Best L-Lysine Supplements for Immune Support of 2026

Pure Encapsulations L-Lysine Capsules are an amino acid supplement that provides essential nutrients to help maintain healthy immune function and gum health. With natural defense support, L-Lysine maintains healthy arginine production and supports the body's natural immune defenses. What makes this product stand out is its pure quality, using only premium ingredients sourced from trusted suppliers and free from wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.

Quantum Health SuperLysine+ Advanced Formula Immune Support Supplement is a powerful immune booster with ingredients like Vitamin C, Echinacea, Licorice, Propolis, and Odorless Garlic. It promotes collagen growth, supports lip health, and provides antioxidant support. The specially coated tablets are easy to swallow, and each bottle contains a full 60-day supply. It's an award-winning lysine power formula from a trusted leader in the natural products industry.

Bronson L-Lysine Defense Immune Support Complex is a non-GMO vegetarian capsule containing L-Lysine, Olive Leaf, Garlic, Vitamin C, and Zinc. L-Lysine helps to maintain healthy production of L-Arginine, support immune health, and maintain healthy lips. Olive Leaf and Garlic are natural immune support ingredients, and Vitamin C and Zinc help replenish the body with essential nutrients to maintain a healthy immune system. The product is tested in a cGMP registered facility in New York and has been trusted since 1960.

THORNE Lysine Capsules are packed with benefits for you. Firstly, they aid in wound healing by boosting collagen production in your skin. Secondly, they support your immune system, helping it stay strong and keeping your gum and lip tissues healthy. Thirdly, these capsules promote skin elasticity and calcium absorption for robust bones and teeth. Lastly, they are free from common allergens, making them suitable for many users.

Best Naturals L-Lysine is a double-strength supplement that promotes stronger immune health and helps with cold sores. The product is third-party lab tested for purity and quality, and each tablet contains 1000mg of L-Lysine HCL. It is non-GMO, gluten-free, and contains no artificial color, flavor, or sweetener, preservatives, sugar, milk, corn, soy, egg, lactose, gluten, wheat, yeast, fish or sodium. This product is proudly made in USA, in a GMP compliant and FDA registered facility.

Coco and Luna L-Lysine Supplement for Cats is a highly beneficial cat herbal supplement that supports a strong immune system, eye function, and respiratory health. This L-Lysine powder is designed to provide essential cat vitamins for both older cats and kittens. It helps promote normal respiratory function, combating issues like sneezing, watery eyes, and runny noses. With its easy-to-serve powder format, it offers convenience and simplicity in administering the supplement to your feline companion. Manufactured in FDA-registered facilities that are NSF and GMP-certified in the USA, Coco and Luna L-Lysine Supplement for Cats is a brand you can trust. Made in the USA from US and globally sourced ingredients, this veterinarian-approved and hypoallergenic supplement brings relief to your cat's nose and may alleviate cold-like symptoms.

The Amazon Elements Lysine Complex with Vitamin C is a dietary supplement designed to support your immune health. Each serving contains 1500mg L-Lysine and 100mg Vitamin C, as well as echinacea and other harvested ingredients to promote overall wellness. The supplement is vegetarian, gluten-free, and free from artificial colors, flavors, and chemical preservatives. The tablets are made in a GMP facility in the USA and come in a 195 count bottle, providing a 2-month supply. Customers can reorder using Alexa voice shopping.

Clear Probiotics Lip and Skin Health is a probiotic supplement that promotes healthy and beautiful lips and skin. Its special formula contains powerful ingredients like lysine and vitamin C that prevent the production of arginine in the body, the common trigger for lip and mouth blisters. This supplement also balances out the bacteria responsible for outbreaks and improves gut health and microbiome. The vegan and non-GMO formula is 3rd party tested for purity, potency, and safety.

The Micro Ingredients L-Lysine Capsules offer a clean and potent way to support your health. This supplement uses pure, filler-free ingredients, making it easier for your body to digest and absorb the essential amino acid L-Lysine. Each serving delivers a strong 2,000mg dose in natural veggie capsules, helping you maintain consistent lysine levels. Since your body can't make lysine on its own, taking this supplement can support your collagen production, boost your immune system, and help keep your lips healthy. It's a convenient choice for anyone looking to add a high-quality lysine supplement to their routine.

The Tomlyn L-Lysine Supplement is designed to support your cat's overall health. This powder helps maintain normal eye function and promotes respiratory health, which is essential for your pet’s well-being. If your cat experiences common health issues like sneezing or watery eyes, this supplement can be beneficial. Just one to two scoops daily can strengthen your cat's immune system, providing the support needed for respiratory concerns. Plus, the fish flavor makes it easy to mix into their food, ensuring your cat enjoys taking their daily dose.