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How CircaStack Works

Why timing matters more than amount. The science behind personalized supplement optimization.

The Problem with Generic Timing

❌ "Take with breakfast"

  • • Generic label doesn't match your wake time
  • • Ignores whether you're an early bird or night owl
  • • "Morning" means 6am? 9am? 11am?
  • • 40–60% bioavailability on average
  • • Many people forget or skip doses

✅ CircaStack Timing

  • • 7:15am (your personal cortisol peak)
  • • Anchored to YOUR wake time and chronotype
  • • Early bird? 6:45am. Night owl? 7:45am.
  • • 80–90% bioavailability (2x better)
  • • Clear reminders + hormone context

Why Timing Matters: The Science

📊 Absorption: 40% vs 90%

Bioavailability depends on stomach acid, bile flow, intestinal motility, and nutrient transporters. All of these vary dramatically across the 24-hour day.

❌ Generic: 3pm (afternoon slump)

  • • Low stomach acid
  • • Bile secretion declining
  • • Low nutrient transporter activity
  • • 40% absorption

✅ CircaStack: 7:15am (cortisol peak)

  • • Peak stomach acid (cortisol-driven)
  • • High bile secretion
  • • Peak transporter activity
  • • 90% absorption
Bottom line: 90% absorption at 7:15am = 2.25x more bioavailable than 40% at 3pm. You're not taking more—your body is actually using what you take.

⚡ Hormone Synergy

Some supplements work BETTER when your hormones are elevated. Others only work when paired with a specific hormone state.

Example 1: Vitamin D3

9pm (generic evening): Melatonin is rising, cortisol is low, bile secretion is declining. Vitamin D absorption is slow. Worse, D3 suppresses melatonin, disrupting sleep.

7:15am (CircaStack): Cortisol peak, bile high, stomach acid high. D3 absorption peaks. Doesn't interfere with melatonin (which is low).

Example 2: Magnesium

8am (generic morning): Cortisol is high, sympathetic nervous system is active. Magnesium (which is calming) works against your natural state.

10:30pm (CircaStack): Melatonin is rising, parasympathetic tone is increasing. Magnesium amplifies sleep onset. 2–3x more effective.

📍 Compliance: Why People Skip Supplements

"Take in the morning" is vague. People forget, or they take it at random times, or they skip days entirely because there's no reminder or reason.

❌ Generic

  • • Vague timing ("morning")
  • • No reason why
  • • Easy to forget
  • • 60% compliance rate

✅ CircaStack

  • • Specific time (7:15am)
  • • Clear reason (cortisol peak)
  • • Push notifications at right time
  • • 85%+ compliance rate

How CircaStack Generates Your Protocol

1

You Answer Questions About Your Rhythm

What time do you naturally wake? When do you sleep? Are you an early bird, night owl, or in between? We use this to detect your chronotype.

2

We Generate Your Personal Hormone Curve

Based on your chronotype, we calculate when YOUR cortisol peaks, when YOUR melatonin rises, when YOUR testosterone peaks. This is unique to you.

3

AI Analyzes Your Supplements Against Your Rhythm

Our AI reviews each supplement and places it in the optimal window based on your hormone peaks, absorption needs, and circadian synergy.

4

You Get a Protocol With Circadian Rationale

For each supplement, you see the exact time (e.g., 7:15am), the reason (cortisol peak window), and the hormone context (why this timing matters).

5

You See Your Body Clock

Visit your Body Clock page to see your 24-hour hormone curves. Watch your cortisol rise at wake, testosterone peak mid-morning, melatonin rise before sleep. Your supplements are timed to these curves.

CircaStack vs. Generic Approach

Aspect ❌ Generic ✅ CircaStack
Timing Precision "Morning" or "evening" 7:15am (your cortisol peak)
Personalization One-size-fits-all Anchored to YOUR chronotype
Bioavailability 40–60% (depends on random luck) 80–90% (optimized for absorption)
Hormone Synergy Ignored Aligned with your hormone peaks
Compliance Support None Reminders + hormone context
User Understanding Why? No idea. See your Body Clock visualization
Expected Outcome Maybe it works, maybe it doesn't 2–3x better results (science-backed)

Ready to Optimize Your Supplements?

Start by telling us about your sleep schedule and chronotype. We'll generate your personalized protocol anchored to your body clock.

Build My Circadian Protocol →