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votes

Hack my reaction to an American sweet potato, but not Jap ones

Answered on August 19, 2014
Created April 29, 2012 at 9:44 PM

Hey. So my starch of choice for the past few years has been japanese sweet potatoes. I eat them a lot as a post workout and when I can't find them, and I need starch, I cheat and eat two rice cakes or a couple red or yukon gold poatoes. Horrible I know but who cares it's like 2% of my calories. I couldn't find Japanese sweets this week so I bought regular ones (organic, garnet). A couple days ago I baked it in the oven like I usually do and ate it post workout. About an hour later I felt terrible. My stomach hurt, I had a headache, and I just felt like I had eaten a large piece of hydrogenated soy oil cake or something- just felt of gross and incredibly lethargic. Again, today I did the same thing with the same effect. What is the deal? I figured since I tolerate the Jap ones so well I'd do fine with an American one- but clearly not and I should have stuck to the white carb neolithic ones. So, what's the deal? DOes anyone know why this would be? I didn't eat the skin if that matters. I really don't think this is in my head, and I'm not eating a regular sweet potato again as far as I'm concerned.

Has anyone else had a similar experience? Do you know the deal is?

Thanks for your input!

1edb06ded9ccf098a4517ca4a7a34ebc

(14952)

on April 30, 2012
at 10:27 PM

haha. It was shorter so I could fit it in the title question.

1edb06ded9ccf098a4517ca4a7a34ebc

(14952)

on April 30, 2012
at 10:24 PM

No. I just bake them plain.

121a16aded2bed8dca492d3c9662ef4c

(1327)

on April 30, 2012
at 11:54 AM

I was expecting more people to point out that they are not even the same species of plant.

C0fcb48d7da4f76fac17318efd2cd6b8

(4069)

on April 30, 2012
at 03:09 AM

Love the Jap thing. It's SO World War II.

Ce7e28769d92d5de5533e775b1de966e

on April 30, 2012
at 02:52 AM

Totally agree with Shari, had to go through with this myself. Organic teeny store had better batches than Whole Foods. Same variety = different results. I only get from the twee store now. Good luck!

78cb3c4f70de5db2adb52b6b9671894b

(5519)

on April 30, 2012
at 02:44 AM

Oh, you beat me to it!!

1edb06ded9ccf098a4517ca4a7a34ebc

(14952)

on April 29, 2012
at 11:02 PM

Thanks, SB. I did try twice with a day rest in between, but both of them were from the same batch at Whole Foods. I guess I'll have to give it another go with a different batch from a different store, but I'm gonna need more of a respite before diving in again!

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7 Answers

4
98bf2ca7f8778c79cd3f6c962011cfdc

on April 29, 2012
at 10:04 PM

Not the answer you want I'm sure but before you go writing off all American sweet potatoes I think you need to buy one from another store and eat it and see what happens. An experiment but be repeatable with the same results or it's not much of anything. Far too many other possible factors at play here. If you try again and get the same reaction then you've got something more solid. Something tells me you will not although I certainly don't think it is in your head either. I hope you'll try it again sometime maybe once the memory of this episode isn't so clear in your head.

1edb06ded9ccf098a4517ca4a7a34ebc

(14952)

on April 29, 2012
at 11:02 PM

Thanks, SB. I did try twice with a day rest in between, but both of them were from the same batch at Whole Foods. I guess I'll have to give it another go with a different batch from a different store, but I'm gonna need more of a respite before diving in again!

Ce7e28769d92d5de5533e775b1de966e

on April 30, 2012
at 02:52 AM

Totally agree with Shari, had to go through with this myself. Organic teeny store had better batches than Whole Foods. Same variety = different results. I only get from the twee store now. Good luck!

3
78cb3c4f70de5db2adb52b6b9671894b

on April 30, 2012
at 02:43 AM

An excerpt from http://perfecthealthdiet.com/?p=1848

Clearly sweet potatoes are not safe for everyone. What might be causing the trouble?

Fructose and Fiber as Possible Confounders

One factor to consider is that there are different varieties of sweet potato. We eat an Asian sweet potato variety which is not nearly as sweet as conventional American sweet potatoes; it has a yellow flesh and a chestnut flavor. It is botanically a yam, not a sweet potato...Like so many modern foods, the standard American sweet potato has been bred for sweetness. Here is data from http://nutritiondata.com comparing 100 g of potatoes, yams, sweet potatoes, and grapes for sugar, starch, and fiber content...All have similar calories. Yams are largely sugar-free, but sweet potatoes are intermediate between grapes and potatoes in both sugar and starch content. They are sort of half fruit, half starch.

Thus, it is conceivable that sweet potatoes could trigger an issue like fructose malabsorption; or that fructose or fiber might feed certain gut infections that would not be similarly fed by potatoes...

1
153c4e4a22734ded15bf4eb35b448e85

(762)

on April 30, 2012
at 08:57 AM

I have the same reaction to sweet potatoes; it doesn't matter if they are organic, or not, I still get stomach trouble, a headache, and a stiff neck and shoulders.

I don't have fructose malabsorption, and no known allergies, I just don't understand why I get this reaction from them. And I never, ever, have a stiff neck and shoulders, not from anything else than sweet potatoes.

The purple ones seem to be ok, the orange ones are the only ones causing trouble.

1
2fd566cefde2de38e75e1bc13a966e16

on April 29, 2012
at 10:11 PM

Do you have issues with other food that might indicate a fructose malabsorption problem? American sweet potatoes are much sweeter than the Japanese variety (which is actually a yam), so depending on the quantity that could be it.

Here is a really good link related to this that mentions some other potential culprits: http://perfecthealthdiet.com/?p=1848

78cb3c4f70de5db2adb52b6b9671894b

(5519)

on April 30, 2012
at 02:44 AM

Oh, you beat me to it!!

121a16aded2bed8dca492d3c9662ef4c

(1327)

on April 30, 2012
at 11:54 AM

I was expecting more people to point out that they are not even the same species of plant.

0
2de52c93606dcd65db26ac5c3bb97c78

on December 29, 2012
at 06:27 PM

It is odd but I always had Yam before in Us and no problem. last evening I had one bake Japanese Yam and oh god around 11PM I felt the whole yam has stuck into my throat and was not going down and now 3 AM I couldnot sleep because I feel the yam just has gone done 5 cm into my body it is hurting really bad. I feel horrible. too much pain to pass it. I have drank two bottles of water but still have problem. Does anyone know the reason?

0
8ff5f83aa3f7e0d5566e582f86ac85a8

on November 29, 2012
at 02:19 AM

I almost died last month from eating a sweet potatoe was in intensive care for 3 days. Violent vommiting and low blood pressure. Doctors don't know why because the test all came back negative. I was able to eat them last year but now I can't. I tried eating one again last week to make sure and was sent back to the hospital, never again will I eat one.

0
Ba09704971e33481f5716c4790648966

(1794)

on April 30, 2012
at 01:44 AM

That is odd. I eat garnet sweet potatoes quite often.

Can't think of much that would be causing that feeling?

Did you bake it with oil? Oxidized oil?

1edb06ded9ccf098a4517ca4a7a34ebc

(14952)

on April 30, 2012
at 10:24 PM

No. I just bake them plain.

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