Guidance > Doses simplified
 
   
 
   

 

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Our Guidance on Soy usage

 

DOSES SIMPLIFIED

For Adults

A glass a day melts the thyroid away.  From USA Womans World, Mar 16 2001.  AVOIDING SOY .... as little as 30mg of soy isoflavones--the amount in 5-8 ounces of soy milk - have been proven to suppress thyroid function.  "The isoflavones in soy act like a hormone in the body. And in many women, especially those who eat large amounts of concentrated soy powder or take isoflavone supplments, this disturbs the body's hormonal balance, triggering or worsening thyroid problems," explains Dr. Larian Gillespie, author of "The Goddess Diet". Some experts are even calling for the makers of soy products to remove these antithyroid isoflavones from their products.

 

For Infants

In simple terms.  The dose in soy baby formulas means an infant gets the dose-equivalent of an adult woman taking up to ten pills a day. Or, a baby in its first year gets a total antifertility dose of 100 Pill-equivalents.  Swiss Federal Health Service , 100 g soy protein = Contraceptive Pill

 

For Males

Testosterone Reduction

Nagata and colleagues have reported an inverse association between soy product intake and serum hormone concentrations in Japanese men. Research has demonstrated that chemical compounds can have a number of other effects .The isoflavone dose was 22mg/day. Two glasses of soy milk can contain up to 100mg of isoflavones

 

For Women

Disruption of the Menstrual Cycle ( a harbinger of potential fertility problems) was caused by 45 mg/day for only 30 days. That is less than the quantity of isoflavones in two glasses of soy milk.   Irregular cycles are also a risk factor for breast cancer.

Further information from Dr Michael Bolger, Manager of RIsk Assessment at the USFDA CF, SAN, September 1997 (excerpts from original tables).

PHYTOESTROGENS - ORAL HAZARD

Phytoestrogen

Species

Effect

Daidzein/Genistein

Cheetah

Vennoclusive disease

 

 

Reproductive failure

Daidzein

Mouse

Uterine hypertrophy

Genistein

Mouse

Infertility

 

Rat

Testicular atrophy

Phytoestrogen

Human

Increased Menstrual cycle delays

 

 

Feminisation (Bourbon)

 

PHYTOESTROGEN – DOSE/RESPONSE

Compound

Species

Dose

Effect

Daidzein/Genistein

Cheetah

45 ppm

Impaired reproduction

Genistein

Mouse

20 ppm

Uterine Hypertrophy