Question 1

What is Lysine?

Accepted Answer

L-lysine is an essential amino acid (must be obtained from diet). Supplements are commonly marketed for cold sores (herpes simplex) and general protein/nutrition support; evidence for cold sore prevention/treatment is mixed across studies.

Question 2

What are the common uses of Lysine?

Accepted Answer

Lysine is commonly used for Dietary amino acid supplementation, Often marketed for herpes simplex (cold sores) support (evidence mixed).

Question 3

How does Lysine work?

Accepted Answer

Lysine is required for protein synthesis and collagen formation. For HSV, a proposed mechanism involves lysine/arginine balance affecting viral replication, but clinical outcomes vary across trials.

Question 4

What are the side effects of Lysine?

Accepted Answer

Common side effects of Lysine may include GI upset at higher supplemental intakes (e.g., cramps, diarrhea). Always consult with a healthcare professional before starting any supplement.

Question 5

Are there any warnings or precautions for Lysine?

Accepted Answer

No RDA is set specifically for lysine in the way vitamins/minerals have RDAs. People with rare metabolic conditions (e.g., lysinuric protein intolerance) should avoid lysine supplements unless medically directed. Additional precautions may apply.

Question 6

Is Lysine FDA approved?

Accepted Answer

Dietary supplement in the U.S.; not FDA-approved for disease treatment. Published safety assessments report generally good tolerance in studied amounts, with GI effects being the most common limitation.

Question 7

Where can I buy Lysine?

Accepted Answer

Over-the-counter.

Lysine

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