L-Lysine 500mg, 100 Capsules - Klaire Labs - welzo
L-Lysine 500mg, 100 Capsules - Klaire Labs
L-Lysine 500mg, 100 Capsules - Klaire Labs - welzo
L-Lysine 500mg, 100 Capsules - Klaire Labs
"Very quick delivery. Used 3 times, each order arrived the next day before 12:00"
Hugo Dover
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
Elina Goulliard
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Elizabeth Moore

L-Lysine 500mg, 100 Capsules - Klaire Labs

84 Reviews
See full range
L-Lysine helps prevent cold sores and boosts immune function, helping cut recurrence and severity of herpes simplex outbreaks, making lysine supplementation easier for busy, health-minded folks.
£17.36
Sale price £17.36
Email when stocked
Secure Transaction
Excellent
Free UK delivery of orders over £50
Order within , for delivery by tomorrow, April 27.
As seen in
Featured in Daily Mirror, Yahoo, Daily Mail, Metro, Healthline and NBC
See full range

L-Lysine helps prevent cold sores and boosts immune function, helping cut recurrence and severity of herpes simplex outbreaks, making lysine supplementation easier for busy, health-minded folks.

Available Sizes & Variants:

100 capsules — standard daily dose for maintenance.

Benefits & Features:

  • Helps prevent cold sores by delivering 500 mg lysine per capsule.
  • May help reduce recurrence and severity of outbreaks in those prone.
  • For ongoing prevention, studies have linked daily intakes around 1,000 mg to fewer cold sores, while lower doses may not show the same benefit consistently.
  • Great for daily use to support immune function and overall wellbeing.
  • Clean capsule formula keeps inactive ingredients low.

Beyond purity, Klaire Labs' approach starts at the source. The brand sticks to certificates of analysis and ingredient verification, with a long standing dedication to cGMP and third party testing. The 500 mg lysine per capsule makes it easy to fit this amino acid into your daily routine. It sits neatly in our supplement store and herbal supplements shelves for easy daily use, helping you find lysine supplements with confidence.

(other) Vegetarian capsule (hydroxypropyl methylcellulose, water), ascorbyl palmitate, and silicon dioxide.

GTIN
828054010505
Manufacturer
Klaire Labs
Best buy
6 to 24 months+

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched 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 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

Take 1 capsule up to 6 times a day, or as advised by your healthcare provider. Adult -: 6 capsules with food or as directed by a healthcare professional. Children 4 to 14 years - Take up to 3 capsules daily or as directed by a healthcare professional. Children less than 4 years of age - only as directed by a healthcare professional.

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

Serving Size 1 Capsule
L-Lysine (as L-lysine HCI)500 mg*
* Daily value not established
1. Promotes healthy immune function: L-Lysine is an essential amino acid that plays a key role in the production of antibodies and helps strengthen the body's immune system, making it more resistant to infections and illnesses.
2. Supports healthy skin and tissue repair: L-Lysine is involved in the production of collagen, a protein that is essential for maintaining healthy skin, connective tissues, and bones. It also helps speed up the healing process of wounds and injuries.

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

L-Lysine is an essential amino acid that plays a vital role in building body proteins and supporting tissue growth and repair.

This form is pharmaceutical-grade L-lysine hydrochloride, supplied as a single-ingredient supplement with minimal excipients for encapsulation.

What Does L-Lysine Do?

L-Lysine aids in protein synthesis and is involved in normal immune function and tissue repair.

This nutrient supports routine physiological processes and, in research contexts, has been associated with reduced recurrence and perceived severity of cold sore outbreaks in susceptible individuals, alongside broader roles in growth and calcium utilisation.

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

Klaire Labs has a long-standing track record in the supplement industry, recognised for adhering to current good manufacturing practices (cGMP) and a robust quality control framework. This heritage of quality, including in-house and third-party testing for purity and potency, sets Klaire Labs apart as a trusted partner for Welzo.

The brand's quality ethos is further demonstrated by their rigorous raw material verification, finished product analysis and contaminant screening. Their commitment to ingredient sourcing and transparency, with COAs from vetted suppliers and dedicated incoming material checks, aligns with Welzo's standards for trust and safety. Our evaluation emphasised Klaire Labs' emphasis on traceability and ethical sourcing as core strengths in a premium category.

For L-Lysine, Klaire Labs offers a product that complements their quality-centric approach, making it a natural fit for Welzo customers seeking a single-ingredient, well-controlled lysine supplement. This brand aligns with our expert-led selection framework, and we confidently recommend Klaire Labs as a trusted supplier. This brand was evaluated by our team of medical experts for compliance with our quality certification process.

Part of the Welzo System™

Test, supplement, enhance, and move, all in one place.

30-Day Money Back Guarantee
GMP Certified Facilities
Third-Party Tested
Vegan & Non-GMO
Rated Excellent
by 30,000+ Positive ReviewsTrustindex verified
  • 5 stars: 1 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
F
Frederick Kent

I am extremely satisfied with my purchase of the l-lysine 500mg 100 capsules from Klaire Labs. The quality is top-notch and I've noticed significant improvements in my health since I started using them. Highly recommended!

Rated 4.8/5 by 27,000+ Customers
UKAS Accredited Labs
Free Next-Day Delivery Over £50
Science-Backed Formulations

Content team: Dr Sameer Nakedar

Role: Chief Medical Officer

MBBS (London), MRCGP, PGCert

Content team: Paola Drexlar

Role: Medical Content Writer, UK

BA (Hons) Journalism

Frequently Asked Questions

Everything you need to know about this product.