Compare Supplements

Side-by-side comparison of 2 supplements

Caf9.5

Caffeine

Moderate safety

Gl7.5

Glycerol

High safety

Evidence

Evidence Score9.5/10

Studies: 146

Meta-analyses: 23

Evidence Score7.5/10

Studies: 12

Meta-analyses: 24

Outcome Grades

Improve enduranceA

Athletic performanceA

Speed up recoveryC

Improve enduranceB

Athletic performanceC

Speed up recoveryC

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:

1.2g/kg

Best Time:

Any time · with food (preferred)

Can take on empty stomach

Form:

Glycerol powder (65% concentration typical)

What you'll notice

👁️ Increased Alertness95%

15-45 minutes

🎯 Improved Focus85%

30-60 minutes

🏃 Better Exercise Performance80%

30-60 minutes

🏃 Extended Endurance70%

During exercise (1-3 hours post-ingestion)

🌡️ Better Heat Performance75%

During exercise in heat

❤️ Lower Heart Rate60%

During exercise

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

High safety

Contraindications:

Kidney disease
Diabetes (may affect blood sugar)
Heart failure (fluid retention)

Drug Interactions:

Diuretics
Diabetes medications

Side Effects:

BloatingHeadacheNausea

Works well with

enhances

complementary

stacks-well

complementary

How they work together

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