Compare Supplements

Side-by-side comparison of 2 supplements

🧠

Acetyl-L-Carnitine

Acetyl-L-Carnitine (ALCAR)

9/10 evidencehigh safety

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☕

Caffeine

Caffeine (1,3,7-Trimethylxanthine)

9.5/10 evidencemoderate safety

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Evidence

Evidence Score

9/10

Studies: 40+

Meta-analyses: 30

Avg Quality: 9.1/10

Evidence Score

Best9.5/10

Studies: 40+

Meta-analyses: 26

Avg Quality: 8.8/10

Dosage & Timing

Dosage:

500-2000mg

Best Time:

Morning or early afternoon, With or without food

Can take on empty stomach

Form:

ALCAR powder or capsules

Dosage:

100-200mg

Best Time:

Morning, 30-60 minutes before exercise

Can take on empty stomach

Form:

Pill/capsule for precise dosing

What You'll Notice

💡 Mental Clarity65%

1-4 weeks

🧠 Improved Memory55%

4-12 weeks

😊 Mood Support50%

2-4 weeks

👁️ Increased Alertness95%

15-45 minutes

🎯 Improved Focus85%

30-60 minutes

🏃 Better Exercise Performance80%

30-60 minutes

Safety

high safety ratingBest

Contraindications:

Seizure disorders (may lower seizure threshold)
Hypothyroidism (may affect thyroid hormone)

Drug Interactions:

Thyroid medications
Blood thinners
Anticonvulsants

Side Effects:

GI upsetRestlessness/insomniaFishy body odor (high doses)

moderate safety rating

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

Works Well With

Alpha-GPCenhances

Alpha Lipoic Acidcomplementary

CoQ10complementary

L-Theanineenhances

Creatinecomplementary

Alpha-GPCstacks-well

Compare Supplements

Acetyl-L-Carnitine

Caffeine

Evidence

Dosage & Timing

What You'll Notice

Safety

Works Well With

Categories

Compare Supplements

Acetyl-L-Carnitine

Caffeine

Evidence

Dosage & Timing

What You'll Notice

Safety

Works Well With

Categories