L-Lysine is a supplement containing lysine in its levorotatory isomeric form, the only form the body really needs. It is one of the most important essential amino acids for human health.
L-Lysine (the symbol of which is Lys or K) is an amino acid which the body cannot produce but which is nonetheless essential to health. Like all amino acids, L-lysine has two functional groups, an amine group (NH2) and a carboxyl one (COOH). It is ketogenic only, meaning it is converted solely into ketone bodies (not glucose). It is found in the diet, particularly in grains and pulses.
L-Lysine is able to cross the blood-brain barrier and reach a part of the brain where it is metabolised into α-aminoadipic acid, which can interact with a number of neuroreceptors (1).
There are eight essential amino acids: isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine. They’re termed ‘essential’ because they cannot be produced by the body but are nonetheless crucial for good health. Lysine and threonine are without doubt the most important (2).
The only way of meeting our needs for them is through diet and supplementation.
Inadequate lysine intake can adversely affect noradrenaline activity in the hypothalamus, a structure of the central nervous system. It can induce symptoms of protein deficiency, such as a decrease in the body’s overall resistance and problems with growth.
Insufficient intake is more common among socioeconomically disadvantaged populations.
In humans, normal plasma values for lysine are between 100 and 250 µmol/L (3).
The minimum amount recommended for adults is 30mg/kg, that’s 2700mg for someone weighing 90 kilos. Each vegetarian capsule of our supplement delivers 500mg of L-lysine. We therefore recommend taking between 6 and 12 capsules a day as required, or as advised by your therapist.
Good dietary sources of lysine are high-protein foods such as eggs, meat, beans, peas, cheese and certain fish such as sardines and mackerel. The amount of lysine per gram of protein is also important: foods with a lysine content of less than 5% per gram of protein are not considered good sources. These include chocolate, whole wheat, white flour, peanuts, soya and wheatgerm.
Taking L-lysine is considered safe. It has been used as a dietary supplement for several decades, with no evidence of side-effects, including at high doses (4).
However, you should not supplement with lysine at the same time as arginine as they compete with each other in the body. Similarly, lysine supplementation is not recommended if you are taking aminoglycoside antibiotics.
It is, however, possible to combine lysine with other amino acid or protein supplements, namely:
june 5 2024
Très bon produit , je recommande.
Very good product, I recommend it.
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march 3 2024
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I'm sorry, but it seems like the original text you provided is incomplete or missing. Could you please provide the full text that needs to be translated?
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march 4 2023
À associer à vitamine c liposomiale pour retarder les plaques d’atherome .
To be combined with liposomal vitamin C to delay atheroma plaques.
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february 1 2019
Résultats immédiats; la l-lysine de chez Supersmart m'aide à atténuer voire supprimer de nombreux problèmes de santé.
Immediate results; the L-lysine from Supersmart helps me alleviate or even eliminate numerous health issues.
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november 21 2018
Produto ajuda a equilibrar o imunológico 100% confiável.
The product helps to balance the immune system, 100% reliable.
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