Now Recruiting

Glycinate vs Threonate vs Citrate

The internet argues about magnesium forms every day. Let's get actual data.

"Everyone has an opinion. Nobody has a sample size. Until now."

We supply the magnesium. Free for all participants.

The Questions We're Settling

Three forms. Three claimed specialties. One head-to-head comparison.

Is Glycinate really the best for sleep and anxiety?
Does Threonate actually improve cognition more than the others?
Is Citrate just as good as the expensive options?
Which form do people actually feel the most?
Which one causes the least gut issues?

The Three Arms

You'll be randomly assigned to one group. We ship you an 8-week supply. Same brand quality across all arms — only the form differs.

Arm A — 50 people

Glycinate

400mg elemental Mg/day
"The sleep and relaxation form"
Arm B — 50 people

L-Threonate

144mg elemental Mg/day
(2g Magtein — standard dose)
"The brain form — crosses the blood-brain barrier"
Arm C — 50 people

Citrate

400mg elemental Mg/day
"The budget all-rounder"
Why random assignment? If everyone picks their favorite, the "I already believe in Glycinate" crowd skews the Glycinate results. Random assignment removes bias and lets us actually compare.

What We're Measuring

All measurement tools are free. We're testing functional outcomes — what you actually feel and how you actually perform.

Sleep Quality (PSQI) Validated clinical questionnaire
Time to Fall Asleep Self-reported sleep onset latency
Wearable Sleep Data Oura / Apple Watch / Whoop — optional but encouraged
N-back Test Working memory — Threonate's claimed edge
Reaction Time Processing speed
Anxiety Score (GAD-7) Validated clinical anxiety scale
Stress Level Perceived Stress Scale (PSS-4)
Muscle Cramps / Tension Frequency and severity log
GI Tolerance Which form causes the least gut issues?
"Do You Feel It?" Score Weekly 1-10 subjective benefit rating

Timeline

Week 0
Baseline surveys + cognitive tests
Weeks 1-8
Daily supplement + weekly check-in (~5 min)
Week 4
Mid-point cognitive tests
Week 8
Final surveys + cognitive tests

What You Get

💊

Free 8-Week Supply

Shipped to your door. Same quality across all arms.

📊

Your Personal Data

Sleep, cognition, and mood trends over 8 weeks.

📖

Full Published Results

See how your form compared — broken down by every metric.

👥

Community Access

Join the cohort discussion. Compare notes in real time.

Who Should Join

Good Fit

  • Adults 25-65
  • Not currently taking magnesium
  • Curious about which form to start with
  • Willing to be randomly assigned
  • Can commit to 8 weeks + weekly 5-min surveys
  • US-based (for shipping)

Not This Time

  • Already supplementing magnesium
  • Kidney disease or eGFR below 60
  • On medications that interact with Mg
  • Not willing to be randomly assigned

Cost to Participate

Free
Supplements shipped. All tests online. No bloodwork required.
All we ask is your data — weekly surveys (~5 min) and three rounds of online cognitive tests (~15 min each). That's it.