Ecological Formulas L-Lysine 500 mg Review
L-Lysine 500 Mg, 250 Capsules, by Ecological Formulas is listed on this page under the Vitamins & Supplements category with the product code l-lysine-500-mg-ECF. The page introduces the product with the statement that L-Lysine from Ecological Formulas contains the purest form of the amino acid L-Lysine. The product is described as a crystalline amino acid. The page states that it contains no gluten, casein, corn, soy, yeast, wheat, sugar, starch, coloring agents or artificial flavoring. The Product Details section lists the brand as Ecological Formulas and the servings per container as 250. The Suggested Usage section says to take one capsule daily between meals, or as directed by a physician. It also says the product may be taken in conjunction with vitamins and minerals. The Ingredients section lists a serving size of 1 and 250 servings per container. Under amount per serving, it lists L-Lysine HCl 500 mg. The other ingredients are listed as gelatin, silicon dioxide and magnesium stearate. The page repeats that the product is free of gluten, casein, corn, soy, yeast, wheat, sugar, starch, coloring agents, or artificial flavoring. The Warnings section advises not to refrigerate the product and not to take it with other dairy products. It says that anyone who is pregnant, nursing, trying to conceive, taking any medications, or has a medical condition should consult a healthcare practitioner before using the product. It also says to keep the product out of reach of children. The page also presents a Doctor Trusted Brand message stating that professional-grade products adhere to strict standards for purity and potency and use the highest-grade ingredients available. Feature badges on the page include Fast Shipping, Practitioner Approved, Freshness Guarantee and 5 Point Inspection. A subscription option is offered with a 5% savings and a one-time purchase price, along with a 30-day return policy and free standard shipping on orders over $35 within the US. The page also offers a bundle with a Pure Encapsulations magnesium glycinate product, which is a separate item and is not part of this listing. No customer reviews are shown on the page yet, and the page invites shoppers to write the first review.
Study, Trial or Testing Result Summary
Members Only8 human studies · 4 improved
This product gives 500 milligrams of lysine a day, well below the 3,000 milligrams that worked in the main studies. In people with frequent herpes outbreaks, 3,000 milligrams a day for six months led to about 2.4 fewer outbreaks, milder symptoms and faster healing than placebo [1]. In people with type 2 diabetes, 3 grams a day for three months raised the activity of a germ-killing enzyme [2]. In families in northern China, wheat flour with added lysine for three months raised T cell counts and several immune proteins [3]. A similar flour trial in rural Syria raised one immune protein in men and reduced diarrhea in women, with no other differences [4]. Lower doses closer to this product did less. In one herpes trial, 1,248 milligrams a day seemed to reduce how often outbreaks came back, while 624 milligrams did not, and neither dose sped healing [5]. Another trial at 1,200 milligrams a day found no clear benefit [6]. At 500 milligrams, the dose in this product is below any amount shown to help. Animal and cell studies are never counted.
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- In 88 families (a man, a woman and a child each) in northern China, wheat flour fortified with lysine for three months raised T cell counts and several immune proteins (IgG, IgA, IgM, C3) compared with plain flour.Lysine-fortified wheat flour improves the nutritional and immunological status of wheat-eating families in northern Chin…
- In rural Syrian men, women and children over 16 weeks, lysine-fortified flour raised complement C3 in men and reduced diarrhea in women, but showed no other significant differences from the control group.Impact of lysine-fortified wheat flour on morbidity and immunologic variables among members of rural families in northwe…
- In 52 people with frequently recurring herpes infections, 3,000 mg of lysine a day for 6 months led to about 2.4 fewer outbreaks, milder symptoms and faster healing than placebo.Success of L-lysine therapy in frequently recurrent herpes simplex infection. Treatment and prophylaxis.
- In 50 people with type 2 diabetes, 3 g of lysine a day for three months reduced advanced glycation end products and increased the activity of lysozyme, a germ-killing enzyme, compared with the control group.The Preventive Effect of L-Lysine on Lysozyme Glycation in Type 2 Diabetes.
- In 48 malnourished Nicaraguan children aged 1 to 5, a snack made from lysine-rich maize for 3.5 months improved growth but did not change diarrhea or respiratory infections compared with regular maize.[The effect of consuming quality protein maize or conventional maize on the growth and morbidity of malnourished Nicarag…
- In 41 people with recurring herpes, 1,248 mg of lysine a day appeared to reduce how often outbreaks came back, while 624 mg did not, and neither dose shortened healing time compared with placebo.Treatment of recurrent herpes simplex infections with L-lysine monohydrochloride.
- In 21 healthy adults with frequently recurring herpes, 400 mg of lysine three times a day showed no clear benefit for treating or preventing outbreaks compared with placebo.Failure of lysine in frequently recurrent herpes simplex infection. Treatment and prophylaxis.
- In patients with recurrent infections, a lysine and arginine combination increased the movement and chemotaxis of neutrophils (infection-fighting white blood cells), and raised the number of cytotoxic lymphocytes and IgG antibody levels.Effects of lysine-arginine association on immune functions in patients with recurrent infections.
Review Totals and Summary
Members Only23,183 reviews · 98% positive
Customer feedback for L-Lysine, while not specifically abundant for the Ecological Formulas brand on many retailer sites, reveals several qualitative themes regarding the general use and perceived efficacy of L-Lysine supplements. Many online retailers for Ecological Formulas L-Lysine 500 mg currently show no specific customer reviews, often displaying prompts like "Be the first to write a review" or "No reviews yet." However, broader customer feedback for L-Lysine as a supplement, particularly on platforms like WebMD, highlights its perceived benefits and occasional limitations. A predominant theme among users is the supplement's effectiveness in managing and preventing herpes simplex virus (HSV) outbreaks, commonly known as cold sores. Numerous individuals report a significant reduction in the frequency, severity, and duration of these outbreaks, with some even experiencing a complete cessation of cold sores after consistent L-Lysine supplementation. This particular benefit appears to be a primary driver for many customers seeking out L-Lysine. Users often describe taking L-Lysine proactively to ward off outbreaks or at the first sign of tingling, suggesting a strong belief in its antiviral properties. Beyond cold sore management, some customers also note L-Lysine's contribution to general immune system support. Individuals report taking the supplement when feeling run down, during periods of increased exposure to illness, or when they feel they might be fighting something off, indicating a perceived boost to their body's natural defenses. One anecdotal account even linked L-Lysine use to relief from sciatic pain, depression, and headaches, suggesting a broader, though less commonly reported, range of benefits for some users. Conversely, the customer feedback also includes instances where L-Lysine did not meet expectations, particularly concerning HSV management. Some users, even at high dosages (e.g., 6000 mg or 12000 mg daily), found the supplement ineffective for their outbreaks and ultimately reverted to prescription antiviral medications like Valtrex. This suggests that while L-Lysine is highly beneficial for many, its efficacy can vary between individuals, and it may not be a universal solution for all cases of HSV. The general consensus from broader reviews indicates that L-Lysine is usually well-tolerated with minor side effects, which is a positive qualitative aspect for users. However, the specific benefits for other advertised uses, such as increasing muscle strength or improving bone health, are not as clearly or consistently articulated in customer testimonials, with some professional analyses noting these benefits are "not well defined" or "not clear."
Biohacker Summary
Members Only6 of 10 recommend it
Three of the ten panelists spoke about L-lysine, the main ingredient here, and two of them recommend it while the third is neutral in the latest statement but earlier recommended it. They mainly take it for viral problems such as shingles, herpes and cold sores, and one also mentioned thicker hair and connective tissue health. The reasoning given is that lysine competes with arginine, another amino acid the virus needs, so some suggest eating foods high in lysine and low in arginine, or taking a supplement. For doses, one panelist suggested at least 600 milligrams once or twice a day for shingles and 3000 milligrams for intense cases. One panelist paired it with high-dose intravenous vitamin C for viral reactivation, and another wondered whether a broad amino acid blend containing arginine would weaken its effect on cold sores. No one reported a caution or said they stopped.
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Dr. Eric Berg · L-Lysine · recommends
- Recommends L-lysine because it competes with L-arginine, which the virus needs to reproduce, thus blocking the virus from getting arginine and starving it off.
- Recommends taking an L-lysine supplement or consuming foods high in L-lysine for thicker hair.
- Recommends L-lysine for shingles.
- Recommends eating foods high in l-lysine or taking l-lysine supplements to put the herpes virus into remission, especially if consuming foods high in arginine. For intense cases, 3000 milligrams is recommended.
- Recommends taking at least 600 milligrams of L-lysine once or twice a day to help with shingles.
Dr. Mark Hyman · L-Lysine · recommends
- Recommends pairing high-dose IV vitamin C with L-lysine, an amino acid with an antiviral component, for viral reactivation.
- Dr. Hyman mentions that L-Lysine, an amino acid, can help inactivate the Epstein-Barr virus and is often taken to prevent herpes outbreaks.
Ben Greenfield · L-Lysine · neutral
- Angie is wondering if taking a broad spectrum amino acid supplement with L-arginine would inhibit the effectiveness of L-lysine for cold sores.
- Ben says that L-lysine is really important for connective tissue health and can have a significant effect on cold sores, recommending a lysine supplement or foods high in lysine and low in arginine.
RAL Summary
Members OnlyTier 4 for Immune Health
The 23,183 review count and the review summary do not come from this Ecological Formulas product, since the summary itself says its retailers show no reviews and draws on general lysine feedback from sites like WebMD. Its reviews are set aside, so it is graded on its studies alone. Its studied ingredients are not at the doses that worked in studies, and reviews are not strong enough on their own.
- Emerging: not enough evidence to rank higher yet.
- Lysine: below the dose that worked in studies
Where the evidence disagrees: 2 of the 8 human studies found no effect.
More Details
Members OnlyBody systems · Combine with · Possible side effects
Body systems: Immune system
Combine with: To enhance collagen synthesis, consider combining L-Lysine with Vitamin C, which is essential for collagen production. For broader immune support, Zinc and Vitamin D can be synergistic, especially in maintaining overall immune health and potentially aiding in defense against viral challenges. Additionally, other amino acids like Proline and Glycine, or a general collagen peptide supplement, can further support connective tissue health.
Possible side effects: No major side effects reported.
Supplement Facts
L-Lysine Hydrochloride 500 mg
| L-Lysine Hydrochloride | 500 mg | † |
Other ingredients: Gelatin, Silicon Dioxide, Magnesium Stearate.
Directions: Directions Take one capsule daily between meals, or as directed by a physician. L-Lysine may be taken in conjunction with vitamins and minerals. Do not refrigerate. Do not take with dairy products.
Barcode (UPC) 696859132254 · Label source: NIH label database · Report a label change
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Where to Buy
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Graded November 3, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.
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