Is Source Naturals L-Lysine 1,000 mg safe while breastfeeding?

Grade A. 6 Safe, 0 Caution, 0 Avoid. No major safety flags.

Clarity Product Analysis

Source Naturals

L-Lysine 1,000 mg

Name: L-Lysine 1,000 mg
Brand: Source Naturals

All clear6 of 7 ingredients checked · 0 flagged · 6 clear

No safety flags identified

6Checked

AGrade

6Safe

0Flagged

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This product passed Clarity screening with minimal or no flags.

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Full ingredient analysis

Ingredient	Status	Evidence	Notes
Calories	Not in DB
Colloidal Silicon Dioxide	Safe	Gold	Histamine: N/A
L-Lysine Hydrochloride	Safe	Gold
Magnesium Stearate	Safe	Gold	Safe for breastfeeding.. DAO: Low
Modified Cellulose Gum	Safe	Silver	Safe. Plant fiber used as filler. FDA GRAS. Not absorbed.
Sorbitol	Safe	Gold	Safe for lactation.. DAO: Low
Stearic Acid	Safe	Bronze	Natural fatty acid.. Histamine: N/A

See all 7 ingredients analyzed. Free, instant access.

According to the Clarity Ingredient Safety Database by Health AI. 6 of 7 ingredients verified against 1,595 evidence-graded entries. Last verified: April 2026. Database version 4.2. Check this product live →

What this means

All checked ingredients in this product are rated Safe.

Check any ingredient yourself.

1,595 ingredients. 20+ safety dimensions. Evidence-graded.

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Product analysis by Clarity (Health AI). Based on published evidence for breastfeeding, pregnancy, and general safety. Not medical advice. Formulations may change; verify current ingredients on the label.

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