Viete, ktorý olej si vybrať?

Ponuka rastlinných olejov je v súčasnosti dosť široká a vybrať si ten správny olej je niekedy zložitejšie ako sa zdá. Aké sú výhody repkového oleja v porovnaní s inými olejmi?

Nielen o tom sme sa porozprávali s riaditeľom Ústavu potravinárstva a výživy na Fakulte chemickej a potravinárskej technológie STU, prof. Ing. Štefanom Schmidtom, PhD.

Repkový olej – zlatý olej
Repkový olej je výrobok, ktorý v sebe spája mnoho pozitívnych vlastností. Je lacný, ľahko dostupný, má široké použitie v kuchyni aj v kozmetike. Navyše má prospešné zloženie mastných kyselín v porovnaní s inými obľúbenými olejmi. To znamená, že má najmenej škodlivých nasýtených mastných kyselín a veľa esenciálnych nenasýtených mastných kyselín zo skupiny Omega . Taktiež je bohatým zdrojom rastlinných sterolov a zdraviu prospešných vitamínov: vitamínu E, ktorá pomáha pri ochrane buniek pred oxidačným stresom a vitamínu K, ktorý okrem iného vplýva na správnu zrážanlivosť krvi.

Slnečnicový olej – hlavná konkurencia

Repkový olej sa najčastejšie porovnáva so slnečnicovým olejom. Mnohí považujú oba oleje za rovnako vhodné na používanie pri vysokých teplotách. Repkový olej má o niečo vyšší bod zadymenia (teda teplotu, pri ktorej je odolný voči znehodnoteniu, a to dokonca až 242°C) . Teplota zadymenia slnečnicového oleja je 240 °C. Ako vidíme, tieto teploty sú porovnateľné . Avšak to, čím sa repkový olej odlišuje od toho slnečnicového je pomer Omega-6 a Omega-3 mastných kyselín. Nakoľko sa slnečnicový olej odlišuje vysokým obsahom Omega-6 mastných kyselín, čo má v kombinácii s malým obsahom Omega-3 vplyv na nesprávny pomer medzi týmito dvoma zložkami. Pomer medzi Omega-6 a Omega-3 je v tom oleji vyšší ako 136:1, táto hodnota sa značne vzďaľuje od pomeru 2:1, ktorý odporúčajú odborníci na výživu. Práve repkový olej sa vyznačuje týmto ideálnym pomerom nenasýtených mastných kyselín, ktorý sa z hľadiska výživy človeka považuje za optimálny . Pri porovnávaní týchto olejov nezabúdajme, že repkový olej je tuk, ktorý si najdlhšie zachováva čerstvosť spomedzi kuchynských tukov dostupných na trhu. A vďaka stabilite je repkový olej odolný voči zatuchnutiu a vysokej teplote. Stabilita repkového oleja vyplýva z jeho zloženia. Tento olej o.i. obsahuje veľké množstvo antioxidantov, takzvaných tokoferolov (vitamín E), jedným z najviac zastúpených v jeho zložení je brassikasterol, charakteristický len pre repku olejnú. Vďaka tomu je prírodne odolnejší .

Kokosový – naozaj správna voľba?

Kokosový olej pred časom získal aj u nás veľkú popularitu a predčil tak mnohé tradičné rastlinné oleje. Mnohí odborníci však upozorňujú na jeho vysoký obsah nezdravých nasýtených mastných kyselín – podľa zdravotnej organizácie EFSA sa zníženie konzumácie nasýtených tukov pričiňuje k udržiavaniu správnej hladiny cholesterolu v krvi. Medzi ďalšie mastné kyseliny v kokosom oleji patrí najmä kyselina olejová zo skupiny mononasýtených mastných kyselín tzv. Omega-9. Kokosový olej obsahuje 1,7 g polynasýtených mastných kyselín v 100 g, čo sú 2% všetkých mastných kyselín. Najmä kyselina linolová zo skupiny Omega-6 a stopové množstvo kyseliny α-linolenovej Omega-3 dôležitej z hľadiska výživy– len 0,02 g v 100 g oleja . Pre porovnanie, repkový olej obsahuje najmenej nasýtených mastných kyselín spomedzi všetkých rastlinných olejov . „Repkový olej má dokonalé zloženie Omega-3 mastných kyselín nedostatkových v našej strave,“ dodáva odborník. Je bohatý na polynasýtené mastné kyseliny – ALA zo skupiny Omega-3 a LA zo skupiny Omega-6, ktoré sú potrebné pre správny rast a vývoj detí (pozitívne výsledky pri dennej konzumácii 2 g ALA a 10 g LA). Kokosový olej okrem tuku obsahuje stopové množstvo vápnika, železa, zinku, vitamínu E a vitamínu K. Tento olej dodáva aj stopové množstvo fytosterolov – 86 mg v 100 g oleja .

Palmový olej

Palmový olej konzumujeme v mnohých výrobkoch, ako sušienky, čokoládové výrobky, či nátierky a to bez toho aby sme si to vôbec uvedomili. Palmový olej totiž patrí medzi najlacnejšie rastlinné oleje. Podobne ako kokosový olej obsahuje veľké množstvo nezdravých nasýtených mastných kyselín – nakoľko zvyšujú hladinu cholesterolu v krvi, preto odborníci varujú pred konzumáciou príliš veľkého množstva týchto olejov . Spomedzi rastlinných olejov si radšej vyberte tie s optimálnym obsahom nenasýtených mastných kyselín. Repkový olej sa vyznačuje najvýhodnejším zložením nenasýtených mastných kyselín Omega-6 a Omega-3, ktoré sa v ňom nachádzajú v ideálnom pomere, t.j.2:1.

oleje 120516

Olivový olej je často považovaný za jeden z lepších rastlinných olejov. Málokto však vie, že repka olejná je označovaná aj ako „oliva zo severu“, vzhľadom na vysoký obsah kyseliny olejovej, ktorý sa blíži k hodnote v olivovom oleji . Mnohí považujú olivový olej za skvelý doplnok v studenej kuchyni, zatiaľ čo repkový olej je zaškatuľkovaný ako olej výhradne na vyprážanie. Prof. Ing. Štefan Schmidt však bez problémov označuje repkový olej za vhodný na studenú kuchyňu: „Repkový olej sa hodí do studenej kuchyne vďaka svojim senzorickým vlastnostiam. Naviac má veľmi kvalitné zloženie tzv. sprievodných látok, predovšetkým v tuku rozpustných vitamínov, fytosterolov, karotenoidov a antioxidantov.“
Jedným z populárnych mýtov o repkovom oleji je jeho údajná pachuť, či nepríjemná vôňa. „Už dlhší čas má rafinovaný repkový olej neutrálnu chuť a vôňu,“ vysvetľuje odborník.

Vďaka svojej odolnosti, ktoré odzrkadľuje vysoká teplota zadymenia, nestráca na svojom unikátnom zložení nenasýtených mastných kyselín. Navyše, napriek vysokému obsahu nestálych Omega-3 mastných kyselín, je odolný proti skazeniu – častice Omega-3 (kyselina linolová) sú v ňom umiestnené v strede častíc triacyglycerolu, vďaka čomu sú odolné a chránené pred vonkajšími vplyvmi . Zároveň sa vďaka svojej neutrálnej chuti a vôni skvele hodí do studenej kuchyne. Repkový olej je zaznávaným rastlinným olejom, ktorý však v mnohých ohľadoch predčí aj iné, niekedy omnoho populárnejšie oleje.

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  • Komentár best steroids for muscle gain without side effects %PM, %19 %783 %2025 %17:%mar napísal best steroids for muscle gain without side effects

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    This article will discuss which muscle teams individuals can work out together and supply an example exercise schedule.

    This degree of volume will work for you for the primary several months of
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