Arsip Mailing List Dokter Umum: Re: [Dokter Umum] Info tentang Bayam

Barangkali ini bisa memperjelas:
1. http://en.wikipedia.org/wiki/Spinach

Iron

Spinach is known as a rich source of iron and calcium. According to the
United States Department of Agriculture
<http://en.wikipedia.org/wiki/United_States_Department_of_Agriculture>,
a 180 gram serving of boiled spinach contains 6.43 mg of iron, whereas
one 6 oz. (170 gram) ground hamburger patty contains at most 4.42 mg.
Thus spinach does contain a relatively high level of iron, compared to
other vegetable and meat sources.^[3]
<http://en.wikipedia.org/wiki/Spinach#cite_note-2>

The iron in spinach is poorly absorbed by the body unless eaten with
vitamin C. The type of iron found in spinach is non-blood (non-heme), a
plant iron, which the body does not absorb as efficiently as blood
(heme) iron, found in meat.^[4]
<http://en.wikipedia.org/wiki/Spinach#cite_note-R000120-3>

The bioavailability of iron is dependent on its absorption. This is
influenced by a number of factors. Iron enters the body in two forms:
nonheme iron and heme iron. All of the iron in grains and vegetables,
and about three fifths of the iron in animal food sources (meats), is
nonheme iron. The much smaller remaining portion from meats is heme
iron.^[5] <http://en.wikipedia.org/wiki/Spinach#cite_note-Williams-4>

The larger portion of dietary iron (nonheme) is absorbed slowly in its
many food sources, including spinach. This absorption may vary widely
depending on the presence of binders such as fiber or enhancers, such as
vitamin C. Therefore, the body's absorption of non-heme iron can be
improved by consuming foods that are rich in vitamin C. However, spinach
contains iron absorption inhibiting substances, including high levels of
oxalate <http://en.wikipedia.org/wiki/Oxalate> which can bind to the
iron to form ferrous oxalate, which renders much of the iron in spinach
unusable by the body,^[6]
<http://en.wikipedia.org/wiki/Spinach#cite_note-5> In addition to
preventing absorption and use, high levels of oxalates remove iron from
the body.^[7] <http://en.wikipedia.org/wiki/Spinach#cite_note-6> But
some studies have found that the addition of oxalic acid to the diet may
improve iron absorption in rats over a diet with spinach with out
additional oxalic acid.^[8]
<http://en.wikipedia.org/wiki/Spinach#cite_note-7> However, foods such
as spinach that are high in oxalic acid can increase the risk of kidney
stones in some people.

2. Bayam: http://www.evergreenseeds.com/edambay.html

3. Meskipun spinach di golongkan dlm amaranthaceae belkakangan tetapi
formerly adalah Chenopodiaceae jadi keduanya jelas berbeda.

4. Gambar spinach bisa di buka di:
http://upload.wikimedia.org/wikipedia/commons/3/37/Spinacia_oleracea_Spinazie_bloeiend.jpg
Gambar bayam bisa di buka di:
http://ep.yimg.com/ip/I/evergreenseeds_2052_15465774

5. Baca juga posting saya sebelum ttg tanggapan topik ini mengenai:

*Amaranth greens*, also called *Chinese spinach*, *hinn choy* or *yin tsoi* yg adalah bayam bukan spinach.

Jadi dg demikian bayam masih bermanfaat dg zat besinya,m apalagi kalau
dibuat masakan dg jeruk nipis yg kaya dg vit C, maka penyerapan zat besi
bisa ditingkatkan.

Sallam,

melly liando wrote:
> Dear Astra,
>
> Saya dulu baca literatur itu dari text book pediatric, sewaktu saya coass, tahun 2000.
> Saya lupa text booknya.
> Tapi begini kejadiannya, waktu itu kita sedang discuss dengan konsulen.
> Konsulen tanya ke kita, apa saja sumber zat besi?
> Salah satu teman saya jawab : bayam.
> Lalu di suruhnya teman saya itu untuk ambil text book pediatric di perpustakaan.
> Lalu di suruh buka di halaman ttg zat besi.
> Ada statement :
>
> Spinach is one of ferum mineral source, but it was a decade ago.
>
> Jadi dulu memang benar dikatakan bayam adl sumber zat besi, tetapi dengan penemuan terbaru, hal itu tidak berlaku lagi.
>
> Lalu konsulen saya itu menjelaskan bahwa sumber zat besi bukan dari sayuran, sekalipun berwarna merah, tetapi berasal dari daging yang berwarna merah.
>
> Demikian penjelasan saya. Coba anda cek di text book pediatric terbaru atau di Nelson.
>
> Thanks.
>
> salam,
>
> Melyanti
> 0818 0868 1974
>
> --- On Wed, 5/27/09, Astrawinata G <astra.wg@gmail.com> wrote:
>
>
> From: Astrawinata G <astra.wg@gmail.com>
> Subject: RE: [Dokter Umum] Info tentang Bayam
> To: dokter_umum@yahoogroups.com
> Date: Wednesday, May 27, 2009, 1:57 AM
>
>
>
>
>
>
>
>
> Dear dr melly,
>
> Kemarin ada bilang "Based on literature terbaru, Zat besi atau Fe hanya di
> temukan di
>
>> bahan makanan yang berasal dari hewan, yaitu bagian yang megandung
>> butiran darah, seperti daging. Jadi hanya di daging yang berwarna merah.
>>
>> Zat besi TIDAK DITEMUKAN dalam bayam.
>>
>> Jadi tidak benar jika makan bayam ataupun sayuran lainnya yang
>> berwarna merah sekalipun, dapat meningkatkan intake zat besi atau
>> dapat meningkatkan jumlah sel darah merah !!!!!
>>
>> Hanya dengan mengkonsumsi daging berwarna merah saja (termasuk hati)
>> yang dapat meningkatkan intake zat besi dan juga dapat meningkatkan
>> sel darah merah dan berguna untuk salah satu terapi pasien anemia."
>>
>
> Boleh tau ga dok, literaturnya darimana?soalnya kami masih diajari kalo
> tumbuhan juga mengandung Fe, tapi karena terikat sama phytat xo
> penyerapannya kurang bagus daripada daging.
>
> Gimana dok?mohon bimbingannya.
>
> Best Regards,
>
> Astrawinata G
>
> [Non-text portions of this message have been removed]
>