Lab Testing & Diagnostics
TB Skin Test vs Blood Test: How Each Works and Reading Results
Quick answer: A tb skin test (the PPD or Mantoux) works by injecting a tiny amount of tuberculosis protein just…
Category: Lab Testing & Diagnostics
At-home tests, blood panels, continuous glucose monitors and diagnostics: what is worth doing, how to read results, and what to ignore.
Lab Testing & Diagnostics
Nicotine and Cotinine Testing: What It Detects and Windows
Quick answer: A nicotine test rarely measures nicotine itself. It measures cotinine, the chemical your liver makes from nicotine, because…
Lab Testing & Diagnostics
Function Health vs Your Doctor: Are DIY Labs Better Than a Checkup?
Quick answer: When comparing function health vs your doctor annual labs, the difference is scope: Function Health (and comparable proactive…
Lab Testing & Diagnostics
COVID Tests in 2026: PCR vs Rapid Antigen and When to Use Each
Quick answer: In 2026 there are two covid test types that matter for most people: a rapid antigen test (the…
Lab Testing & Diagnostics
Function Health vs Ways2Well: Which Lab Service Wins in 2026?
Quick answer: Function Health and Ways2Well both offer comprehensive blood testing, but they operate on fundamentally different models. Function Health…
Lab Testing & Diagnostics
Function Health vs Traditional Blood Work: What Standard Labs Miss
Quick answer: When weighing function health vs traditional blood work, the gap comes down to scope: traditional blood work ordered…
Lab Testing & Diagnostics
Do Physicals Include a Drug Test? When Employers Add One
Quick answer: A standard physical does not include a drug test. The question “do physicals include drug test” trips people…
Lab Testing & Diagnostics
Function Health vs SiPhox Health: Finger-Prick or Full Draw Labs?
Quick answer: Function Health and SiPhox Health sit at opposite ends of the at-home lab spectrum. Function is a venous-draw…
Lab Testing & Diagnostics
Fasting Before a Blood Test: What, How Long, and Can You Drink Water
Quick answer: A fasting blood test means you stop eating and drinking everything except plain water for 8 to 12…
Lab Testing & Diagnostics
Function Health vs Quest Diagnostics: DIY Labs or Membership?
Quick answer: Function Health and Quest Diagnostics solve different problems. Quest (including its direct-to-consumer arm, QuestHealth.com) lets you order individual…
Lab Testing & Diagnostics
How Long Do Test Results Take? Turnaround by Test Type
Quick answer: For most routine blood work, results post within 1 to 3 business days, and many basic panels (a…
Lab Testing & Diagnostics
Function Health vs Prenuvo: Blood Biomarkers or Full-Body MRI?
Quick answer: In the function health vs Prenuvo comparison, the two services are not competitors, they answer completely different questions.…