Minggu, 13 November 2011

KHASIAT SAYUR BROKOLI

KHASIAT SAYUR BROKOLI


Akhir-akhir  ini sayur brokoli sedang  hangat-hangatnya dibicarakan oleh berbagai pihak, dan para ilmuwan terus meneliti kandungan dari sayur brokoli ini, yang kita ketahui bahwa sayur brokoli merupakan sayur jenis kubis-kubisan, dan  sayur brokoli  dengan kembang kol memiliki banyak persamaaan yaitu dalam suku kubis-kubisan atau Brassicaceae dari jenis Brasicca oleracea. Brokoli berasal dari daerah laut tengah dan sudah sejak masa Yunani Kuno dibudidayakan, dan masuk ke indonesia pada tahun 1970-an, kini sangat populer sebagai bahan pangan.

Hasil penelitian mengenai khasiat sayur brokoli dari para peneliti di  Roswell Park Cancer Institute di Buffalo, New York melaporkan hasil penelitianya di Washington pada (18/11/2008) dalam acara pertemuan asosiasi peneliti kanker dalam bidang pencegahan (American Association of Cancer Research meeting on cancer prevention), meminta kepada para yang beresiko kanker paru-paru untuk memperbanyak mengkomsumsi sayur-sayuran yang penting bagi tubuh, yaitu brokoli, bunga kol, kubis, lobak, karena di dalam sayuran tersebut terdapat komponen isothiocyanates bagian dari zat-zat phytonutrients. Kemampuan dari Phytonutrients ini dapat memberikan efek perlindungan atau perbaikan kesehatan pada tubuh manusia melalui cara, seperti; berperan sebagai antioksidan; memperbaiki respon sistem immune tubuh; memperbaiki komunikasi antar sel tubuh; mengubah metabolisme estrogen; merubah ke vitamin A (beta-carotene dimetabolisme ke vitamin A); dapat membunuh sel kanker (apoptosis); memperbaikin DNA yang rusak akibat asap rokok atau terpapar racun lainnya; menetralisir racun melalui pengaktifan cytocrome P450 dan sistem enzim fase II.

Pada bulan Februari, 2008. Dilakukan  tes laboratorium oleh peneliti lain yang menunjukkan bahwa isothiocyanates pada brokoli dapat membantu  mencegah kanker kandung kemih pada tikus.
Dan pada edisi April 2010, volume 32,  dipublikasikan dalam jurnal Clinical Therapeutic. Studi lain menunjukkan bahwa laki-laki yang mengkonsumsi brokoli   beberapa kali dalam seminggu memiliki risiko yang lebih kecil terkena kanker prostat daripada laki-laki yang tidak mengkonsumsi brokoli.

Zat phytonutrients yang berperan sebagai antioksidan ternyata anti oksidan mempunyai peran tersendiri  seperti  vitamin C, vitamin E, karotenoid, mineral selenium, hormon melatonin dan provitamin A. Dan ternyata  menurut pakar kecantikan mengenai vitamin A pada brokoli mengandung antioksidan yang lebih baik dibandingkan antioksidan yang dimiliki oleh vitamin C. Selain itu, manfaatnya pada peremajaan kulit sangat baik karena revitalisasi evitel vitamin A dapat menghambat dan memperlambat penuaan pada kulit.

Manfaat sayur brokoli yang disebutkan di atas sangat bermanfaat sekali untuk membangun kesehatan tubuh kita, namun yang sering menjadi masalah adalah ketidaktepatan dalam memilih jenis brokoli yang baik dan cara penyajian brokoli yang baik dalam penyajian menu makan, maka dari itu perlu kita mengetahui bahwa brokoli yang baik adalah brokoli yang  memiliki warna yang hijau tua, karena warna ini menunjukkan nilai nutrisi yang tinggi.  Bunga brokoli yang berwarna hijau tua, atau agak keunguan mengandung lebih banyak beta-karoten dan vitamin C daripada yang warnanya lebih pucat.  Dan memilih brokoli yang memiliki batang yang keras. Batang yang keras menunjukkan kualitas yang bagus, serta dalam penyajian brokoli sebaiknya dikukus, masak dengan microwave atau ditumis dengan sedikit kaldu atau air, karena cara ini lebih baik dibandingkan dengan merebus yang akan menghilangkan kandungan beberapa vitamin dan mineral. Dan dalam penelitian  yang dikemukakan  oleh para peneliti di  Roswell Park Cancer Institute di Buffalo bahkan  menjelaskan cara mengkonsumsi sayuran ini dalam keadaan mentah lebih baik, karena akibat dari pemanasan dapat merusak enzim dalam sayuran yang berfungsi mengaktifkan isothiocyanates.

Sumber : Kumpulan Dari Berbagai Sumber di journal

 

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