At-Home Blood + Diet Test
See What Your Tracker Can't Show You
You track weight, sleep, activity, and calories. OneTest shows you what's happening inside — inflammation, metabolic health, and how your whole diet works together, not just isolated nutrients. The holistic picture, not fragmented data.
Know Which Foods May Be Affecting You
Inflammation can build quietly
Chronic low-grade inflammation can build with no obvious warning signs. It can show up as things you've probably chalked up to "just getting older" or "just how I feel lately":
A number on a scale or a fitness tracker on your wrist can't tell you which of these is happening — or why.
On a GLP-1?
Track More Than Weight Loss
GLP-1 medications can be effective for weight loss — but appetite suppression can quietly lower diet quality, and weight loss alone doesn't show whether it's coming from fat or muscle loss. OneTest tracks three things the scale can't:
- Inflammation and metabolic health
- Diet quality (HEI/DII®)
- Protein and nutritional status — a signal for muscle preservation
From Vague to Specific
Personalized Program. Measurable Results
Every recommendation is backed by a number — from your blood biomarkers, your DII score, or both.
"Eat less processed food."
DII score +4.2 — swap packaged snacks for walnuts and berries.
"Try to reduce inflammation."
hs-CRP 4.8 mg/L — add omega-3-rich fish twice a week, recheck in 90 days.
"Try to eat healthier."
DII −1.5, LDL trending high — add olive oil and leafy greens, cut saturated fat at dinner.
A Holistic Approach
See what is happening — and why
OneTest combines two validated assessments so you see the full picture, not fragmented data.
A specially developed panel gives you objective insight into your inflammation and metabolic health, from a simple at-home finger-prick sample.
The validated Dietary Inflammatory Index (DII®) analyzes your overall dietary pattern — not just calories or isolated nutrients — to show how your diet may be influencing inflammation.
Isolated nutrient tracking can't see how foods interact with each other. DII scores everything together, so you see the real inflammatory impact of your diet as a whole — the holistic picture, not fragmented data.
The Science
Built on two decades of published, peer-reviewed research.
Developed at the University of South Carolina, the DII connects real blood biomarker response to dietary pattern. Physician telemedicine support is available behind every result.
Dietary intervention effects are detectable within 3-month periods. Large population studies have found lower DII scores associated with lower relative all-cause mortality risk — directionally supporting the value of shifting pattern toward anti-inflammatory. Individual results vary.
How It Works
From kit to results in four steps
Affordable, Built for the Long Term
Two easy ways to order
Subscribing works out to $156/year for 4 tests, versus $756 buying four one-time kits — while giving you the exact quarterly rhythm that makes progress visible.
See What You'll Get
Sample reports, before you order
Your inflammation and metabolic markers, explained in plain language with reference ranges.
See Sample ReportYour quarterly re-test results, tracked side by side.
See Sample ReportFAQ
Common questions
Is this a diagnostic test?+
No. OneTest for Longevity is intended for educational and wellness purposes and is not a substitute for medical advice, diagnosis, or treatment.
Do I need a doctor to order it?+
No. You can order directly. Telemedicine physician support is available behind every result if you have questions or need clinical guidance.
What if my results are abnormal?+
Your report flags any values outside the typical range, and physician telemedicine support is available to help you understand what they mean and what next steps make sense.
Can I use this while on a GLP-1?+
Yes — it's a growing use case. GLP-1 therapy drives weight loss, but the scale can't show whether that loss is coming from fat or lean muscle, or whether appetite suppression is quietly lowering diet quality. Tracking inflammation, dietary pattern (HEI/DII), and albumin (a protein/nutritional status marker) each cycle gives you signals beyond weight.
How is this different from a regular blood panel or a calorie/macro tracker?+
Most trackers look at single numbers in isolation — calories, one nutrient, one lab value. OneTest combines validated blood biomarkers with a whole-diet inflammatory pattern score, so you see how everything works together instead of fragmented data points.
Can I cancel my subscription anytime?+
Yes, you can cancel your subscription at any time from your account.