{"title":"L-Tyrosine","description":"\u003ch2\u003eLa L-tyrosine en complément alimentaire, formes, dosages et associations\u003c\/h2\u003e\u003cp\u003eLa L-tyrosine est un acide aminé protéinogène, c'est-à-dire l'un des vingt acides aminés qui composent les protéines du corps humain. Elle est qualifiée de non essentielle, car l'organisme peut la produire à partir de la phénylalanine, un acide aminé essentiel apporté par l'alimentation. Son nom vient du grec tyros, qui signifie fromage, puisqu'elle a été isolée pour la première fois à partir de la caséine. Aucune allégation de santé n'est autorisée dans l'Union européenne pour la L-tyrosine elle-même, cette page reste donc informative sur ce point.\u003c\/p\u003e\u003cp\u003eChez LUTO Supplements, la L-tyrosine est disponible en gélules, avec deux références complémentaires. Le L-Tyrosine avec Biotine 1200 mg de LUTO Supplements associe l'acide aminé à de la biotine et se présente en boîte de 90 gélules. Le L-Tyrosine Ultra 950 mg de German Elite Nutrition propose l'acide aminé seul en boîte de 365 gélules. Sur cette page, vous découvrez ce qu'est la tyrosine, quelles formes existent, ce qu'apporte la biotine et comment comparer deux étiquettes.\u003c\/p\u003e\u003ch3\u003eQu'est-ce que la L-tyrosine ?\u003c\/h3\u003e\u003cp\u003eLa L-tyrosine est un acide aminé aromatique, doté d'un cycle phénolique qui lui donne ses propriétés particulières. Elle est présente dans la quasi-totalité des protéines alimentaires et corporelles. L'organisme la synthétise dans le foie à partir de la phénylalanine, grâce à une enzyme spécifique. Elle sert aussi de point de départ à la fabrication d'autres molécules de l'organisme. La lettre L désigne la configuration naturelle, la seule employée en nutrition humaine et dans les compléments alimentaires.\u003c\/p\u003e\u003ch3\u003eUn acide aminé non essentiel mais conditionnellement essentiel\u003c\/h3\u003e\u003cp\u003eLa tyrosine est classée parmi les acides aminés non essentiels, puisque le corps sait la produire. Elle est toutefois souvent décrite comme conditionnellement essentielle, car sa production dépend entièrement de la disponibilité en phénylalanine. Lorsque l'apport en phénylalanine est réduit, la tyrosine doit alors provenir directement de l'alimentation. Cette nuance explique pourquoi elle figure dans de nombreuses formules destinées à des régimes alimentaires particuliers ou à des apports protéiques limités.\u003c\/p\u003e\u003ch3\u003eOù trouve-t-on la tyrosine dans l'alimentation ?\u003c\/h3\u003e\u003cp\u003eLes aliments riches en protéines en sont les meilleures sources. Les fromages affinés arrivent en tête, en particulier le parmesan, suivis du soja et de ses dérivés comme le tofu et le tempeh. La viande, la volaille, le poisson, les oeufs, les graines de courge, les graines de sésame, les amandes et les cacahuètes en apportent également. Une alimentation apportant suffisamment de protéines couvre en principe les besoins, puisque la tyrosine accompagne systématiquement les protéines complètes.\u003c\/p\u003e\u003ch3\u003eL-tyrosine libre ou N-acétyl-L-tyrosine ?\u003c\/h3\u003e\u003cp\u003eLa L-tyrosine sous forme libre est la molécule seule, celle que l'on retrouve dans la majorité des compléments. Sa solubilité dans l'eau est limitée, ce qui explique qu'elle soit surtout proposée en gélules ou en comprimés plutôt qu'en boisson. La N-acétyl-L-tyrosine, abrégée en NALT, porte un groupe acétyle qui améliore nettement sa solubilité. Elle contient en revanche moins de tyrosine par gramme, un détail à garder en tête lorsque vous comparez les dosages affichés.\u003c\/p\u003e\u003ch3\u003eLa biotine dans la formule LUTO Supplements\u003c\/h3\u003e\u003cp\u003eLe L-Tyrosine avec Biotine de LUTO Supplements associe l'acide aminé à de la biotine, également appelée vitamine B8 ou B7. La biotine contribue au métabolisme énergétique normal, au fonctionnement normal du système nerveux, à des fonctions psychologiques normales et au métabolisme normal des macronutriments. Elle contribue également au maintien de cheveux normaux, d'une peau normale et de muqueuses normales. La valeur nutritionnelle de référence européenne pour la biotine est de 50 µg par jour.\u003c\/p\u003e\u003ch3\u003eQuelle quantité de tyrosine par jour ?\u003c\/h3\u003e\u003cp\u003eLa tyrosine ne dispose pas d'une valeur nutritionnelle de référence affichable sur les emballages, contrairement aux vitamines et aux minéraux. Les compléments du marché proposent le plus souvent entre 500 et 2000 mg par dose journalière, en une ou plusieurs gélules. Le L-Tyrosine Ultra de German Elite Nutrition apporte 950 mg par gélule, tandis que la formule de LUTO Supplements est dosée à 1200 mg. Respectez toujours la dose recommandée figurant sur l'emballage du produit choisi.\u003c\/p\u003e\u003ch3\u003eComment comparer deux produits à base de tyrosine ?\u003c\/h3\u003e\u003cp\u003eTrois éléments méritent d'être regardés avant l'achat. Le premier est la quantité de tyrosine par gélule et par dose journalière, à ne pas confondre avec le poids total de la gélule. Le deuxième est la forme utilisée, tyrosine libre ou N-acétyl-L-tyrosine, puisque leur teneur en tyrosine réelle diffère. Le troisième est la présence éventuelle d'autres nutriments comme la biotine, qui change la nature du produit et son intérêt selon votre routine.\u003c\/p\u003e\u003ch3\u003eFormats, prise et bonne utilisation\u003c\/h3\u003e\u003cp\u003eLa gélule reste le format le plus adapté à la tyrosine, en raison de sa faible solubilité et de son goût peu agréable en poudre. La boîte de 90 gélules convient pour un premier essai, tandis que celle de 365 gélules couvre une année à raison d'une prise par jour. La tyrosine se prend généralement le matin, à jeun ou avant un repas, selon l'indication de l'étiquette. Un complément alimentaire ne remplace pas une alimentation variée et équilibrée ni un mode de vie sain. Ce produit est déconseillé aux personnes atteintes de phénylcétonurie et à celles qui suivent un traitement médical sans avis d'un professionnel de santé.\u003c\/p\u003e","products":[{"product_id":"gen-l-tyrosine-ultra-950mg-365-gelules","title":"L-Tyrosine Ultra 950mg | 365 Capsules | German Elite Nutrition","description":"\u003ch2\u003eL-Tyrosine Ultra by German Elite Nutrition\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eL-tyrosine\u003c\/strong\u003e is an amino acid that your body can produce itself from the amino acid phenylalanine. German Elite Nutrition offers it in an Ultra capsule form, highly dosed at 950 mg per capsule. Four capsules together provide 3800 mg of L-tyrosine per day. One container holds 365 capsules and lasts approximately three months at this dosage. The raw material comes from vegetable fermentation, making the product suitable for vegans. This gives you a pure amino acid product, at a high and fixed dosage, regardless of the rest of your diet.\u003c\/p\u003e\n\u003ch3\u003eWhat L-tyrosine is\u003c\/h3\u003e\n\u003cp\u003eL-tyrosine is one of the amino acids that your body can build itself. This means that you are not entirely dependent on diet for its production; in this case, your body makes it from phenylalanine. In the diet, tyrosine is found primarily in protein-rich products such as cheese, meat, fish, eggs, nuts, and legumes. The name even refers to it: tyrosine is derived from the Greek word for cheese, as the substance was first extracted from it. Amino acids are the building blocks of proteins, and tyrosine is one of them. As an isolated supplement, L-tyrosine provides a fixed amount per capsule, so you receive the same dosage every time, regardless of what else is on your plate. This makes it easier to accurately track your daily intake. This differs from tyrosine from food, the amount of which can vary greatly from meal to meal.\u003c\/p\u003e\n\u003ch3\u003e950 mg per capsule, highly dosed\u003c\/h3\u003e\n\u003cp\u003eThe Ultra capsules each contain 950 mg of L-tyrosine, one of the highest dosages per capsule on the market. With four capsules per day, you reach 3800 mg. Since each capsule contains a lot, the capsules are a bit larger than average; this is the trade-off for a high dosage without excipients. The raw material is produced by a vegetable fermentation process, during which microorganisms build tyrosine from a nutrient medium. Since nothing is added, you know precisely with each capsule how much L-tyrosine you are taking. You can easily adjust the number of capsules to your own needs: some people take less on quiet days and the full four on busy or intensive days. Since the dosage per capsule is high, you need fewer than for products containing, for example, 500 mg per capsule, which keeps daily intake simple. For those who prefer a lower dosage, dividing the daily portion is simple: just omit a capsule, without breaking or weighing anything.\u003c\/p\u003e\n\u003ch3\u003eVegan and additive-free\u003c\/h3\u003e\n\u003cp\u003eEach capsule consists of L-tyrosine and a plant-based HPMC shell. Nothing else is included: no magnesium stearate as a lubricant, no flavor, no colorant, and no gelatin. The product is therefore suitable for vegans and vegetarians, and is free from the most common additives. It is also gluten-free and lactose-free. Each batch is controlled in an independent laboratory for purity and content, so that the composition remains identical from one container to the next and the 950 mg indicated on the label truly corresponds to 950 mg in the capsule. For those who pay attention to a short ingredient list without unnecessary fillers, this is an appreciated feature. With this product, you know exactly what you have in hand: the amino acid and the plant-based shell, and nothing else.\u003c\/p\u003e\n\u003ch3\u003eUse and storage\u003c\/h3\u003e\n\u003cp\u003eTake four capsules daily with sufficient water, preferably spread throughout the day. Many people prefer to take L-tyrosine in the morning, but you can adjust the timing to suit you. Do not exceed the recommended daily dose and use the product as a supplement, not as a substitute for your diet. Store the container tightly closed, in a cool, dry place away from direct sunlight, and keep it out of reach of young children. With 365 capsules per container, you have approximately three months' supply at home, at a rate of four capsules per day. Always close the container tightly after opening, so that the capsules remain dry and the quality is preserved until the expiration date. One container lasts a full season with daily use, so you don't need to reorder often.\u003c\/p\u003e\n\u003cp\u003eIn short, with L-Tyrosine Ultra you get a pure and highly dosed amino acid product: 950 mg of L-tyrosine per capsule, from vegetable fermentation and without superfluous additives. With 365 capsules per container and a fixed dosage, you know precisely what you are taking and how long the container will last you. For those looking for a simple, high-concentration tyrosine product, this is a clear choice.\u003c\/p\u003e","brand":"German Elite Nutrition","offers":[{"title":"Default Title","offer_id":49386120118500,"sku":"gen-026","price":23.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/9724\/7460\/files\/L-TyrosineUltraCapsGEN.jpg?v=1783855444"},{"product_id":"luto-l-tyrosine","title":"L-Tyrosine with Biotin 1200mg | 90 Capsules | LUTO Supplements","description":"\u003ch2\u003eL-Tyrosine 1200 mg with Biotin Capsules\u003c\/h2\u003e\n\u003cp\u003eDo you know that feeling of having your head too full? Busy workweeks, too many tabs open, and in between, you're still trying to think clearly. During such times, many people look for ways to supplement their amino acid intake. \u003cstrong\u003eL-Tyrosine\u003c\/strong\u003e is one such amino acid. This supplement from LUTO Supplements provides 1200 mg per daily dose, spread across two vegetable capsules. And it contains biotin (vitamin B8). A remarkable addition that you won't find in all tyrosine supplements.\u003c\/p\u003e\n\u003ch3\u003eWhat L-Tyrosine does exactly in your body\u003c\/h3\u003e\n\u003cp\u003eL-Tyrosine is an amino acid that your body normally produces itself from phenylalanine, another amino acid from your diet. Think of chicken, eggs, dairy products, or nuts. In your cells, L-Tyrosine serves as a raw material. Your body converts it step by step: first into L-DOPA, then into dopamine, and finally into noradrenaline and adrenaline. These are signaling substances that are involved throughout your brain. The difference with tyrosine from a steak? In capsules, it's in free form. Not bound to proteins, so your body doesn't need to break it down first. What many people don't know: the absorption of L-Tyrosine competes at the blood-brain barrier (the gate between your blood and your brain) with other large amino acids. If you take it with a protein-rich meal, more amino acids are queuing up. That's why taking it on an empty stomach or between meals is often more favorable.\u003c\/p\u003e\n\u003ch3\u003eWhy biotin is included in this formula\u003c\/h3\u003e\n\u003cp\u003eIn addition to the amino acid, each daily dose contains 50 µg of biotin. That's exactly 100% of the reference intake. Most L-Tyrosine capsules on the market contain only the amino acid itself. Here, this vitamin is added as standard. Biotin contributes to normal energy-yielding metabolism and normal macronutrient metabolism. But it doesn't stop there. Biotin also contributes to the normal functioning of the nervous system and normal psychological function. The combination is logical: L-Tyrosine provides the raw material, while biotin plays a role in your energy metabolism and nervous system.\u003c\/p\u003e\n\u003ch3\u003eWhere 1200 mg of L-tyrosine per day falls within the dosage range\u003c\/h3\u003e\n\u003cp\u003ePer capsule, there is 600 mg of L-Tyrosine. With two capsules a day, you reach 1200 mg in total. In practice, this means you are at the higher end of what is common for amino acid supplements in this category. In scientific research, higher amounts are sometimes used, around 100 to 150 mg per kilogram of body weight. For a 75-kilogram person, that quickly amounts to 7500 mg or more. That's a different story altogether. But for daily use as a supplement, 1200 mg is a solid dosage. A jar contains 90 capsules, so at the recommended intake, you have enough for 45 days.\u003c\/p\u003e\n\u003ch3\u003eFree L-Tyrosine versus the acetyl variant\u003c\/h3\u003e\n\u003cp\u003eThere are several forms of this amino acid on the market. The two most well-known are regular L-Tyrosine and N-acetyl-L-tyrosine (NALT). The difference lies in absorption. Regular L-Tyrosine is the most studied and common supplement form. NALT seems interesting on paper, but in practice, this variant turns out to be less well-supported when it comes to increasing the level of free tyrosine in your blood. LUTO Supplements has chosen the classic free form here. The capsules themselves are made of HPMC, a vegetable cellulose base. No gelatin, no animal ingredients. The product is also gluten-free and lactose-free, and it is manufactured in the Netherlands.\u003c\/p\u003e\n\u003cp\u003eIn short: a straightforward amino acid supplement with a thoughtful addition of biotin. Vegetable capsules, produced domestically, and with the most common form of L-Tyrosine. For anyone who wants to supplement their daily intake during busy periods, without superfluous additions.\u003c\/p\u003e","brand":"LUTO Supplements","offers":[{"title":"Default Title","offer_id":49390678507748,"sku":"8720865080826","price":20.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/9724\/7460\/files\/L-tyrosinefoto_s_3b582528-5050-4fc0-91fd-44383045909f.png?v=1783928944"}],"url":"https:\/\/www.luto-supplements.fr\/en\/collections\/l-tyrosine.oembed","provider":"LUTO Supplements France","version":"1.0","type":"link"}