L-Arginine

Amino acid 🟡 Moderate

An amino acid and nitric-oxide precursor studied for blood flow.

⚠ Herpes/BP medsSee cautions below; consult your physician for specifics.

Reviewed by Dr. Sungwoong Jung · Last reviewed Jul 16, 2026

Key benefits

NO → vasodilation

Performance studies (mixed)

Blood-pressure research

How it works

Evidence

🟡 Moderate / mixedConditional, inconsistent results

The same nutrient can differ for "correcting deficiency" vs "general prevention."

Suggested use

Often fasting/pre-workout.

A general suggestion, not a prescription.

Cautions & interactions

May worsen herpes; caution with BP meds → consult physician.

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Korea vs USA

🇰🇷 Korea

sports/circulation

🇺🇸 USA

pre-workout/NO

References

NIH — L-Arginine (overview) ↗

Grades/refs re-verified at each update (draft).

Omega-3 Omega-3 Essential fatty acids that lower triglycerides and support anti-inflammation, brain, and retina. 🟡 Moderate Heart·Metabolic Coenzyme Q10 Coenzyme Q10 A fat-soluble compound involved in cellular energy production and antioxidant defense. 🟡 Moderate Energy·Cell

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🇰🇷 Buy in Korea 🇺🇸 Buy in USA

Disclaimer — This content is for general information and suggestion only and does not replace medical diagnosis or treatment. Consult a doctor or pharmacist if you have a condition or take medication.