Life Extension L-Lysine is a lysine supplement that helps support calcium absorption and retention, promotes healthy nitrogen balance, and contributes to a balanced stress response. The product is made to high standards, and Life Extension follows GMP practices with third party testing for safety and label accuracy. This heritage of rigorous quality helps you feel confident in a reliable, science based lysine supplement. Simple to take daily.

Available Sizes & Variants:

100 capsules lysine supplement - convenient daily dose

Benefits & Features:

• Supports calcium absorption for stronger bones.
• Promotes relaxation in individuals with low dietary lysine, supporting a calmer stress response.
• Star ingredient L-Lysine helps protein synthesis and calcium metabolism, supporting tissue repair, calcium retention, and bone and vascular health, while contributing to a balanced nitrogen status.
• Daily use is suitable on an empty stomach as part of a balanced routine.
• Life Extension's commitment to science and quality means transparent sourcing, non GMO standards, and tamper evident packaging.

Life Extension has built a reputation for evidence based formulations and rigorous quality control. The brand emphasises GMP certification, third party testing, and transparent labeling, which helps you trust every capsule. For those using lysine supplements as part of a routine, this product fits neatly into a bone health and stress management plan; many customers also pair it with a vitamin d supplement or probiotics for gut health as part of a holistic approach.

L-Lysine (as L-Lysine HCl), L-Lysine (as L-Lysine HCl)

• GTIN: 737870167815
• Manufacturer: Life Extension
• Categories: Best SellersCold Sore TreatmentsLife ExtensionLysine SupplementsSubscribe & Save Products
• 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.

Take one capsule one to three times daily on an empty stomach, or as recommended by a healthcare practitioner. Store tightly closed in a cool, dry place. Keep out of reach of children. Do not exceed the recommended dose. Do not purchase if the outer seal is broken or damaged. When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

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 is a vital amino acid that serves as the building block for protein making, helping keep tissues and repair going.

This form arrives as a vegetarian capsule housing L-Lysine, the main active ingredient in this product, with plant-based capsule materials and light excipients to help keep formulation solid.

What Does L-Lysine Do?

L-Lysine helps support calcium absorption and retention and supports healthy nitrogen balance, contributing to normal bone and vascular health processes. It also supports a balanced stress response and may help inhibit glycation, a process linked with tissue ageing.

Dr. Smriga of the University found that daily intakes in the 500–1000 mg range can help support calcium metabolism and promote relaxation in individuals with low dietary intake, aligning with its role in supporting normal physiological functions.

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

Life Extension is the partner we rely on for L-Lysine because their quality ethos centres on rigorous science, transparent sourcing, and steadfast commitment to safety. Their adherence to GMP practices and ongoing third‑party testing aligns with our high standards, and their Non-GMO LE Certified labelling strengthens consumer confidence. This brand has a solidly established reputation for evidence‑based product development and quality manufacturing, supported by a medical advisory board oversight and a history of transparent ingredient governance.

For UK customers, Life Extension’s rigorous quality controls and tamper‑evident packaging reinforce reliability at every step, from formulation to finished capsule. This is complemented by their clear emphasis on accurate labelling and safety verification, which we confirm via the certifications we require.

Welzo chose Life Extension for this L-Lysine because their thorough testing standards, proven integrity, and focus on purity make them a solid product fit and a dependable partner for ongoing wellness support. Learn more about our team's evaluation at our medical team.