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EVIDENCE AND TRANSPARENCY

Research Center

Explore the evidence, methodology, limitations, and review principles behind MyDeficiencies. This Research Center explains how medication-related nutrient relationships are evaluated and how our educational conclusions may evolve as new evidence becomes available.

Educational information only. MyDeficiencies does not diagnose nutrient deficiencies, establish causation, recommend treatment, or replace qualified medical care.
Why This Research Center Exists

Understanding where health information comes from

People should be able to understand where health information comes from, how confidently it should be interpreted, and where uncertainty remains.

MyDeficiencies is designed to organize evidence about possible medication-related nutrient relationships in a clear and responsible way. The Research Center makes that process more transparent by explaining the sources we consider, the differences among evidence types, the limitations of available research, and the reasons an educational conclusion may change over time.

Transparency

We explain the basis, limitations, and context behind educational findings.

Proportionality

We do not present preliminary or mechanistic evidence as if it proves a clinical outcome.

Continuous Review

Research evolves. Our educational explanations should be able to evolve with it.

Methodology

How We Evaluate Evidence

No single source answers every medication-and-nutrient question. MyDeficiencies reviews multiple types of evidence and considers their relevance, consistency, limitations, and clinical context before presenting an educational relationship.

  1. 1

    Define the Research Question

    Identify the medication, nutrient, proposed relationship, and relevant clinical context.

  2. 2

    Review Authoritative Sources

    Evaluate applicable sources such as FDA-approved labeling, DailyMed, regulatory documents, clinical guidelines, systematic reviews, peer-reviewed research, and recognized reference materials.

  3. 3

    Examine the Type of Evidence

    Distinguish among randomized trials, observational studies, mechanistic studies, case reports, labeling statements, and expert guidance.

  4. 4

    Assess Consistency and Limitations

    Look for agreement, disagreement, sample limitations, confounding factors, study duration, population differences, and whether findings have been replicated.

  5. 5

    Translate the Evidence Responsibly

    Present the relationship in plain language without overstating certainty, causation, diagnosis, or treatment implications.

  6. 6

    Review and Update

    Revisit educational conclusions when meaningful new evidence, revised labeling, corrected sources, or stronger analyses become available.

Sources

Evidence Sources We Consider

FDA-Approved Prescribing Information

Contribution: Official safety, monitoring, pharmacology, and adverse-reaction information associated with approved products.

Limitation: Labels are written for regulatory and clinical use and may not address every nutrient-related research question.

DailyMed

Contribution: Current structured labeling information submitted to the FDA for marketed products.

Limitation: Labeling content varies by product and may not summarize the full scientific literature.

Systematic Reviews and Meta-Analyses

Contribution: Synthesize results across multiple studies and may provide a broader view of consistency.

Limitation: Their conclusions are limited by the quality, relevance, and comparability of the included studies.

Randomized Clinical Trials

Contribution: Can provide stronger evidence for specific outcomes under defined study conditions.

Limitation: Trials may be short, narrowly focused, or not designed to measure nutrient status.

Observational Research

Contribution: Can identify patterns in real-world populations and longer-term associations.

Limitation: Associations may be influenced by diet, illness, age, co-medications, lifestyle, or other confounding factors.

Mechanistic Research

Contribution: May explain how a medication could affect absorption, metabolism, storage, utilization, or elimination.

Limitation: A biologically plausible mechanism does not by itself prove a meaningful clinical deficiency.

Clinical Guidelines and Expert Consensus

Contribution: Provide professional interpretation and context for clinical decision-making.

Limitation: Guidelines may differ, may not address every medication-nutrient relationship, and may change over time.

Case Reports and Case Series

Contribution: May identify unusual or emerging observations that deserve further study.

Limitation: They cannot establish frequency, generalizability, or causation.

Evidence Strength

Understanding Evidence Strength

Evidence strength describes how confidently a relationship can be presented based on the available research. It does not diagnose an individual or prove that a medication caused a specific symptom or laboratory result.

Stronger Evidence

Meaning: Multiple relevant sources or higher-quality studies consistently support the relationship.

Does not mean: Every individual taking the medication will experience the same effect.

Moderate Evidence

Meaning: The relationship is supported by meaningful research, but important limitations or unanswered questions remain.

Does not mean: The evidence is definitive or universally applicable.

Emerging Evidence

Meaning: Early studies or plausible mechanisms suggest a possible relationship that requires further confirmation.

Does not mean: The relationship has been established clinically.

Conflicting Evidence

Meaning: Relevant studies or authoritative sources reach different conclusions.

Does not mean: One side should be presented as certain without acknowledging disagreement.

Insufficient Evidence

Meaning: Available information is too limited, indirect, or inconsistent to support a confident educational conclusion.

Does not mean: The relationship is impossible; it means the current evidence does not justify a stronger statement.

Scope

A Research Relationship Is Not a Diagnosis

What MyDeficiencies May Help Explain

  • Possible medication-related nutrient relationships
  • Proposed biological mechanisms
  • Relevant evidence sources
  • Areas worth discussing with a qualified healthcare professional
  • Questions that may help guide a future conversation

What MyDeficiencies Cannot Determine

  • Whether an individual has a nutrient deficiency
  • Whether a medication caused a symptom
  • Whether a medication should be stopped or changed
  • Whether a supplement should be started
  • The correct dose of any nutrient
  • Whether laboratory testing is medically necessary
  • Whether another condition better explains the finding
Individual assessment may require medical history, examination, dietary context, medication review, laboratory testing, and professional clinical judgment.
Library

Explore the Research Library

The library will continue to grow as medication coverage, nutrient reviews, methodology documentation, and educational articles are expanded.

Medication Research

  • Diabetes medicationsAvailable
  • Acid-suppressing medicationsAvailable
  • Blood-pressure medicationsAvailable
  • Lipid-lowering medicationsAvailable
  • Mental-health medicationsExpanding
  • ADHD medicationsIn Review
  • Hormonal medicationsIn Review
  • Pain medicationsExpanding
  • AntibioticsIn Review
  • Other commonly used classesComing Soon

Nutrient Research

  • B vitaminsAvailable
  • Vitamin CExpanding
  • Vitamin DAvailable
  • Vitamin KIn Review
  • MagnesiumAvailable
  • CalciumAvailable
  • IronAvailable
  • CopperExpanding
  • ZincAvailable
  • SeleniumIn Review

Research Concepts

Principles

Our Research Principles

Cite the Source

Important educational claims should be traceable to the evidence used to support them.

Distinguish Evidence Types

A proposed mechanism, observational association, labeling statement, and randomized trial should not be treated as equivalent.

Acknowledge Uncertainty

Limitations, conflicting findings, and unanswered questions should be visible rather than hidden.

Avoid Causal Overstatement

An association does not automatically prove that a medication caused a deficiency, symptom, or clinical outcome.

Review Meaningful Updates

Material new evidence should prompt reassessment of affected educational content.

Support Better Conversations

The purpose of the information is to help individuals and practitioners ask better questions, not to replace professional judgment.

Research Updates

How We Changed Our Mind

Scientific understanding is not static. New studies, revised medication labeling, corrected data, stronger analyses, or better context may change how a medication-related nutrient relationship should be explained.

MyDeficiencies will use this section to document meaningful changes to its educational conclusions so users can see what changed, why it changed, and how the current interpretation differs from the previous one.

Updating a conclusion is not a failure of the research process. It is evidence that the process is working.

No material research revisions have been published yet.

This section will document meaningful changes when new evidence alters, corrects, strengthens, weakens, narrows, or clarifies a MyDeficiencies educational conclusion. Minor copy edits and formatting changes will not be included.

Examples of changes that may appear here include:

  • • A new systematic review changes the assessed strength of evidence
  • • Updated FDA labeling adds important monitoring information
  • • A proposed mechanism is no longer supported
  • • A relationship is narrowed to a specific population or medication form
  • • Stronger evidence supports a more confident educational classification
  • • Conflicting research requires a more cautious conclusion
  • • An earlier interpretation is corrected or retired

Why Responsible Research Sometimes Changes

A strong evidence process does not protect old conclusions for the sake of consistency. It revisits them when better information becomes available.

An update may reflect stronger evidence, weaker evidence, a corrected source, revised labeling, improved methodology, or a clearer distinction between biological plausibility and demonstrated clinical outcomes.

Read How Updates Are Evaluated

Submit a Research Concern

Found a newer source, a possible citation issue, or an explanation that may require review? Submit it for consideration. Submission does not guarantee a change, but every supported concern should be reviewable.

Please do not submit personal medical emergencies, diagnoses, or individualized treatment questions through this workflow.

Submit a Research Concern
Priorities

Current Research Priorities

  • Expanding medication coverageActive
  • Improving nutrient relationship summariesOngoing
  • Reviewing combination-medication patternsOngoing
  • Strengthening citation qualityActive
  • Refining evidence classificationsOngoing
  • Clarifying proposed mechanismsOngoing
  • Expanding synthetic-vitamin and ingredient researchPlanned
  • Improving practitioner-facing explanationsActive
  • Documenting material research updatesOngoing
  • Reviewing user-submitted research concernsOngoing
FAQ

Research Questions

Source Standards

Source Standards

MyDeficiencies prioritizes sources according to relevance, authority, methodological quality, and applicability to the specific research question.

External links are provided for reference only and do not imply endorsement by the external organization. MyDeficiencies does not publish fabricated citations or unverified review dates.

Evidence Should Be Understandable

MyDeficiencies organizes complex medication-and-nutrient research into a clearer educational experience while remaining transparent about evidence strength, limitations, and uncertainty.

MyDeficiencies provides educational information only. It does not diagnose nutrient deficiencies, establish causation, recommend treatment, or replace qualified medical care.