The only PK tracker that covers your entire protocol in one place. Prescriptions, supplements, peptides, hormones, nootropics. Every compound in your stack, plotted against its own therapeutic range. No account. No cloud. Your data never leaves your phone.
Also available as a native app. Free, no account needed.
Med trackers refuse AAS. Cycle trackers refuse nootropics. Serum covers prescriptions, peptides, AAS, psychedelics, and everything in between.
400+ interactions auto-flagged: absorption blockers, dangerous combos, and nutrient depletions you'd never spot manually.
No account. No cloud. No analytics. What you take never leaves your phone, and there's no server that could leak it if we wanted to.
800+ studies behind the model. Every drug cites peer-reviewed sources with plain-language summaries.
Pick from 300+ supplements and medications, or add your own compound with custom half-life data.
One tap records a dose. Bundle a whole morning stack together and track every ingredient at once.
Real-time curves model absorption, metabolism, and elimination, so you always know what's actually in your system.
Shift timing, dose, and frequency until your levels hit the sweet spot. Reminders keep you consistent.
Swipe through the dashboard, dose log, compound library, withdrawal projection, and stack analytics.
Most trackers count pills. Serum models what actually happens after you swallow them, so you can tell whether your protocol is doing anything at all.
First-order absorption via the Bateman equation with calibrated absorption rates, elimination rates, and oral bioavailability for each drug. Buspirone at 4%, curcumin at 5%, propranolol at 25%.
Drugs like fluoxetine, codeine, and amitriptyline produce active metabolites. Serum models the full parent-to-metabolite conversion cascade with independent half-lives.
Testosterone esters, lisdexamfetamine, simvastatin. Prodrugs are modeled with their conversion mechanics, not just the active form.
See where your levels are heading with regular dosing. Tracks time to steady state, peak, and trough. Multiple sources (standalone + bundles) are combined.
Configure loading phases, custom frequencies, on/off cycling, and as-needed PRN dosing. Projections adjust accordingly.
Track a multivitamin as one dose, and each ingredient gets its own curve. Overlap detection flags when the same compound comes from multiple sources.
Serum is fully offline. No accounts, no cloud sync, no analytics, no telemetry. Your regimen, dose history, and settings are stored on your device and are never transmitted anywhere.
Optional Health Connect (Android) and Apple Health (iOS) integration syncs dose logs to your health platform when you enable it.
Free and works right in your browser. For notifications and health platform sync, install the native app.
Open Web App Install Native