Publications

Published research

Journal articles, white papers, conference presentations, roundtable papers, condition pages, and structured databases spanning microbiome medicine, microbial metallomics, food metallomics, heavy metal certification, and ketogenic diet research.

ORCID: 0000-0002-2348-7259 ↗·22 publications·14 with DOIs

2026

Journal Article

The Counterproductive Consequences of Public Exposé Testing: How Unstructured Disclosure Undermines Heavy Metal Contamination Reduction

Pendergrass, K.. Journal of Food Metallomics.

Argues that unstructured public exposé testing of consumer products for heavy metals is systematically counterproductive. Drawing on compliance theory, game theory, chilling-effects research, and regulatory science, demonstrates that public gotcha testing suppresses industry transparency, impedes data sharing, concentrates reputational damage on brands that may be the cleanest in their category, and provides litigation scaffolding while failing to address upstream supply chain contamination.

doi:10.5281/zenodo.19470572 ↗

Journal Article

Certification as a Framework for Reducing Heavy Metal Exposure in Infant and Child Foods: Integrating Legal Defensibility, Scientific Rigor, and Commercial Viability

Pendergrass, K.. Zenodo.

Framework for third-party heavy metal certification in infant and child foods, integrating ALARA principles, legal defensibility under Proposition 65 and FDA Closer to Zero, and commercial viability for food manufacturers.

doi:10.5281/zenodo.18905821 ↗

White Paper

The Cost of Operating Without Credible Third-Party Heavy-Metal Certification

Pendergrass, K.. Journal of Food Metallomics.

Analysis of the economic, regulatory, and reputational costs facing food companies that lack credible third-party heavy metal testing. Covers Proposition 65 litigation, MDL 3101, NSF/ANSI 173, recall economics, and California AB 899.

doi:10.5281/zenodo.18903738 ↗

Journal Article

Heavy Metals in Fertilizers: A Historical Analysis of Contamination Trends (1960–2025)

Pendergrass, K.. Zenodo.

Historical analysis tracing heavy metal contamination in nitrogenous and phosphatic fertilizers from 1960 to 2025. Examines nickel, cadmium, and lead accumulation in agricultural soils and the implications for food safety and environmental remediation.

doi:10.5281/zenodo.18439158 ↗

Journal Article

Heavy Metals, Microbial Metallomics, and the US Obesity Epidemic: A Mechanistic Examination of a Population-Level Metabolic Disruption

Pendergrass, K.. Zenodo.

Proposes that the US obesity epidemic traces to heavy metal contamination from agricultural fertilizers driving metabolic disruption through microbial metallomics pathways, affecting all species in proximity to the modern food system including lab rats and pets.

doi:10.5281/zenodo.18434951 ↗

Journal Article

Age-Window Metabolic and Toxicokinetic Vulnerability in Vegetable-Based Baby Foods: Separating Developmental Readiness from Toxicant Susceptibility

Pendergrass, K.. Zenodo.

Examines age-specific metabolic and toxicokinetic vulnerabilities in infants consuming vegetable-based baby foods, distinguishing developmental readiness for solid food introduction from susceptibility to heavy metal toxicants.

doi:10.5281/zenodo.18366816 ↗

Journal Article

Nickel as a Catalytic Driver of Necrotizing Enterocolitis: Dietary Nickel, Microbial Metallomics, and the Activation of Nickel-Dependent Virulence Pathways in the Preterm Gut

Pendergrass, K.. Zenodo.

Proposes dietary nickel as a catalytic driver of necrotizing enterocolitis in preterm infants through activation of nickel-dependent virulence factors (urease, [NiFe]-hydrogenase, glyoxalase I) in pathogenic Escherichia coli, framed through nutritional immunity and microbial metallomics.

doi:10.5281/zenodo.18200348 ↗

2025

Editorial

From Dysbiosis to Dyshomeostasis: Why Parkinson’s Requires a Metallomic–Microbiome Lens

Pendergrass, K.. Microbiome Medicine Journal, Volume I, Issue I.

Editorial premise advancing a metallomic–microbiome framework in which metal dyshomeostasis, particularly iron mismanagement, initiates neuronal vulnerability and selects for pathogenic microbial ecologies in Parkinson’s disease.

doi:10.5281/zenodo.18068369 ↗

Journal Article

Microbial Metallomics and Parkinson’s Disease: A Unified Metal-Driven Framework Linking Ferroptosis, Dysbiosis, and α-Synuclein Pathology

Pendergrass, K.. Microbiome Medicine Journal, Volume I, Issue I.

Unifying framework positioning heavy metal dyshomeostasis as the initiating event connecting ferroptosis, microbial virulence, neuroinflammation, and α-synuclein pathology in Parkinson’s disease.

doi:10.5281/zenodo.17830082 ↗

Roundtable Paper

Pheomelanin, Eumelanin, and Neuromelanin: A Metal-Linked Hypothesis for Parkinson’s Risk in Redheads

Eyer, K., Pendergrass, K.. Microbiome Medicine Roundtable, Volume I, Issue I.

Novel hypothesis proposing that MC1R loss-of-function variants alter neuromelanin composition toward pheomelanin dominance, reducing iron sequestration capacity and increasing ferroptosis susceptibility in dopaminergic neurons.

doi:10.5281/zenodo.17976306 ↗

Roundtable Paper

Melanotan Peptides as Potential Therapeutics in Parkinson’s Disease

Pendergrass, K., Eyer, K.. Microbiome Medicine Roundtable, Volume I, Issue I.

Evaluates MC1R agonism (melanotan I/afamelanotide and melanotan II) as a metallomics-informed therapeutic strategy for Parkinson’s disease, proposing that MC1R activation biases pigment chemistry toward eumelanin and reduces iron-driven ferroptosis.

doi:10.5281/zenodo.17996461 ↗

Journal Article

The Microbiome Medicine Roundtable Method: From Mechanism to Testable Intervention

Pendergrass, K.. Microbiome Medicine Journal, Volume I, Issue I.

Formal description of the Microbiome Medicine Roundtable as a structured, mechanism-first synthesis method for converting fragmented biomedical observations into coherent disease models and translational hypotheses.

doi:10.5281/zenodo.18069485 ↗

Journal Article

Itraconazole and Lactoferrin for FIP-Associated Gingivitis in Cats: A Perspective

Pendergrass, K.. Zenodo.

Proposes itraconazole and lactoferrin as a combined intervention for FIP-associated gingivitis in cats, addressing polymicrobial biofilms involving Porphyromonas gingivalis and Candida albicans through drug repurposing, nutritional immunity, and microbial metallomics.

doi:10.5281/zenodo.18085985 ↗

Database / Condition Page

Microbiome Signature of Endometriosis

Pendergrass, K., Aristotelous, G., Aleru, D., Eyer, K.. Microbiome Medicine.

Comprehensive condition page formalizing the microbiome signature of endometriosis with Major Microbial Associations, validated and promising interventions (HBOT, low-nickel diet, metronidazole), and STOP recommendations.

View ↗

Database / Condition Page

The Microbiome Signature of Chronic Kidney Disease (CKD)

Pendergrass, K.. Microbiome Medicine.

Condition page documenting the microbiome signature of chronic kidney disease, including differentially abundant taxa, intervention candidates, and the role of site-specific prebiotic fibers in CKD management.

View ↗

Conference Presentation

The Microbiome Signature of Endometriosis: From Dysbiosis to Metallomics to Targeted Interventions

Pendergrass, K.. 11th Beneficial Microbes Conference, Amsterdam.

Live demonstration of the Microbiome Signature Triangulation Method applied to endometriosis before an audience of 150 researchers. Included metallomic signature analysis, microbial functional profiling, and a STOP analysis challenging routine iron and zinc supplementation.

2021

Journal Article

Methods for Quantifying Net Carbohydrates in Food Products: A Critical Analysis of Glycemic Index-Based Keto Claims

Pendergrass, K.. Zenodo.

Critical analysis of methods for quantifying net carbohydrates in food products, evaluating the validity of glycemic index-based keto claims using HPAEC-PAD analytical chemistry and carbohydrate quantification methods.

doi:10.5281/zenodo.18428893 ↗

Journal Article

High Variability in Glycemic Index Values Leads to Low Clinical and Practical Utility

Pendergrass, K.. Evidence-Based Keto Diet Research.

Demonstrates that high variability in published glycemic index values undermines their clinical and practical utility for ketogenic diet certification and consumer guidance.

2020

Journal Article

A Review of Net Carbohydrates and Their Quantification

Pendergrass, K.. Ketogenic Diet Research.

Comprehensive review of net carbohydrate definitions, quantification methods, and regulatory implications for ketogenic diet product certification.

Journal Article

Ketogenic Diet Randomized Controlled Trials (RCTs): Systematic Review

Pendergrass, K.. Ketogenic Diet Research.

Systematic review of randomized controlled trials evaluating the ketogenic diet, conducted to establish the evidence base for keto certification standards at the Paleo Foundation.

2019

Journal Article

Beyond 'Just Eat Real Food': The Case for Prebiotic Fiber and Hydrocolloid Fortification in Modern Diets

Pendergrass, K.. Microbiome Diet Research, The Paleo Foundation.

Research paper with 81 references arguing that achieving recommended prebiotic fiber intake through whole foods alone is impractical, and that hydrocolloid-fortified packaged foods offer a viable, evidence-based solution. Documented the nephroprotective, bifidogenic, and anti-diabetic properties of gum arabic, resistant maltodextrin, and other high-MW prebiotic fibers.

Journal Article

Absorption, Metabolism, Excretion, and Health Outcomes of Various Sugar Alcohols

Pendergrass, K.. Ketogenic Diet Research.

Review of the absorption, metabolism, excretion pathways, and health outcomes of sugar alcohols used in ketogenic and low-carbohydrate food products, conducted to inform certification standards.

Databases & standards

Microbiome Signatures Database

Clinician-facing database formalizing disease-associated microbiome patterns through Major Microbial Associations (MMAs). Condition pages include validated interventions, promising candidates, STOP recommendations, and research gaps for endometriosis, Parkinson’s disease, chronic kidney disease, and additional conditions in development.

microbiomemedicine.com ↗

Heavy Metal Tested & Certified (HMTc) Standards Library

Eight per-metal standards documents (Pb, As, Hg, Cd, Cr, Ni, Sn, Al) with category-specific contaminant limits, ALARA-based principles, lot testing schedules, governance policies, and anti-circumvention language for food, supplements, cosmetics, and consumer products.

heavymetaltested.com ↗

Research frameworks

For detailed descriptions of the methodologies behind this research, including the Microbiome Signature Triangulation Method, MBTI Validation Criteria, Microbial Metallomics, Major Microbial Associations, STOP recommendations, and HMTc certification standards, see the dedicated frameworks section.

View all frameworks