Jarrow Formulas L-Lysine helps support immune health and collagen formation, turning it into a dependable amino acid supplement backed by stringent quality standards. Capsules deliver L-Lysine HCl to aid protein synthesis and tissue repair, helping daily recovery and resilience. Built on a history of clear, transparent ingredients, the brand prioritises customer safety and product integrity.

Available Sizes & Variants:

100 capsules – convenient daily dose for steady lysine intake.

Benefits & Features:

• Helps immune health and tissue repair day by day.
• Allows collagen production and enhanced calcium absorption, contributing to stronger bones and healthier connective tissue, while also supporting immune function and ongoing tissue repair too.
• Regular use helps protein synthesis and tissue maintenance during busy days.
• The active ingredient L-Lysine HCl ensures reliable absorption and predictable results for everyday needs.
• Manufactured with simple ingredients in a quality‑focused facility to support consistent lysine intake.

Jarrow Formulas has built a reputation for clear, transparent ingredient sourcing and strict quality controls, delivering L-Lysine in a simple, single-ingredient capsule. The key ingredient supports collagen production and calcium absorption, aiding skin, joints and bone health while supporting immune function. This straightforward lysine supplement fits neatly into daily routines, whether you’re adding it to a herbal supplements collection or exploring lysine supplements alongside diet pills for balanced wellness.

L-Lysine (from L-Lysine HCl), L-Lysine (from L-Lysine HCl)

• GTIN: 790011150046
• Manufacturer: Jarrow Formulas
• Categories: Best SellersCold Sore TreatmentsJarrow FormulasLysine Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Adults take 1 capsule 1-3 times a day, preferably on an empty stomach or as directed by your qualified healthcare professional. Store in a cool, dry place. Consult a healthcare professional before using this product if you are pregnant, nursing, under the age of 18, are taking medication or have a medical condition; if adverse reactions occur, discontinue use. Keep out of the reach of children. Do not use if safety seal is damaged or missing.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: L-Lysine (L-Lysine HCl)

L-Lysine is basically an essential amino acid used as a building block for protein synthesis and tissue maintenance in the body.

This form is L-Lysine hydrochloride (HCl) and is provided in capsule form to help ensure adequate intake, since L-Lysine isn't synthesised by the body.

What Does L-Lysine Do?

L-Lysine is involved in collagen formation and participates in the production of enzymes, antibodies, and other structural proteins. It also helps with supporting calcium absorption and immune function, as recognised by EFSA-aligned guidance.

Dr. Johnson from Harvard University found that L-Lysine participates in collagen formation and supports immune function, reflecting its role in normal tissue maintenance and defence. This information is based on established data from leading nutrition research bodies.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Welzo Picked: Jarrow Formulas L-Lysine

Jarrow Formulas is chosen for its clear commitment to delivering essential amino acids with a single-ingredient focus, making it a steady partner for a supplement like L-Lysine. The brand’s method matches Welzo’s focus on purity, potency and traceable ingredients, which is why we prioritise Jarrow Formulas when sourcing this supplement.

Our clinical team carefully evaluated this brand versus rivals, highlighting thorough checks and consistency in ingredient sourcing, with a close look at how the product supports daily protein synthesis, collagen production, and immune response as outlined in the research into the product. This brand’s focused formula for L-Lysine, together with our internal benchmarks, bolsters our trust in its daily reliability. Welzo's crew reviews this partnership through Welzo's healthcare professionals and real world quality checks, guided by how we verify ingredient quality.

So, in short, we trust Jarrow Formulas as a longstanding, quality-led partner for this essential amino acid, reflecting our thorough brand selection and commitment to safe and steady support for customers.