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How Much Iodine is in Roasted Seaweed Snacks?

by (1667)
Updated about 6 hours ago
Created February 17, 2012 at 5:27 PM

I was wondering if anybody had a fix on how much iodine is contained in those thin sheets of Nori/ Seaweed snacks they sell at Trader Joes and Whole Paycheck?

C56baa1b4f39839c018180bf63226f7d
3499 · May 28, 2013 at 5:41 AM

That would be an extremely large sheet.

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116 · May 28, 2013 at 4:35 AM

This information is misleading. Nori can contain up to 300 mcg of iodine per sheet.

019c50db5bd952961ac2165c8ebfe804
10 · May 27, 2013 at 10:33 PM

Japanese get thyroid issues too! Seems they too are only human... #womp http://jcem.endojournals.org/content/78/2/393.abstract

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2626 · April 15, 2013 at 6:21 PM

The canola oil is something like 70% of the calories, but that only comes to about 2g of oil. That may be more than you want to ingest, but it's not going to kill anyone.

C56baa1b4f39839c018180bf63226f7d
3499 · March 11, 2013 at 8:37 PM

That sounds a lot like the saltine crackers challenge. Don't those things usually paste themselves to the surface of your mouth?

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3979 · March 11, 2013 at 6:13 PM

Actually, it looks like if you eat two packages (which isn't a lot at all) you'll get 100% DV of iodine. That's not bad at all. You'd have to eat 24 of the tiny sheets, not packages. I could do that in 15 seconds.

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1667 · February 27, 2012 at 11:50 PM

Really? Wow that is a great honor, especially considering all the in shape people on here. I owe it all to the information on this site.

3864f9a2af09b1b447c7963058650a34
3703 · February 25, 2012 at 9:00 AM

I'd hate to objectify the um washing machine, but I'd vote them the best abs at paleohacks.  *haaa ahhh*

C56baa1b4f39839c018180bf63226f7d
3499 · February 21, 2012 at 5:43 PM

Yeah. Kelp flakes are the best source if you want a natural source. A light dusting meets the RDI.

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1667 · February 21, 2012 at 5:38 PM

Right on, so basically not the best source.

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1667 · February 21, 2012 at 5:35 PM

Why thank you Renee, thats my Paleo washing machine :-).

F92e4ca55291c3f3096a3d4d3d854986
11683 · February 18, 2012 at 3:13 AM

a tad off-topic, but your photo makes me crazy.

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32518 · February 18, 2012 at 2:34 AM

Good to know, thanks!

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277 · February 17, 2012 at 10:13 PM

Indeed. The only brand of roasted seaweed I buy now is Seasnax because they just use seaweed, olive oil, and sea salt. They are incredibly expensive for what you get though.

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15 Answers

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C56baa1b4f39839c018180bf63226f7d
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3499 · February 17, 2012 at 7:43 PM

Here comes the math:

  • RDI for iodine in the adult male: 95mcg.
  • Approximate iodine content of nori: 16mcg/g
  • Mass of a sheet of nori: 3g
  • Snack strips in a sheet of nori: approximately 12.

So you would have to eat about 24 nori snacks to get your RDI of iodine.

C56baa1b4f39839c018180bf63226f7d
3499 · May 28, 2013 at 5:41 AM

That would be an extremely large sheet.

D74288318247c62923457d39a068e3a7
116 · May 28, 2013 at 4:35 AM

This information is misleading. Nori can contain up to 300 mcg of iodine per sheet.

C56baa1b4f39839c018180bf63226f7d
3499 · March 11, 2013 at 8:37 PM

That sounds a lot like the saltine crackers challenge. Don't those things usually paste themselves to the surface of your mouth?

194d8e8140425057fe06202e1e5822a7
3979 · March 11, 2013 at 6:13 PM

Actually, it looks like if you eat two packages (which isn't a lot at all) you'll get 100% DV of iodine. That's not bad at all. You'd have to eat 24 of the tiny sheets, not packages. I could do that in 15 seconds.

C56baa1b4f39839c018180bf63226f7d
3499 · February 21, 2012 at 5:43 PM

Yeah. Kelp flakes are the best source if you want a natural source. A light dusting meets the RDI.

9b0a4701e373d4dd13831cfb9b13f42d
1667 · February 21, 2012 at 5:38 PM

Right on, so basically not the best source.

Ce41c230e8c2a4295db31aec3ef4b2ab
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32518 · February 17, 2012 at 8:33 PM

I'd be more concerned about the canola oil they use...

72cf727474b8bf815fdc505e58cadfea
2626 · April 15, 2013 at 6:21 PM

The canola oil is something like 70% of the calories, but that only comes to about 2g of oil. That may be more than you want to ingest, but it's not going to kill anyone.

Ce41c230e8c2a4295db31aec3ef4b2ab
32518 · February 18, 2012 at 2:34 AM

Good to know, thanks!

5fb654380d04ac372b750ca3faad2e99
277 · February 17, 2012 at 10:13 PM

Indeed. The only brand of roasted seaweed I buy now is Seasnax because they just use seaweed, olive oil, and sea salt. They are incredibly expensive for what you get though.

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8979 · February 17, 2012 at 6:57 PM

Not much, but they are addictive, aren't they?

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10 · May 27, 2013 at 10:03 PM

Who cares if 10 M japanese people survive just fine? Would you say the same abotu sun exposure with blacks in Africa and Whites in Antartica? No? Well...

And again, what Thyroid Patient said is way more accurate and substantiated than these ludicrous claims. Their kids suffer from goiters too.. they have huge side effects from eating too much but like everywhere else, thyroid issues are hard to detect so perhaps thats why its under reported. Besides... I'm not Japanese and dont have their tolerance (whether genetic or environmental).

Gotta be careful with this stuff, I ate a bunch of seaweed and now I'm worried. Sigh.

019c50db5bd952961ac2165c8ebfe804
10 · May 27, 2013 at 10:33 PM

Japanese get thyroid issues too! Seems they too are only human... #womp http://jcem.endojournals.org/content/78/2/393.abstract

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10 · April 15, 2013 at 5:28 PM

Iodine is essential element for immune system in fighting cancers. And it is almost diminished from our foods or replaced with bromide (in breads for example), whichis not good for your health. Bromides and fluorides are to avoid. I am a breast cancer survivor and like to snack on Kirkland's winter harvest seaweed from Costco. Even iodine in iodinized salt is not enough for DV% wee need.

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15 · February 20, 2014 at 3:11 PM

Chelated iodine found in seaweed is not the same as potassium iodide used in salt supplementation and Lugol. It does not have the same bioavailbility in the body, longer excretion times, does not peak and appears to be much safer. The safe limit according to the World Health Organisation for iodine is 1100 mcg/day. You would need to eat about 3000 mcg/iodine from seaweed to have the same effect. The issues with iodine tipping your thyroid into overactive are nearly all associated with potassium iodide use and supplementation.

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0 · September 16, 2013 at 8:02 PM

@air_hadoken, What I've found doesn't match your figures (?):

  • RDI for iodine in the adult male: 150 mcg (not 95mcg)
  • Per Trader Joes, each 10gram package of Roasted Seaweed = 320 mcg iodine
  • So if you eat the whole package (2 servings), you'll get 213% of your RDI
  • One sheet of Eden's Nori = 2.5 grams and 70% of RDI = 105 mcg
  • Like Dragon Fly, I also don't like the corn or canola oil additive Costco or TJ's uses (vs olive, coconut, avocado oil...)

Per my son's Swedish Physician's endocrinologist, iodine is like vitamin C in that if you take to much, you just pee it out. I'm pretty touchy about all this because my 10 yr old has goiter, which is said to be caused by too little or too much iodine by the nautropathic world but this Sw. Phy endo is adamant that more iodine than you need is harmless. Going for the RDI, and hoping at least that's a good number. Appreciate any loan cries of reason (facts) on this!

Fee4383da308a56a267eed82f0244ef7
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0 · September 16, 2013 at 8:02 PM

@air_hadoken, What I've found doesn't match your figures (?):

  • RDI for iodine in the adult male: 150 mcg (not 95mcg)
  • Per Trader Joes, each 10gram package of Roasted Seaweed = 320 mcg iodine
  • So if you eat the whole package (2 servings), you'll get 213% of your RDI
  • One sheet of Eden's Nori = 2.5 grams and 70% of RDI = 105 mcg
  • Like Dragon Fly, I also don't like the corn or canola oil additive Costco or TJ's uses (vs olive, coconut, avocado oil...)

Per my son's Swedish Physician's endocrinologist, iodine is like vitamin C in that if you take to much, you just pee it out. I'm pretty touchy about all this because my 10 yr old has goiter, which is said to be caused by too little or too much iodine by the nautropathic world but this Sw. Phy endo is adamant that more iodine than you need is harmless. Going for the RDI, and hoping at least that's a good number. Appreciate any loan cries of reason (facts) on this!

Fee4383da308a56a267eed82f0244ef7
0
0 · September 16, 2013 at 8:01 PM

@air_hadoken, What I've found doesn't match your figures (?):

  • RDI for iodine in the adult male: 150 mcg (not 95mcg)
  • Per Trader Joes, each 10gram package of Roasted Seaweed = 320 mcg iodine
  • So if you eat the whole package (2 servings), you'll get 213% of your RDI
  • One sheet of Eden's Nori = 2.5 grams and 70% of RDI = 105 mcg
  • Like Dragon Fly, I also don't like the corn or canola oil additive Costco or TJ's uses (vs olive, coconut, avocado oil...)

Per my son's Swedish Physician's endocrinologist, iodine is like vitamin C in that if you take to much, you just pee it out. I'm pretty touchy about all this because my 10 yr old has goiter, which is said to be caused by too little or too much iodine by the nautropathic world but this Sw. Phy endo is adamant that more iodine than you need is harmless. Going for the RDI, and hoping at least that's a good number. Appreciate any loan cries of reason (facts) on this!

Fee4383da308a56a267eed82f0244ef7
0
0 · September 13, 2013 at 7:23 PM

air_hadoken, are you using "New Math"?

  • RDI for iodine in the adult male: 150 mcg (not 95mcg)
  • Per Trader Joes, each 10gram package of Roasted Seaweed = 320 mcg iodine
  • So if you eat the whole package (2 servings), you'll get 213% of your RDI
  • One sheet of Eden's Nori = 2.5 grams and 70% of RDI = 105 mcg
  • Like Dragon Fly, I also don't like the corn or canola oil additive Costco or TJ's uses (vs olive or avocado oil)

Per my son's Swedish Physician's endocrinologist, iodine is like vitamin C in that if you take to much, you just pee it out. I'm pretty touchy about all this because my 10 yr old has goiter, which is said to be caused by too little or too much iodine by the nautropathic world but this Sw. Phy endo is adamant that more iodine than you need is harmless. Going for the RDI for now, and would appreciate any good info people have on goiter and iodine!

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1137 · May 28, 2013 at 12:26 AM

Surely the overall effect is positive. They live some 5 years longer than we do.

B82f2515ba5a800bed018c9536f9108d
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1137 · April 15, 2013 at 7:54 PM

100 M Japanese intake milligrams (yes, milligrams) of iodine per day without any apparent overdosing.

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0 · March 11, 2013 at 5:28 PM

I would avoid seaweed foods or snacks, since the iodine content can vary from 300mcg to 10000mcg between plants -- high enough to induce iodine thyroid dysfunction. Even 2000mcg can shut down a thyroid. Physicians even use Lugols (2000mcg iodine) in hospitals to shut down a thyroid storm.

Amiodarone -- a heart drug -- contains 2000mcg iodine and it is well established that 50% of the people who take this med will end up with thyroid damage from the high iodine.

See iodine-induced hypothyroidism and iodine-induced hyperthyroidism.

And contrary to public opinion, people in Japan suffer from eating seaweed too.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1924637/

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0 · March 03, 2013 at 12:27 AM

http://www.healthaliciousness.com/articles/natural-foods-high-in-iodine.php

The link above says that 1/4 of an ounce of dried seaweed has 4500 mcg of iodine. I am looking at Kirkland seaweed snacks that I bought at costco. The package states that a 3.4-gram serving size is a fifth of a pack. A quarter of an ounce would be about 8 grams, so if the link is correct, somewhere around half a pack, or 2.5 servings, gives you 4500 mcg of iodine (and 50 calories). These are the Kirkland Signature Roasted Seasoned Seaweed Winter Harvest.

5a16403ca7e9a241cb515c97cff17951
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0 · October 08, 2012 at 2:14 AM

The whole9 reported that one sheet has 70% of the iodine daily recommendation

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