Research-method reference
A plain-language guide to FDA–NIH BEST terminology, research categories, context of use, and qualification concepts. It is designed for reading research methods—not interpreting a person’s laboratory result.
Browse concepts
12 entries shown
03
concept groups
07
BEST categories
12
published entries
01
Taxonomy group
Vocabulary for defining a measurement question and its stated context.
3 entries
A defined characteristic measured as an indicator of a biological process, pathogenic process, or response in a research or development context.
Limit: This is a research-method definition. It does not make a personal result meaningful on its own.
The specific purpose, population, measurement approach, and decision setting for which a research or regulatory tool is being described.
Limit: A term does not carry over automatically to a different population, assay, question, or setting.
A regulatory-science process used to support a tool for a stated context of use in drug development.
Limit: Qualification is not a general endorsement of every test, result, laboratory, product, or health claim.
02
Taxonomy group
FDA–NIH BEST categories describe research roles, not a personal result or decision.
7 entries
A BEST category used to indicate potential for developing a condition or medical event in a defined research context.
Limit: This category does not estimate an individual’s risk on this page.
A BEST category intended to detect or confirm the presence of a disease or condition in a stated context.
Limit: This atlas does not diagnose or interpret any visitor’s test result.
A BEST category measured serially to assess the status of a disease, condition, or exposure in a defined context.
Limit: This does not create a personal monitoring schedule or recommend repeat testing.
A BEST category used to identify the likelihood of a clinical event, disease recurrence, or progression in a defined population.
Limit: A published category is not an individual forecast.
A BEST category used to identify individuals more likely than similar individuals without that characteristic to experience a favorable or unfavorable effect from a medical product or exposure.
Limit: This is not treatment selection or a recommendation for an individual.
A BEST category used to show that a biological response has occurred in an individual after exposure to a medical product or environmental agent.
Limit: The category does not establish clinical benefit, safety, quality, or product suitability.
A BEST category measured before or after exposure to indicate the presence or extent of toxicity or an adverse response in a defined context.
Limit: This page does not assess toxicity, safety, or adverse effects for a person or product.
03
Taxonomy group
Terms for evaluating a measurement approach within a specified research setting.
2 entries
A measurement-method concept concerned with whether an assay or procedure can reliably measure what it is intended to measure under specified conditions.
Limit: Peptide Index does not validate assays, laboratories, certificates, batches, or products.
An evidence question about whether a measurement is associated with a clinical state or outcome within a defined context.
Limit: Association in a study does not create a universal diagnostic, treatment, or outcome claim.
Source context
FDA describes biomarker qualification as tied to a stated context of use. The FDA–NIH BEST resource supplies shared terminology for research, product development, and regulatory discussions. Peptide Index uses these sources for vocabulary and limits, not to qualify an individual test or create a medical decision tool.
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