerfectHealthDiet recommends going a single way with only coconut fat so as to reap the benefits of autophagy on a weekly basis. I don't see it being a good thing beyond that. Supposedly a week of fasting every year is a good thing, but yeah not long-term that's for sure.

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7967 · March 31, 2011 at 12:29 PM

Diarrhea would be the first side-effect.

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229 · March 31, 2011 at 4:20 AM

Death from the lack of essential amino-acids.

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0 · May 08, 2013 at 4:28 AM

Maybe you're gaining muscle which weighs more while loosing fat.

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1702 · March 31, 2011 at 1:40 PM

I'm wondering about this myself because I lost a lot of weight my first week of paleo but so far this week I've gained two pounds. I've been super super strict, unlike my boyfriend who still is eating sandwiches and protein shakes (on paleo, he says).

I'm desperate. I'm going to do a day where all I do is coconut milk or avocados and see what happens.

9aa2a816c61170cc0183a68be0386ba5
1702 · March 31, 2011 at 1:50 PM

I wouldn't mind that as long as it meant I was losing weight. I don't understand my body at all. I feed it good food and its supposed to want to be thin, but no! Gain gain gain! Ugh. I cannot win :(

7b494127ac67e85e572c5222aaee9b4d
668 · March 31, 2011 at 1:44 PM

I wouldn't do avocados. Too many O-6's. Do all coconut, or butter, or cream. Though ease into coconut. I spent a few days as captain of the SS Porcelain when I went (pardon my french) balls deep with the coconut milk/oil. Not fun.

Da681d976130df15aac3984013aaad6d
720 · March 31, 2011 at 3:56 PM

..oh and I'm supposedly in ketosis (based on ketostix reading) and still not losing.

Da681d976130df15aac3984013aaad6d
720 · March 31, 2011 at 3:55 PM

I feel the same way, I can't lose weight. I'm off fruit totally so I'm just eating protein, fat and vegetables plus exercising and I've lost a total of 5 pounds in 45 days, and it goes up and and down by two pounds all the time, can't win either.

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