Food Surveillance Information Sheet Number 167
Table 3: Estimated average dietary intakes of
isoflavones by infants on soya-based infant formula
Table
4: Comparison of levels of isoflavones (as aglucones) found in soya-based infant
formulae
TABLE 3: Estimated average dietary intakes of
isoflavones by infants on soya-based infant formula
| Age |
Average body weight (kg) |
Average consumption (litres) |
Mean concentration |
Mean estimated intake |
|
|
|
(mg isoflavone/litre formula as fed) |
(mg isoflavone/kg bw/day) |
| 1-2 months |
4.5 |
0.699 |
32 |
5.0 |
| 4-6 months |
7 |
0.983 |
32 |
4.5 |
TABLE 4: Comparison of levels of isoflavones (as
aglucones) found in soya-based infant formulae
|
Number of brands analysed |
Total isoflavone level |
Estimated isoflavone intake |
|
|
(mg isoflavone/litre formula as fed) |
(mg isoflavone /kg bw/day) |
| US (Setchell et al.) |
5 |
32 - 47 |
4.5-8.0 |
| US (Murphy et al.) |
6 |
25-30 |
5-12 (dep on age) |
| NZ (Irvine et al.) |
5 |
NAa |
3.8 (1 month)
3.3 (2 months)
2.9 (4
months) |
| Aus (Knight et. al.) |
4 |
18 - 21b |
NAc |
| UK (Reading) |
6 |
18-41 (Mean= 32) |
5.0 (1-2 months)
4.5 (4-6months) |
NA - not available
(a) Levels of total glycitein were not determined.
Results for levels of genistein and daidzein in powdered soya-based infant
formula are given in mg/kg powder formula and not in mg/litre made-up formula.
(b) Levels of total glycitein were not determined.
(c) Exposure of infants to isoflavonoids, expressed in
units of mg isoflavonoids per day per m2 of body surface area, which
is not comparable to units used by the other workers cited.
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These pages were last updated on 30th October 1998
