Nutrient status tools
Environment- and symptom-based estimators for nutrient status — no lab order required. Free, no account needed.
UVB Vitamin D Synthesis Calculator
Estimate how much midday sun your skin type needs for vitamin D synthesis at today's UV index.
Copper/Zinc Ratio Calculator
Copper ÷ zinc from two serum values — the balance functional medicine practitioners read as one number.
Transferrin Saturation Calculator (TSAT)
TSAT from serum iron + TIBC — iron status percentage with reference bands and ferritin pairing guidance.
Omega-3 Index Calculator (with Omega-6:3 Ratio)
Calculate your omega-3 index from EPA + DHA on a fatty acid panel, plus your omega-6:3 ratio — with research-convention bands.
Numbers are a start — symptoms tell the fuller story.
Our free 3-minute health assessment maps your symptoms to possible root cause patterns and sends you a personalized AI report.
Take the free health assessment →These tools are part of the Brevlix patient acquisition system
Free calculators and assessments attract patients who are already researching their symptoms. Brevlix turns that same pattern into a system for your practice: an AI health assessment on your website that screens patients, captures their details, and sends them a personalized report — before the first appointment.
Patients come to you pre-informed
Every assessment produces a structured archetype report — you see the patient's symptom patterns before you meet them.
Your branding, your website
Embed with one script tag. Colors, logo, and booking link are yours — patients never leave your site.
Live in 5 minutes
13 pre-built clinical assessments. Pick a topic, customize, embed. No per-assessment fees.