Compare Supplements

Side-by-side comparison of 2 supplements

Caf9.5

Caffeine

Moderate safety

I9.0

Iodine

Moderate safety

Evidence

Evidence Score9.5/10

Studies: 146

Meta-analyses: 23

Evidence Score9/10

Studies: 28

Meta-analyses: 28

Outcome Grades

Boost daily energyA

A-F grade per outcome, combining overall evidence with goal-specific relevance. A = strong evidence; F = insufficient. Hover a badge for details.

Dosage & timing

Dosage:

200mg

Best Time:

Morning · with food (preferred)

Can take on empty stomach

Form:

Pill/capsule for precise dosing

Dosage:

220mcg

Best Time:

Morning · with food (preferred)

Take with food

Form:

Potassium iodide (most common and studied)

What you'll notice

👁️ Increased Alertness95%

15-45 minutes

🎯 Improved Focus85%

30-60 minutes

🏃 Better Exercise Performance80%

30-60 minutes

⚖️ Thyroid Normalization80%

4-12 weeks

⚡ Energy Improvement60%

4-8 weeks

Safety

Moderate safety

Contraindications:

Severe anxiety disorders
Uncontrolled high blood pressure
Heart arrhythmias

Drug Interactions:

Stimulant medications (Adderall, etc.)
MAO inhibitors
Certain antibiotics (Cipro)

Side Effects:

Jitteriness/anxietyInsomniaIncreased heart rate

Moderate safety

Contraindications:

Hyperthyroidism
Hashimoto's (use with extreme caution)
Dermatitis herpetiformis

Drug Interactions:

Thyroid medications
Lithium
ACE inhibitors, potassium-sparing diuretics

Side Effects:

Thyroid dysfunctionMetallic tasteAcne/skin breakout

Works well with

enhances

complementary

stacks-well

enhances

How they work together

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