3

votes

Fruits vs starchy tubers

Answered on August 19, 2014
Created March 19, 2012 at 8:35 AM

So I was checking out the paleo food list and I noticed that it recommends all the fruits, but condemns starchy tubers. Now I know sweet potatoes have a lower fructose count per 100 grams than ANY fruit, so what's the deal? Fructose is the most harmful sugar, I'm not saying fruits are bad, but why condemn sweet potatoes and yams and recommend lots of fruits?

7dc950fc76a046048e683d2a27dced37

on September 07, 2013
at 01:28 AM

Made me laugh Dave!

C3f9730405f7885f9ccaad364404c433

(412)

on June 15, 2012
at 03:00 PM

WOW thanks cliff!!!

Cf938ac46500e200c97f6adbb3365f64

(324)

on April 06, 2012
at 09:24 AM

both white and sweet potatoes are nutrient dense not as much as vegetables but then again neither are vegetables as nutrient dense as herbs

D12142c8cafb16d9af10b3362cb8fb62

(1590)

on March 20, 2012
at 09:37 AM

Teh white potatoez hav no nutritionz unlikes dem sweeet pots.

D12142c8cafb16d9af10b3362cb8fb62

(1590)

on March 20, 2012
at 09:35 AM

Cooking isn't neolithic. Sometimes paleohacks is just retarded.

5c7daadec6926272d6d8016c823c5d8f

(18)

on March 20, 2012
at 03:23 AM

Yeah I think I did actually register again lol, but yeah I've heard that fructose is metabolized in the liver like alcohol, and some thing about how it's the only sugar that does not diffuse right on our body. Trust me i'm not bashing fruit, I was just confused about these "paleo food lists" thanks for clearing it up though

96bf58d8c6bd492dc5b8ae46203fe247

(37227)

on March 19, 2012
at 10:55 PM

Yeah, but the key words are "if the dosage is too high." IMO, you could say the same for starch. Moderate fruit and starch is better than a lot of either. Nature intended us to use both.

Medium avatar

(39821)

on March 19, 2012
at 10:29 PM

not sure if serious

96bf58d8c6bd492dc5b8ae46203fe247

(37227)

on March 19, 2012
at 04:28 PM

Did you register again? You could have just clicked on "edit" in your question. Anyhow, interesting links! I still say, why not enjoy both starch and fructose within your overall food mix?

A968087cc1dd66d480749c02e4619ef4

(20436)

on March 19, 2012
at 01:57 PM

I find myself agreeing with everything Beth has ever said! Everone has a different "food list" based on their current understanding. I just recently added fruit back in and seem to be doing well (better than a no fruit PHD).

7dc950fc76a046048e683d2a27dced37

on March 19, 2012
at 10:59 AM

Depends on your paleo list ... tubers are on mine. Thanks Perfect Health Diet!

6b8d12fc3e43179f9ae1765a4d1a9dc2

(5914)

on March 19, 2012
at 10:32 AM

what is the paleo food list?

B0fe7b5a9a197cd293978150cbd9055f

(8938)

on March 19, 2012
at 09:08 AM

Fructose is not the most harmful sugar, it all depends on the context. Fructose can be great to replete liver glycogen.

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9 Answers

12
E5c7f14800c5992831f5c70fa746dc5c

(12857)

on March 19, 2012
at 03:25 PM

http://www.sciencedirect.com/science/article/pii/S8756328208000823- "The results suggested that glucose rather than fructose exerted more deleterious effects on mineral balance and bone"

http://www.ncbi.nlm.nih.gov/pubmed/1221903- "Rats on high sucrose diet deficient in vitamin D maintain calcium homoestasis unlike rats fed glucose, they have normal uptake by bone and development but lighter bones than vitamin D fed rats"

"Fruit is protective against prostate cancer by lowering serum phosphate" -http://www.ncbi.nlm.nih.gov/pubmed/11036473

"Fructose causes a greater oxygen consumption than glucose and increases CO2 and blood temperature higher" -http://ajpendo.physiology.org/content/264/4/E504.abstract

"During exercise addition of fructose to glucose increases carbohydrate metabolism by 50%"- http://www.ncbi.nlm.nih.gov/pubmed/15946410

"Fructose decreases capillary leakage and in one study after 4 weeks and 8 weeks a 60% fructose diet produced a 51% and a 56% decrease in capillary leakage, respectively"- http://www.ncbi.nlm.nih.gov/pubmed/9633792

"Fructose can protect against the stress of increased hydrogen peroxide"- http://www.sciencedirect.com/science/article/pii/S0008621509002456

C3f9730405f7885f9ccaad364404c433

(412)

on June 15, 2012
at 03:00 PM

WOW thanks cliff!!!

10
E12ead3bf63c94b5b619b03722ef554f

on March 19, 2012
at 09:09 AM

check your sources again! Both starchy tubers and fruits can be part of your Paleo diet plan if you tolerate them well!

4
96bf58d8c6bd492dc5b8ae46203fe247

(37227)

on March 19, 2012
at 03:21 PM

It would really help if you shared a link to the list you mentioned, since there are many but most that I've seen recommend portion control for both starch and fructose--control, not avoidance.

I am suspicious of any plan that doesn't offer flexible options because humans come with many "option packages" (think gut flora communitites) and life histories and therefore we don't thrive on exactly the same things.

If you follow VLC you might have to choose between fruit and starch on a given day but can include both in a weekly rotation; otherwise, why not a little of both?

If it's a whole food--or a chunk of one--I'll give it a try and that's what my ancestors would've done too.

3
F80aaa96354eb749a8a5efdda3feba7d

on March 19, 2012
at 05:45 PM

The first link is very dated. Lean meats have been disputed for years now in the pale/primal world. So I wouldn't listen to that website in general. Sounds like the just quoted Dr. Cordain's earlier book that even be has since said is outdated.

The second is the same. "Lean hamburger" gasp NEVER! lol you also see it says diet soda. Uh... really? And frankly it says No Bacon. Silly silly site.

The third is all the same.

I think where this came from was because you wouldn't eat tubers raw thus meaning paleo men and women wouldn't have either truth thus not consuming them. The great thing is ancestral eating has come a long way from just "eat as a paleo man would". We see things like cooked meats, coconuts even though only in the tropics, even arguably some dairy is beneficial to us. This includes sweet potatoes.

*On my phone sorry for silly mistakes.

D12142c8cafb16d9af10b3362cb8fb62

(1590)

on March 20, 2012
at 09:35 AM

Cooking isn't neolithic. Sometimes paleohacks is just retarded.

2
380ba09fce670758a46a7c5522e908b9

on March 19, 2012
at 02:45 PM

Because there's lots of good stuff (vitanutrients) in fruit, but very little in tubers.

D12142c8cafb16d9af10b3362cb8fb62

(1590)

on March 20, 2012
at 09:37 AM

Teh white potatoez hav no nutritionz unlikes dem sweeet pots.

Medium avatar

(39821)

on March 19, 2012
at 10:29 PM

not sure if serious

Cf938ac46500e200c97f6adbb3365f64

(324)

on April 06, 2012
at 09:24 AM

both white and sweet potatoes are nutrient dense not as much as vegetables but then again neither are vegetables as nutrient dense as herbs

2
1a98a40ba8ffdc5aa28d1324d01c6c9f

(20378)

on March 19, 2012
at 08:39 AM

Lots of paleo folks are eating sweet potatoes and even white potatoes now. To get the glucose without the fructos...

0
D613cc4b9409009d5735a23e9fec5886

(143)

on May 09, 2012
at 10:39 PM

I'm just starting Paleo - reading Loren Cordain's book. It says no potatoes or tubers I thought - but I am reading on the net some Paleo people do eat sweet tomatoes. I'm a little confused about what a 'tuber' is in the first place. I have hypothyroidism and hypoglycemia - are potatoes of any kind recommended on paleo? Also trying to lose 10-15 lbs....

0
C4f1a0c70c4e0dea507c2e346c036bbd

on March 19, 2012
at 10:11 PM

I was reading Archevore's No Macronutrient essay. He claims that fructose is toxic if the dosage is too high. He seems to favor starches.

I also saw or read somewhere that fructose is metabolized in the liver and is sort of like alchohol in its breakdown.

5c7daadec6926272d6d8016c823c5d8f

(18)

on March 20, 2012
at 03:23 AM

Yeah I think I did actually register again lol, but yeah I've heard that fructose is metabolized in the liver like alcohol, and some thing about how it's the only sugar that does not diffuse right on our body. Trust me i'm not bashing fruit, I was just confused about these "paleo food lists" thanks for clearing it up though

96bf58d8c6bd492dc5b8ae46203fe247

(37227)

on March 19, 2012
at 10:55 PM

Yeah, but the key words are "if the dosage is too high." IMO, you could say the same for starch. Moderate fruit and starch is better than a lot of either. Nature intended us to use both.

96bf58d8c6bd492dc5b8ae46203fe247

(37227)

on March 19, 2012
at 04:28 PM

Did you register again? You could have just clicked on "edit" in your question. Anyhow, interesting links! I still say, why not enjoy both starch and fructose within your overall food mix?

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