Every supplement interacts with every other one. Some compete for the same absorption pathway. Some enhance each other. Most people guess at the details. We show you exactly what's happening in your protocol and what you might be missing.
Your protocol is a system. Each supplement affects the others. We break down that system and show you exactly how it works.
Zinc and copper share the same transporter. Take them together and each one absorbs less. We flag these interactions with the mechanism behind them, not vague cautions. We also tell you how to space them. A four-hour gap solves most competition problems.
Fat-soluble vitamins belong with food. Iron needs an empty stomach. Magnesium works best before bed. We build you a complete daily schedule. Morning and evening slots, with the reason for each.
Multivitamins overlap with standalone supplements. We find those overlaps and tell you whether the combined dose matters for your goals. Sometimes you can simplify. Sometimes the redundancy is worth keeping.
Based on your health goals, we look at what your protocol might be missing. Practical food sources come first. A supplement suggestion comes second, with the specific form and dose range that makes sense for you.
Beyond gaps, we show you evidence-backed compounds that would strengthen your protocol for your stated goals. Four to six options, ranked by how well they fit with what you're already taking.
If you've already explored food sources in Vernal Nourish, Stack connects the dots. We show you whether those foods actually hit your therapeutic dose, what timeline that means, and when supplementation would accelerate things.
Food sources you researched
You researched magnesium in Nourish. Found pumpkin seeds, dark chocolate, leafy greens. We run the numbers: eating those foods consistently gives you 200 to 300 milligrams daily. Your goal is 400. Here's the honest assessment. Food sources are your baseline. Supplementation bridges the gap. Timeline matters too. Food alone takes weeks; supplementation accelerates things to 2 to 3 weeks.
This is unique to Vernal. Other tools can't see your Nourish research. Stack does.
From a real analysis
A single analysis gives you a complete report of what's happening in your protocol. Annual access turns that into a living system with recommendations shaped by your sub-goals and updated as your protocol changes.
Sub-goal precision
Your sleep goal includes both “falling asleep faster” and “staying asleep longer”. Those are different problems. A Protocol Consideration for your specific sub-goal shows you which one fits your protocol better, given what you're already taking.
Protocol-aware suggestions
You're already taking zinc for immune support. A Protocol Consideration evaluates your current protocol and surfaces options that complement it, avoiding redundancy. Each recommendation is selected in context, not in isolation.
Unlimited re-analyses
When your protocol changes, you re-analyze. Annual passes include unlimited re-analyses. Single Analysis users pay $9 per re-analysis. Annual passes pay for themselves after four protocol changes.
Annual Pass
Your personal supplement journal
Log reactions, side effects, and what works. Everything is remembered. When you ask “Can I take these three together?” we reference your actual experience. If you had a headache with magnesium and iron last week, we remind you and suggest safer timing.
Supplement Journal
3 entries
May 9, 2026
ModerateMagnesium 400mg + Iron 18mg
Reaction: Headache
Took both together with lunch
May 7, 2026
NoneMagnesium 400mg
Reaction: No reaction
Taken alone, evening
May 3, 2026
MildIron 18mg
Reaction: Mild nausea
Taken on empty stomach
Stack Chat
Annual Pass
Can I take magnesium and iron together?
Your journal shows a headache after taking both on May 9. Try separating them by at least 2 hours — iron with breakfast, magnesium in the evening. That gap eliminates the absorption competition and may resolve the headache.
Annual Pass
Your supplement chat
Ask questions anytime. About timing, interactions, or what happened when you tried a combination. It remembers your journal, your goals, and your protocol. You get advice based on your actual experience, not generic information. Your personal supplement advisor, always available.
Annual subscribers get a health dashboard. Every analysis you run saves to it. Every re-analysis updates it. You're building a history of your protocol decisions over time.
Your protocol lives in your dashboard. No cabinet rebuilding. Your latest analysis is one click away, ready to adjust and re-analyze whenever you want.
Vernal Stack
|Your Dashboard
3 analyses · last updated May 14, 2026
May 14, 2026
Boron · Vitamin D3 · Thiamine
Mental clarity · Nerve and neuropathic pain
March 2, 2026
Magnesium Citrate · Omega-3 · Lion's Mane
Sleep quality · Mental clarity and focus
January 15, 2026
Vitamin D3 · K2 · Zinc
Immune support · Bone and joint health
One-time analysis or unlimited access. Both save your reports forever. Choose based on how often you expect to adjust your protocol.
Single Analysis
$15
One-time purchase
Re-analyze for $9 when your protocol changes.
Annual Pass
$39
Per year
Build your cabinet, add your supplements, and get your analysis. It takes about five minutes.
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