Credential transparency: Dr. Frederick is a contributing analyst and writer, not a treating physician or laboratory director for this site. Articles are researched and written to the same source and review standard described in our editorial policy, and do not constitute medical, legal, or workplace-policy advice.
Focus areas
Dr. Frederick writes longer-form articles that sit alongside the site's calculators and reference guides, connecting the underlying biochemistry and diagnostic-accuracy research to how EtG results are actually used—in monitoring programs, laboratories, and everyday questions about detection windows.
Published articles
Editorial oversight
Blog articles are reviewed against the same source-hierarchy and correction process used across EtG Calculator Pro. See the editorial team profile for the organization-level review process, or the corrections page to report an issue with a published article.