1

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Brassicas: increasing testosterone but decreasing thyroid?

Answered on September 12, 2014
Created March 28, 2011 at 12:53 AM

I have perused the internet recently regarding vegetables(whether to include them or not, if so which are best--least fructose, least starchy carbs, most nutrients, least toxic, most plentiful where I live for the least cost). I have sifted through PALEO HACKS again and again attempting to find out info. about vegetables regarding these topics and much of it has been fruiful. A concern of mine which has arisen in these investigations is about BRASSICAS: The internet sources I've investigated state that they increase testosterone levels("cruciferous vegetable" and those of the "brassica" family). This I would look upon as desirable. I have also found contradictory messages which has been discouraging(...me from eating them). PALEO HACKS and other sources caution that brassicas are goitrogenic and reduce thyroid hormone. Who can be believed? My questions are as follows if anyone cares to give some insight into the issue: (1) Do they increase/decrease testosterone (2) "........................"thyroid hormone (3) What is the relationship between these hormones and do they not have a complementary effect/mechanism of action(which I had previously thought) (4) For general health purposes, what would be the best strategy: to include or exclude this family of vegetables(especially cabbage, turnips, rutabagas) given that one wants high testosterone and thyroid hormone? (5)Also, I have heard that these vegetables(especially cabbage) are high fructose True?Please help me in my endeavors of increasing/decreasing/balancing...ie. controlling the self.

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 11:18 PM

cardamom also has a ton of I3C in it. Indole 3 carbinol is converted in the gut to diindolylmethane (DIM). When an indole 3 carbinol supplement is ingested, there is little or no indole 3 carbinol found in the bloodstream. We measure DIM to see the effect. Gut health plays a role in the amount of DIM from I3C. But again there are no human studies that are well done on I3C but it does appear to effect sex steroid hormones status by effecting estrogen metabolism and slightly increasing the balance to favor testosterone. Very minor and not worth a patients time to do.

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 11:10 PM

Brassicas have a phyto-chemical called INDOLE-3-CARBINOL (I3C) which known to sufficiently reduce estrogen and increase Testosterone production. It also has bigtime anticancer effects and lengthens telomeres.

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 11:05 PM

no they increase it......soy decreases it. The effect is very small and not really worth talking about unless you have gynecomastia for some reason or you are transvestite.

77877f762c40637911396daa19b53094

(78467)

on March 28, 2011
at 05:10 PM

Brassicas then would reduce testosterone?

76f3ead3aa977d876bcf3331d35a36e9

(4620)

on March 28, 2011
at 03:32 PM

Nope. http://donmatesz.blogspot.com/2010/12/blood-type-diet-primal-perspective.html

F6c1df7d5699661bd1f0d6d0a6c17fc6

on March 28, 2011
at 01:10 PM

Is there a scientific basis to this blood type woo at all?

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 10:51 AM

I'm saying soy sucks because of it's negative effects on men testosterone levels

Medium avatar

(39821)

on March 28, 2011
at 04:50 AM

Yeah, in the same way that phytate blocks the absorption of other minerals, iodine becomes bound to these goitrogens and passes through, largely unabsorbed. As far as fructose is concerned, I don't think it's worth it to count the grams of fructose in vegetables. I only consume low-fructose, high-fiber fruit though, such as raspberries and blackberries.

77877f762c40637911396daa19b53094

(78467)

on March 28, 2011
at 03:54 AM

Are you contending that soy is not implicated in decreasing testosterone contrary to popular opinion(eg. conventional bodybuilding info-mation)? I will research the topic later...

77877f762c40637911396daa19b53094

(78467)

on March 28, 2011
at 03:51 AM

Do you mean Iodine simultaneously to goitrogens? Could you elaborate? And fructose...does it matter?

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5 Answers

3
Medium avatar

on March 28, 2011
at 01:52 AM

Goitrogens are only relevant if you're consuming iodine with them. If you eat kelp in the morning and brassicas at night, it's not really going to matter much.

Medium avatar

(39821)

on March 28, 2011
at 04:50 AM

Yeah, in the same way that phytate blocks the absorption of other minerals, iodine becomes bound to these goitrogens and passes through, largely unabsorbed. As far as fructose is concerned, I don't think it's worth it to count the grams of fructose in vegetables. I only consume low-fructose, high-fiber fruit though, such as raspberries and blackberries.

77877f762c40637911396daa19b53094

(78467)

on March 28, 2011
at 03:51 AM

Do you mean Iodine simultaneously to goitrogens? Could you elaborate? And fructose...does it matter?

1
E2b9c679315c7c9c7265783dde89f350

on March 28, 2011
at 04:07 AM

I can't answer about brassicas increasing testosterone, but they certainly can suppress the thyroid. If you don't currently have a thyroid problem, then I wouldn't worry about it, if you do have a thyroid problem, then I would minimize how much of them you eat. Cooking reduces the goitrogens.

Personally, hypothyroidism runs in my family- almost all the women on my mom's side of the family are hypo, and I have pretty much all of the symptoms, though the tests come out normal. Just to be on the safe side, I try to keep cruciferous vegetables to one serving a day, usually cooked.

0
A6d81b0e273cad7403cef2f1a1bdeb8a

on March 16, 2013
at 10:35 PM

Brassicas don't increase testosterone. They are actually anti-androgenic, though they do shift estrogen metabolism.

0
669790861549f3c6d54d88a65296ed19

(452)

on March 28, 2011
at 12:44 PM

The Blood Type diet (blood type O) does indeed state that most brassica's (cabbage,brussel sprouts,cauliflower) aren't beneficial to type O,except broccolli, and that they will inhibit weight loss.... Not sure what to think of that....

F6c1df7d5699661bd1f0d6d0a6c17fc6

on March 28, 2011
at 01:10 PM

Is there a scientific basis to this blood type woo at all?

76f3ead3aa977d876bcf3331d35a36e9

(4620)

on March 28, 2011
at 03:32 PM

Nope. http://donmatesz.blogspot.com/2010/12/blood-type-diet-primal-perspective.html

0
Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 03:24 AM

Travis is correct. And SHBG goes up in men due to phytoestrogens and increased levels of estradiol. We see this in eaters of soy products, obese men, and Men who aromatize testosterone......like body builders using a ton of exogenous testosterone or tons of DHEA or pregnenolone when they should not.

77877f762c40637911396daa19b53094

(78467)

on March 28, 2011
at 05:10 PM

Brassicas then would reduce testosterone?

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 11:18 PM

cardamom also has a ton of I3C in it. Indole 3 carbinol is converted in the gut to diindolylmethane (DIM). When an indole 3 carbinol supplement is ingested, there is little or no indole 3 carbinol found in the bloodstream. We measure DIM to see the effect. Gut health plays a role in the amount of DIM from I3C. But again there are no human studies that are well done on I3C but it does appear to effect sex steroid hormones status by effecting estrogen metabolism and slightly increasing the balance to favor testosterone. Very minor and not worth a patients time to do.

77877f762c40637911396daa19b53094

(78467)

on March 28, 2011
at 03:54 AM

Are you contending that soy is not implicated in decreasing testosterone contrary to popular opinion(eg. conventional bodybuilding info-mation)? I will research the topic later...

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 10:51 AM

I'm saying soy sucks because of it's negative effects on men testosterone levels

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 11:05 PM

no they increase it......soy decreases it. The effect is very small and not really worth talking about unless you have gynecomastia for some reason or you are transvestite.

Ed71ab1c75c6a9bd217a599db0a3e117

(25472)

on March 28, 2011
at 11:10 PM

Brassicas have a phyto-chemical called INDOLE-3-CARBINOL (I3C) which known to sufficiently reduce estrogen and increase Testosterone production. It also has bigtime anticancer effects and lengthens telomeres.

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