Safety Profile
Known Safety Concerns
- Non-prenatal multivitamins should NOT be used in pregnancy — excess preformed vitamin A
- Iron content may cause constipation and GI distress
- Iodine content may be excessive or insufficient depending on product
- DHA source should be verified (fish-derived vs algal) for allergen and contaminant reasons
Contraindications
- Non-prenatal multivitamins should NOT be used in pregnancy — excess preformed vitamin A
- Iron content may cause constipation and GI distress
Interactions
Information not yet available for this ingredient profile.
Evidence and Scientific Findings
Ingredient Overview
Prenatal multivitamins are specifically formulated for pregnancy, with higher folate (for neural tube defect prevention) and iron, and lower or zero preformed vitamin A (substituted with beta-carotene). They are generally safe and recommended. Key risks come from taking non-prenatal multivitamins during pregnancy (excess preformed vitamin A) or from iodine content variability. DHA is often co-formulated.
Biological and Chemical Classification
- Scientific Name
- Prenatal multivitamin/multimineral
Mechanism of Action
Information not yet available for this ingredient profile.
Clinical Evidence of Effectiveness
Information not yet available for this ingredient profile.
Pharmacokinetics
Information not yet available for this ingredient profile.
Recommended Dosage
Information not yet available for this ingredient profile.
SETI — Scientific Evidence Transparency Index
Executive Summary — Ingredient Assessment
- 10 studies reviewed
- 0 high-quality studies (meta-analysis or RCT)
- Main clinical benefit observed: Vitamin
- Evidence consistency: High consistency across studies (100%)
- Non-prenatal multivitamins should NOT be used in pregnancy — excess preformed vitamin A
- Iron content may cause constipation and GI distress
- Iodine content may be excessive or insufficient depending on product
- DHA source should be verified (fish-derived vs algal) for allergen and contaminant reasons
The available scientific evidence for Prenatal Multivitamin indicates notable safety signals that warrant caution. Use should be considered carefully and monitored, particularly in sensitive populations or alongside other medications.
Total SETI Score
High risk| Evidence quality | 10/40 |
| Evidence consistency | 20/20 |
| Safety signals | 0/20 |
| Study recency | 10/10 |
| Evidence transparency | 10/10 |
Evidence Summary
- 10 studies reviewed
- 0 high-quality studies (meta-analysis or systematic review)
- 0 studies identified benefits or no safety concern (GREEN)
- 10 studies reported limited or advisory safety evidence (YELLOW)
Evidence Policy
Only peer-reviewed scientific literature indexed in PubMed or comparable databases is included in this evaluation. Commercial websites, blogs, and marketing materials are excluded. All references include direct traceable links to source documents.
Last updated: 23 მარ 2026, 15:11
Evidence Distribution
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Observational / other LOW evidence YELLOWIndependent and combined associations of maternal one-carbon nutrition biomarkers and dietary patterns with epigenetic age acceleration: Evidence from the Boston Birth Cohort. ↗Jabin N et al.. Independent and combined associations of maternal one-carbon nutrition biomarkers and dietary patterns with epigenetic age acceleration: Evidence from the Boston Birth Cohort.. Geroscience. 2026. PMID:41801618.PMID 41801618 ↗Journal GeroscienceYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41801618/
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Observational / other LOW evidence YELLOWAn HPLC-MS-Based Method for Determination of the D- and L- 5-Methyltetrahydrofolate Isomer Ratio in Dietary Supplements. ↗Wang X et al.. An HPLC-MS-Based Method for Determination of the D- and L- 5-Methyltetrahydrofolate Isomer Ratio in Dietary Supplements.. J AOAC Int. 2026. PMID:40971990.PMID 40971990 ↗Journal J AOAC IntYear 2026Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/40971990/
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Observational / other LOW evidence YELLOWThe effect of folic acid or multivitamin containing folic acid supplementation during pregnancy on enamel structure of deciduous teeth: an ultrastructural and… ↗AbuBakr N et al.. The effect of folic acid or multivitamin containing folic acid supplementation during pregnancy on enamel structure of deciduous teeth: an ultrastructural and microanalytical study.. Head Face Med. 2025. PMID:41318609.PMID 41318609 ↗Journal Head Face MedYear 2025Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41318609/
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Observational / other LOW evidence YELLOWThe association between maternal prenatal folic acid and multivitamin supplementation and autism spectrum disorders in offspring: An umbrella review. ↗Abate BB et al.. The association between maternal prenatal folic acid and multivitamin supplementation and autism spectrum disorders in offspring: An umbrella review.. PLoS One. 2025. PMID:41252376.PMID 41252376 ↗Journal PLoS OneYear 2025Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/41252376/
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Observational / other LOW evidence YELLOW[Research progress on the association between prenatal nutritional factors and autism spectrum disorder]. ↗Zhao WL et al.. [Research progress on the association between prenatal nutritional factors and autism spectrum disorder].. Zhonghua Yu Fang Yi Xue Za Zhi. 2025. PMID:40955030.PMID 40955030 ↗Journal Zhonghua Yu Fang Yi Xue Za ZhiYear 2025Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/40955030/
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Observational / other LOW evidence YELLOWReproductive decision-making and pregnancy in germline CDH1 variant carriers. ↗Gallanis AF et al.. Reproductive decision-making and pregnancy in germline CDH1 variant carriers.. J Med Genet. 2025. PMID:40541392.PMID 40541392 ↗Journal J Med GenetYear 2025Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/40541392/
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Observational / other LOW evidence YELLOWThe effects of early childhood probiotic intake on the association between prenatal micronutrient supplementation and neurobehavioral development in preschool children: a four-way… ↗Ding L et al.. The effects of early childhood probiotic intake on the association between prenatal micronutrient supplementation and neurobehavioral development in preschool children: a four-way decomposition analysis.. Front Nutr. 2025. PMID:40469665.PMID 40469665 ↗Journal Front NutrYear 2025Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/40469665/
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Observational / other LOW evidence YELLOWThe Individual and Combined Effects of Prenatal Micronutrient Supplementations on Neurobehavioral Developmental Disorders in Preschool Children. ↗Ding L et al.. The Individual and Combined Effects of Prenatal Micronutrient Supplementations on Neurobehavioral Developmental Disorders in Preschool Children.. Children (Basel). 2025. PMID:40426781.PMID 40426781 ↗Journal Children (Basel)Year 2025Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/40426781/
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Observational / other LOW evidence YELLOWPrenatal vitamin C and fish oil supplement use are associated with human milk microbiota composition in the Canadian CHILD Cohort Study. ↗Chehab RF et al.. Prenatal vitamin C and fish oil supplement use are associated with human milk microbiota composition in the Canadian CHILD Cohort Study.. J Nutr Sci. 2024. PMID:39345253.PMID 39345253 ↗Journal J Nutr SciYear 2024Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/39345253/
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Observational / other LOW evidence YELLOWSupplementation practices among pregnant women and those trying to conceive: a population-representative survey in Vancouver, Canada. ↗Cochrane KM et al.. Supplementation practices among pregnant women and those trying to conceive: a population-representative survey in Vancouver, Canada.. Appl Physiol Nutr Metab. 2024. PMID:39258537.PMID 39258537 ↗Journal Appl Physiol Nutr MetabYear 2024Study type Observational / otherEvidence strength LOW evidencePubMed link https://pubmed.ncbi.nlm.nih.gov/39258537/
Score Transparency
0 of 10 approved references (score saturates at 10). More peer-reviewed studies = stronger evidence base.
Method: Q = number of approved references ÷ 10 (capped at 1.0)
Limited — mostly case reports or animal studies
Method: L = mean study-level weight across approved references. Level 1 (meta-analysis / systematic review) = 1.0; Level 2 (RCT) = 0.8; Level 3 (cohort/case-control) = 0.6; Level 4 (case report) = 0.4; Level 5 (animal / in-vitro) = 0.2.
Mixed or neutral — roughly equal benefit and risk signals
Method: D = (sum of risk-scored references − sum of benefit-scored references) ÷ total evidence score, then scaled from [−1, 1] to [0, 1]. 0.0 = pure benefit; 0.5 = neutral; 1.0 = pure risk.
One or more monitoring-level safety signals active
Method: S = 0.5 (neutral baseline) + sum of active signal severity deltas ÷ 10. Severity deltas: Critical = +2.0, High = +1.5, Moderate = +1.0, Low = +0.5. Capped at 1.0.
Final GIRI Score for Prenatal Multivitamin. Risk level thresholds: Low 0–3.0 · Moderate 3.0–5.5 · High 5.5–7.5 · Critical 7.5–10.
Full methodology & data sources
The GIRI Score is computed entirely from structured data — no editorial scoring or subjective weighting is applied at any step.
- References: Only approved references are counted. Each reference is assigned an evidence level (L1–L5) and a direction (risk / neutral / benefit) by the reference manager or AI classifier.
- Safety Signals: Sourced from regulatory agencies (FDA, EMA, Health Canada, TGA, and others) and pharmacovigilance databases. Only active signals count toward the score.
- Formula version: GIRI Score v3.7.0 — Q × L × D × S × 10.
- Limitations: The score reflects published evidence and recorded signals as of the last update date. It is not a clinical risk assessment and should not replace advice from a qualified healthcare professional.
Risk Level Classification
Based on available regulatory signals and scientific evidence, this ingredient presents a low safety concern under normal conditions of use.
0–3.0
3.0–5.5
5.5–7.5
7.5–10
The score pin shows exactly where this ingredient falls on the fixed risk scale.
What drove the Low classification for Prenatal Multivitamin
A score of 2.5 places this ingredient in the Low band. Thresholds: Low 0–3.0 · Moderate 3.0–5.5 · High 5.5–7.5 · Critical 7.5–10.
0 approved references.
Limited — mostly case reports or animal studies (Level 4–5).
Neutral or mixed — benefit and risk signals roughly balanced.
No active signals — S component is at neutral baseline (0.5), contributing no extra risk weight.
No major regulatory restrictions or advisories recorded across monitored jurisdictions (FDA, EMA, Health Canada, TGA, and others).
How are the Low / Moderate / High / Critical thresholds defined?
The four risk levels are fixed score bands. A score is assigned to exactly one level based on where it falls:
| Level | Score | Meaning |
|---|---|---|
| LOW | 0.0 – 2.9 | Sparse or predominantly beneficial evidence. No active safety alerts. |
| MODERATE | 3.0 – 5.4 | Mixed signals — some risk alongside benefit. Caution at high doses or in sensitive groups. |
| HIGH | 5.5 – 7.4 | Multiple studies or regulatory alerts documenting adverse effects. Professional oversight recommended. |
| CRITICAL | 7.5 – 10 | Regulatory restrictions in one or more major jurisdictions. Serious documented harm. Avoid without specialist supervision. |
Thresholds are fixed constants (GIRI_Score_Utils::LEVEL_THRESHOLDS). They do not change per ingredient and are never subject to editorial adjustment.