Is Daidzein safe for babies and kids?
Moderate risk for kidsInfants are more vulnerable to Daidzein than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.
What is daidzein?
The IUPAC name is 7-hydroxy-3-(4-hydroxyphenyl)chromen-4-one.
Also known as: 4',7-Dihydroxyisoflavone, Daidzeol, 7-hydroxy-3-(4-hydroxyphenyl)-4H-chromen-4-one, 7,4'-Dihydroxyisoflavone.
- IUPAC name
- 7-hydroxy-3-(4-hydroxyphenyl)chromen-4-one
- CAS number
- 486-66-8
- Molecular formula
- C15H10O4
- Molecular weight
- 254.24 g/mol
- SMILES
- Oc1ccc(-c2coc3cc(O)ccc3c2=O)cc1
- PubChem CID
- 5281708
Risk for babies
Moderate riskInfants are more vulnerable to Daidzein than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.
Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.
Risk for pregnant and nursing people
High riskPregnancy alters the metabolism and distribution of Daidzein, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.
Known reproductive toxicant (GHS H360) or confirmed endocrine disruptor. Placental transfer is presumed. Fetal exposure during critical developmental windows may cause structural malformations, growth restriction, or functional deficits.
Regulatory consensus
2 regulatory and scientific bodies have classified Daidzein. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| FDA | 1999 | GRAS as component of soy foods | |
| EFSA | 2015 | No safety concern at dietary levels |
Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.
Where kids encounter daidzein
- Food
- Dietary Supplement
Safer alternatives
Lower-risk approaches that achieve a similar outcome to Daidzein:
-
S-equol supplement (direct metabolite)
Trade-offs: Only 30-50% of Western populations produce equol naturally from daidzein. Direct supplementation bypasses this. Limited clinical data.Relative cost: 3-5×
Frequently asked questions
Is daidzein safe for kids?
Infants are more vulnerable to Daidzein than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.
What should I do if my child is exposed to daidzein?
Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.
See Daidzein in the baby app
Look up products containing daidzein, compare to alternatives, and explore the full data record.
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Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →