[ASK] Seputar Wortel dan Penglihatan

[Predator]

anda bener ...

OOT sebenetar, apakah benar untuk point ini juga (?) :

(dari sumber ya g sama)
While it can cause odd skin coloration, one thing eating large amounts of carrots won’t do is improve your eyesight, at least assuming you’re not malnourished.  If you are malnourished, it may improve your vision.  Specifically, if you aren’t getting enough Vitamin-A, eating carrots (because of the beta-carotene that your body converts to Vitamin-A as it needs it) can improve your eyesight and night vision. However, the fact is that most people in the developed world get plenty of Vitamin-A because it’s in an awful lot of foods, such as: pretty much all dairy products, eggs, peas, pumpkin, broccoli, cantaloupe, spinach, sweet potatoes, papayas, lettuce, mangoes, cucumbers, peaches, pineapples, tomatoes, yellow corn, and many, many more. Further, because excessive amounts of Vitamin-A won’t improve vision any more than adequate amounts will get your vision at and because Beta-Carotene won’t be turned into Vitamin-A in your body if you’ve already got enough Vitamin-A (which is good because too much Vitamin-A can be toxic), eating carrots won’t usually do anything for your vision at all.

The myth that carrots can improve your eyesight beyond normal, particularly that carrots can improve night vision, was popularized by British propaganda during WWII.  British gunners in WWII were able to locate and shoot down German planes at night due to significant advancements in radar technology during WWII.  To help cover up this fact, the British spread about an urban legend that said that they were able to increase the night vision of their pilots by having them consume large amounts of carrots.  This propaganda campaign included stories about certain pilots like Lieutenant John “Cat Eyes” Cunningham who they said had exceptional night vision thanks to a habit of eating large amounts of carrots.  This lie not only gave birth to an urban legend, but also caused many British people to start planting their own vegetable gardens, including planting and eating a large amount of carrots in order that they’d be able to see better during blackouts.

[Predator]

gw pindahin ke sini ya

Lanjut!! monggo di sharing pengetahuannya

sumber diatas berasal dari : http://www.todayifoundout.com/index.php/2012/02/if-you-eat-an-excessive-amount-of-carrots-your-skin-will-turn-an-orangishyellow-shade/

[Forte]

memang benar konsumsi vitamin A dan wortel berlebihan justru tidak berguna.. konsumsi saja secukupnya jika memang membutuhkan asupan Vitamin A. Mitos ini berkembang pas era perang dunia II. Dan ini saya copas yang lebih menarik

Carrots, carotene and seeing in the dark
Wayne Smith FAFPHM,1 Paul Mitchell FRACO2 and Ross Lazarus FAFPHM3
1National Centre for Epidemiology and Population Health, Australian National University, Canberra, ACT, 2Department of Ophthalmology and 3Faculty of Medicine, University of Sydney, Sydney, New South Wales, Australia

Abstract nya

Should older people eat more carrots, or at least increase their carotene intake to prevent loss of night vision? Participants in the Blue Mountains Eye Study were asked about their ability to see in the dark. Nutrient and food intake were estimated from a food frequency questionnaire. Associations between self-reported poor night vision and estimated nutrient intake were investigated using logistic regression. Poor night vision among women was associated with higher beta-carotene (P for trend=0.03) and total vitamin A intake (P for trend = 0.048). Increased consumption of carrots, but no other food high in beta-carotene, was asso- ciated with significant increased reporting of poor night vision among women (P for trend = 0.04). While carrot intake may protect against difficulty in seeing at night, it is probable that people attributing poor driving ability to their vision may be eating more carrots in the hope of reversing this decline.

Result
Table 1 shows that self-reported poor night vision among women was associated with higher intakes of beta-carotene (P for trend = 0.03) and total vitamin A (P for trend = 0.048). However, no associations between night vision and either
beta-carotene or vitamin A intake were apparent for men. Retinol intake was not found to be associated with poor night vision in women, but a borderline significant protec- tive association was apparent for men, with an odds ratio of 0.55 (0.29–1.02) for intakes greater than the lowest quintile for retinol.

Table 2 shows associations between self-reported poor night vision and consumption of a number of foods with high carotene content. No foods apart from carrots were associated with poor night vision among either men or women. In women, increased intake of carrots was associ- ated with significant increased reporting of poor night vision (P for trend = 0.04).
Reports of poor night vision were not associated with intake of dietary supplements containing either carotene or vitamin A: age- and sex-adjusted odds ratios 0.94 (0.61–1.45) and 1.00 (0.56–1.75), respectively. The associa- tions between poor night vision and nutrient intake remain approximately the same after adjusting for supplement use.
None of the associations between reports of poor night vision and nutrient intakes was substantially altered after adjusting for the presence of degenerative eye diseases.

kalau doyan journal bisa lirik ke sini, kebetulan karena udah lama jadi bisa dapat jurnalnya :

http://onlinelibrary.wiley.com/store/10.1046/j.1440-1606.1999.00187.x/asset/j.1440-1606.1999.00187.x.pdf;jsessionid=E04E61E42F261D900B6C0C4B7A3D1B6A.f01t02?v=1&t=hpul9ymk&s=7520be6a73efa2bd453abe1bcaf2c5460ddc0615