SKU: 82200361689

L-Tyrosine met Biotine 1200mg | 90 Capsules | LUTO Supplements

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L-Tyrosine met Biotine 1200mg | 90 Capsules | LUTO SupplementsL Tyrosine 1200 mg Capsules met Biotine Ken je dat gevoel dat je hoofd overvol zit? Drukke werkweken, te veel tabbladen open, en ergens tussendoor probeer je nog helder na te denken. In dat soort periodes zoeken veel mensen naar manieren om hun aminozuurinname aan te vullen. L Tyrosine is zo'n aminozuur. Dit supplement van LUTO Supplements levert 1200mg per dagdosering, verdeeld over twee plantaardige capsules. En er zit biotine (vitamine B8) bij. Een

L-Tyrosine 1200 mg Capsules met Biotine

Ken je dat gevoel dat je hoofd overvol zit? Drukke werkweken, te veel tabbladen open, en ergens tussendoor probeer je nog helder na te denken. In dat soort periodes zoeken veel mensen naar manieren om hun aminozuurinname aan te vullen. L-Tyrosine is zo'n aminozuur. Dit supplement van LUTO Supplements levert 1200mg per dagdosering, verdeeld over twee plantaardige capsules. En er zit biotine (vitamine B8) bij. Een opvallende toevoeging die je niet in elk tyrosinesupplement tegenkomt.

Wat L-Tyrosine precies doet in je lichaam

L-Tyrosine is een aminozuur dat je lichaam normaal gesproken zelf aanmaakt uit fenylalanine, een ander aminozuur uit je voeding. Denk aan kip, eieren, zuivel of noten. In je cellen werkt L-Tyrosine als grondstof. Je lichaam zet het stap voor stap om: eerst naar L-DOPA, dan naar dopamine, en uiteindelijk naar noradrenaline en adrenaline. Dat zijn signaalstoffen die overal in je hersenen meespelen. Het verschil met tyrosine uit een biefstuk? In capsules zit het in vrije vorm. Niet gebonden aan eiwitten, dus je lichaam hoeft het niet eerst los te knippen. Wat veel mensen niet weten: de opname van L-Tyrosine concurreert aan de bloed-hersenbarrière (de poort tussen je bloed en je hersenen) met andere grote aminozuren. Neem je het samen met een eiwitrijke maaltijd, dan staan er meer aminozuren in de rij. Daarom werkt inname op een lege maag of buiten de maaltijden vaak gunstiger.

Waarom er biotine in deze formule zit

Naast het aminozuur bevat elke dagdosering 50 µg biotine. Dat is precies 100% van de referentie-inname. De meeste L-Tyrosine capsules op de markt bevatten alleen het aminozuur zelf. Hier zit die vitamine er standaard bij. Biotine draagt bij tot een normaal energieleverend metabolisme en tot een normaal metabolisme van macronutriënten. Maar daar stopt het niet. Biotine draagt ook bij tot de normale werking van het zenuwstelsel en tot een normale psychologische functie. De combinatie is logisch: L-Tyrosine levert de bouwstof, terwijl biotine een rol speelt in je energiestofwisseling en zenuwstelsel.

Waar 1200 mg L-tyrosine per dag in de doseringsrange zit

Per capsule zit er 600mg L-Tyrosine in. Bij twee capsules per dag kom je op 1200mg totaal. In de praktijk betekent dat: je zit aan de bovenkant van wat gangbaar is bij aminozuursupplementen in deze categorie. In wetenschappelijk onderzoek worden soms hogere hoeveelheden gebruikt, rond 100 tot 150mg per kilogram lichaamsgewicht. Voor iemand van 75 kilo is dat al snel 7500mg of meer. Dat is een heel ander verhaal. Maar voor dagelijks gebruik als aanvulling is 1200mg een degelijke dosering. Een pot bevat 90 capsules, dus bij de aanbevolen inname heb je daar 45 dagen mee.

Vrije L-Tyrosine versus de acetylvariant

Er bestaan meerdere vormen van dit aminozuur op de markt. De twee bekendste zijn gewone L-Tyrosine en N-acetyl-L-tyrosine (NALT). Het verschil zit hem in de opname. Gewone L-Tyrosine is de meest onderzochte en gangbare supplementvorm. NALT klinkt op papier interessant, maar in de praktijk blijkt die variant minder goed onderbouwd als het gaat om het verhogen van de vrije tyrosinespiegel in je bloed. LUTO Supplements heeft hier gekozen voor de klassieke vrije vorm. Trouwens, de capsules zelf zijn van HPMC, een plantaardige cellulosebasis. Geen gelatine, geen dierlijke ingrediënten. Het product is ook vrij van gluten en lactose, en wordt in Nederland geproduceerd.

Kort gezegd: een rechttoe rechtaan aminozuursupplement met een doordachte toevoeging van biotine. Plantaardige capsules, geproduceerd in eigen land, en met de meest gangbare vorm van L-Tyrosine. Voor wie zijn dagelijkse inname wil aanvullen in drukke periodes, zonder overbodige toevoegingen.

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SKU: 82200361689

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4.6 ★★★★★
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Geddes J
Omaha, US
★★★★★ 4
Good History Book
Format: Kindle
Twenty years that change history and the Americas. Even though the civil war ended slavery at a humongous cost, it it failed to bring social justice a d civil rights to the population of the country. It was not until 1920 that women were granted voting rights. And some problems and divisions persist nowdays.
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Reviewed in the United States on July 2, 2024
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Ian R
Waukegan, US
★★★★★ 5
interesting and fresh perspective on the American civil war
Format: Kindle
Fresh perspective on the well known American Civil War. I appreciate Dr Taylor’s emphasis on the preservation of slavery over the states’ rights argument for why the American Civil War was fought.
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Reviewed in the United States on June 1, 2024
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gloine36
Massapequa, US
★★★★★ 5
A Masterpiece by the most Influential Historian of the 20th Century
Format: Paperback
The late Edmund Morgan may very well have been the most influential American historian of the 20th century. So much of what he wrote has had a definitive impact on the field of American history that he literally stands above the rest of his peers. Few historians can claim to have changed how we view the founding of America, and Morgan is one of that very select company. In American Slavery, American Freedom Morgan managed to alter the relationship of slavery to America. While he was primarily writing about colonial Virginia, he explored the issue of slavery and illustrated how the colonial Virginians used racism to develop the form of chattel slavery that rose here in the colonies during the 17th century. Often as we teach our history courses our students will invariably answer the question about why people came to the colonies with the statement, "People wanted to be free." Yet, we know from the records that most people who came to Virginia were anything but free. The facts are there and have always been there proving this, yet few speak about it because it conflicts with American heritage. Morgan shattered that illusion in this book. He showed that colonial Virginia was the exact opposite of freedom and that many people in the 17th century were forced to go there. In addition he showed how thousands of people died in Virginia from various causes during the first half of the century. He also investigated the role of class in colonial Virginia and how those in power sought to use the colonial government to retain that power for themselves and similar people. At times this ran contrary to what the English monarchs wanted in their colonies, but the upper class of Virginia managed to overcome obstacles and stay in power. Morgan did this by examining the records of the colony including the laws as they were enacted. He found that many laws were designed to help those with money at the expense of those without. He also found where the laws changed and became race conscious which he interpreted as the sign that the upper class was making a clear distinction between white and black in order to create the classic Us vs. Them division. This division would be the racist wedge used to keep poor whites of the lower class from associating with the blacks of any class and to reinforce the status of slavery on all blacks. This book won the Francis Parkman award and is regarded as an American history classic. One of the great things about Morgan was that his writing was wonderful and academic at the same time. Notes are given to the reader on each page via footnotes and reveal the great depth of research that Morgan used to develop this topic. It is a must read even today for anyone studying the history of Virginia. It is also a wonderful example of what a history book should be in its style and literary quality. Morgan's appendix does make one wonder what would have happened had he developed a quantification theory to go with his topic. The data results would probably have reinforced his conclusion. The appendix is an early use of that type of approach and shows that Morgan's conclusion would have been validated by quantification. All in all this book is a must read for any scholar of Virginia, colonial America, or slavery. Reading it will help the student develop a deeper contextual feeling for how colonial Virginia developed and a greater understanding as to why certain things in this country came about. The theme of racism has been existent in America for centuries and Morgan showed us exactly why that was. This book is a must have in my collection and many others for its high quality of research.
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Reviewed in the United States on October 9, 2013
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Wald1900
Massapequa, US
★★★★★ 5
Fascinating Insights into the Origins of American Racism
Format: Paperback
This is a fantastic, must read book for anyone interested in the origins of American racism. Morgan recounts the cultural, economic and political evolution of the 17th and early 18th century Virginia, and with it, makes comprehensible the reasons why racial slavery emerged as an integral component to the development of the white community's pre-revolutionary ideals of independence and liberty. At the founding of the Jamestown colony in 1607, Virginia offered vast tracts of land available to anyone willing to make the trip and who could survive their first season (or two or three) in the New World. Unlike in England where opportunities for land ownership were constrained, the fact that Virginia land was to be had for the taking made the economic equation simple - more labor = more profits. To provide this labor, England's surplus poor (of which there was an overabundance) were sent to Virginia as indentured servants for a period of four to seven years in order to work off the costs of their relocation. Once their indenture period was over, they were free.....and poor. Over time, as established interests grabbed more and more of the land, opportunities for released bondsmen decrease, essentially creating an ever-growing class of destitute (and thoroughly despised) whites who threatened the social and political stability of the colony. Racial slavery was introduced over time to stem this proliferation of poor whites, who, after having served the term of their indenture, were free to be a "blight" on the community. These planter elites were also constantly at political war with a succession of governors appointed by the crown to manage the affairs of the colony in a manner most beneficial to the king. By enfranchising poor whites and enlisting their support for the colonial assembly, the elites were able to exercise political power over affairs of the colony in a manner most beneficial to the colonists, rich and poor alike. The result of these forces caused a major adjustment in white social strata - the role of detested poor who would only work under the threat of the lash was imposed upon enslaved blacks, and poor whites were elevated to the level of political partners with the elites. This simultaneously endowed all whites with a fierce sense of entitlement over their political rights and the prerogatives of power on the one hand, and contempt for their black slaves on the other. Liberty and equality came to be seen as inalienable birthrights while slavery was the means by which the "shiftless, lazy, indolent" poor could be transformed from burdens on society to positive (albeit brutally coerced) contributors. In other words, Virginia whites came to think of blacks with the same sense of scorn and contempt that English aristocrats held for the poor in England while, at the same time, assuming as a birthright the same sense of political entitlement enjoyed by the elite class in England. It was this, to our modern eyes, bizarre combination of egalitarian and tyrannical ideals that informed and inspired Jefferson, Washington and Madison (among others) as they participated in the formation of what would become the United States. The implication of this history on modern political discourse is obvious. Those who today passionately cite the liberty-loving ethos of the founding fathers while simultaneously exhibiting contempt for the poor are only looking at one side of the equation. For the Virginians, slavery and liberty went hand in hand; without the one there could not have been the other. A full, rich and nuanced understanding of our heritage compels us to recognize the human inclination to despise and exploit the powerless with the same vigor and passion that we celebrate the ennobling power of freedom. On a final note of criticism - while the book does a masterful job of making the origins of colonial racism comprehensible, it does so at the expense of "black experience" narratives. The story addresses issues of slavery only to the extent of discussing laws passed throughout the pre-revolutionary period in order to institutionalize it and the effect these laws had on the attitudes of whites towards blacks. I started the book expecting a far deeper dive in this area, and was disappointed by how little was presented concerning the evolution of slavery throughout the 17th century from a black perspective. After having read the book, I concede that this deeper dive was not strictly necessary in order for the author to prove his thesis, yet it would have been a stronger work had greater efforts in this area been made.
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Reviewed in the United States on February 23, 2013
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Reader KA
Lexington, US
★★★★★ 5
Great Historical Reading
Format: Paperback
I found "American Slavery, American Freedom" to be a thought-provoking book that contained a great deal of useful information. I wrote in the margins of the book, took notes, and highlighted entire pages. "American Slavery, American Freedom" was well-written and enjoyable to read. I had read countless books on slavery over the years. This book did not focus primarily on slavery. A detailed description of the steps and events that led to the creation of the Commonwealth of Virginia can be found in "American Slavery, American Freedom." The history of Virginia is characterized by slavery and servitude. Since many of the books I had read on slavery lacked a compelling backstory, I found this book refreshing. As far as I can tell, the author denied or downplayed the fact that Thomas Jefferson fathered many children with a slave named Sally Hemmings. The author probably worked on this book for years before its publication in 1975. There was a possibility that Edmund Morgan did not want to write about any "touchy" topics. "American Slavery, American Freedom" was a pleasure to read. I would recommend it to others.
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Reviewed in the United States on September 30, 2020

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