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Natural Factors180 count • 90 servingsAvailable now$13.20$0.15 / serving4.8 · 1,773 ratings
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Retailer links may be affiliate links. Rankings and placement are not paid placement.
DoseRank is not medical advice. Review pregnancy, breastfeeding, medication interactions, allergies, and health-condition concerns with a qualified clinician before using this supplement. Stop use and report concerning adverse events to a clinician, the product maker, or the retailer.
Price history · last 10 crawls
Rating quality and social-proof history · last 10 crawls
“Customers generally find Natural Factors L-Lysine to be a high-quality supplement with pure ingredients. Many users report benefits such as improved immune system support, better skin health, and reduced severity of cold sores. The capsules are easy to swallow and have no unpleasant smell or taste for most users, although one customer noted a plastic-like odor in their bottle. The product is appreciated for its natural origins and effectiveness in balancing arginine levels. Some customers caution against mixing it with L-Arginine due to potential neutralization effects. While the majority of reviews are positive, one user discarded the product due to the presence of magnesium stearate, a flow agent they prefer to avoid. Overall, the supplement is well-received for its efficacy and quality.”
Helps digestion
Boost immune
Easy to swallow
Reduce activity
Muscle tissue
Good nutrient
Fastest works
Very happy
Safe use
Not convenient