Food additives and contaminants in infant foods: a critical review of their health risk, trends and recent developments

Overview

Soni and colleagues review the additive and contaminant landscape of the infant-food category, covering direct additives (colorants, flavoring agents, preservatives), indirect additives (bisphenols, phthalates, PFAS, perchlorate, food-packaging migrants), naturally occurring contaminants (mycotoxins, POPs, heavy metals), and the regulatory frameworks that govern them (US FDA Redbook/GRAS, EFSA scientific opinions, JECFA ADI evaluations, Codex Alimentarius, Indian FSSAI). The paper’s primary focus is food additives and packaging migrants rather than heavy metals; heavy-metal content is brief, drawing on Bair 2022 and Tchounwou 2012 as anchor citations for the FDA Closer-to-Zero program and metal toxicity respectively. The review is most useful to HMI as regulatory-landscape context for infant-food contaminant governance and for its discussion of aluminum and titanium dioxide immunological pathways in young children.

Key numbers

The paper does not report original heavy-metal occurrence measurements. The heavy-metal-relevant numbers it consolidates from the cited literature are:

• Aluminum and titanium dioxide (E171) immunological pathway (Fig. 3): the review summarizes a mechanism in which dietary aluminum complexes with tissue antigens to form neoantigens presented by APCs to B cells, while titanium dioxide alters gene expression and triggers Kupffer-cell-mediated inflammation through lipopolysaccharide-driven IL-2 and IL-8 release. No exposure thresholds or occurrence concentrations are quantified for aluminum or titanium dioxide in the review body; the discussion is mechanistic.
• Generic heavy-metal exposure framing (Regulations and challenges in formulation, p. 14): “Metals, such as mercury, lead, cadmium, and arsenic, are also potential hazards in food products. Heavy metal exposure can lead to organ damage, particularly in young children who are more susceptible to their toxic effects. Therefore, the U.S. Food and Drug Administration (FDA) has taken measures to reduce exposure to heavy metal contaminants in baby food and children’s food (Bair 2022).” The review provides no analyte-specific thresholds, occurrence data, or risk-quotient figures for lead (Pb), cadmium (Cd), inorganic arsenic (iAs), or total mercury (tHg).

Tolerable Daily Intake (TDI) values consolidated for non-metal additives and packaging migrants in Table 3 and the body text (preserved here for regulatory-landscape context, not for heavy-metals limits):

Tables 5 and 6 summarise persistent organic pollutant (POP) health hazards and physical-hazard sources; they do not provide quantitative heavy-metal occurrence values. The review references the Healthy Babies Bright Futures pattern via Bair 2022 rather than citing HBBF 2019 directly.

Methods (brief)

Narrative review. The paper does not document a systematic search strategy, inclusion/exclusion criteria, or PRISMA-style flow. The authors cite approximately 150 references spanning EFSA scientific opinions (2010-2023), JECFA evaluations, US FDA Redbook 2000 guidance, Codex Alimentarius standards, Indian FSSAI notifications, WHO factsheets, and primary toxicology and occurrence studies. No quantitative meta-analysis, no original measurements, no original speciation analysis. The review presents tables that consolidate additive functions (Table 1), direct and indirect additive health effects (Table 2), TDIs for direct and indirect additives (Table 3), additive-and-packaging health concerns (Table 4), POP health hazards (Table 5), and physical-hazard sources (Table 6). Figures 1-4 illustrate additive sources, classification, and the aluminum/TiO₂ immunological pathways. Author affiliations: CHRIST (Deemed to be) University, Bangalore, India; Netaji Subhas Open University, Durgapur, India. Funding: Centre for Research MRP-DSC 1936 (CHRIST University). Competing interests: none declared. The corresponding author is K. Alagesan Paari.

Implications

Microbiome: The review touches probiotic safety (E234 nisin, E235 natamycin), postbiotics, lactoferrin in bovine colostrum, and Cronobacter sakazakii and Bacillus cereus contamination in Korean cereal-based follow-up formula (Kim 2011), but does not address heavy-metal-microbiome interactions. Not material for WikiBiome federation.

Provenance notes

PDF retrieved during the 2026-06-09 multi-database /discover autopilot run for Teething & Snacks heavy metal contamination context. Open Access publication under Creative Commons Attribution 4.0 International License (BMC Springer Nature). DOI verified at the publisher PDF as 10.1186/s43014-024-00238-4; raw SHA-256 computed from the local PDF as 95d02d24f92e43993b1424bc67adc963cdba6acaee8500adb753174012d3966a. DOI, raw-handle, and cite-key checks against the linked reference record returned no prior match before creation.

Related evidence

• Aluminum
• Infant Formula Powder
• Infant Formula, RTF Liquid (Non-Soy)
• Baby Cereals / Grain Products, Dry (Rice-Based)
• Baby Cereals / Grain Products, Dry (Non-Rice)
• Infant And Child Foods Master
• Fruit Purees
• Teething & Snacks (Non-Rice)
• FDA Closer to Zero — Program Overview

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git.