Breast milk of women with 1st babies has more dioxin.
The breast milk of women who have given birth to their first baby contains 46% more dioxin than that of women who have had their second baby, according to a survey by the Tokyo metropolitan government released Monday. The survey, conducted on 120 women aged 25 to 34 who have lived in Tokyo for over five years, showed that their breast milk contained an averaged of 53.6 picograms of dioxin per 100 grams of breast milk. A picogram is one-trillionth of a gram. The average amount of dioxin in 100 grams of breast milk of 60 women who had given birth to their first baby was 63.5 picograms, 1.46 times the 43.6 picograms for the 60 women who had given birth to their second baby, the survey showed. The government collected breast milk samples 30 days after the women gave birth between July and October this year. The survey was the first to examine the density of dioxin in their breast milk depending on the number of babies they had, the Tokyo government said. The Health and Welfare Ministry sets the tolerable daily intake (TDI) of dioxins at 10 picograms per 1 kilogram of a person's weight. Reckoning that infants daily drink 120 grams of breast milk per 1 kilogram of their weight, a first baby will intake 7.6 times the TDI, while a second baby will consume 5.2 times the TDI. The Tokyo government believes the amount of dioxin in breast milk fed to second babies is reduced because dioxin in their mother's bodies were emitted in milk for their first baby. However, the government said that mothers do not need to stop breast-feeding babies, because infants drink breast milk for just a short period. Dioxins are carcinogenic chemical compounds that are easily absorbed by and accumulated in the human body.
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|Publication:||Japan Science Scan|
|Date:||Dec 7, 1998|
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