is there any produce that can supply vitamin b12 that is equally good enough to compare with that you find..?!

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Nutritional yeast

There are no plants that provide B12. Simple fact. Who says so? Vegan Health, Vegan Society, VRG ALL say you need to supplement your vegan diet for B12. You can take pills, shots or eat highly processed fortified foods, but you need to supplement for B12 since it's not a natural part of a vegan diet.

I'd recommend getting B12 the natural way: through your diet. I think it's pretty obvious that your body uses nutrients better from natural foods than from manufactured supplements, so I'd recommend beef over a pill.

Oh, if you go with nutritional yeast, be sure it contains B12. Not all nutritional yeasts do. See Wikie link below. Apparently nutritional yeasts have to be supplemented with B12, too!

From VeganHealth: --"B12 is generally found in all animal foods (except honey). Contrary to rumors, there are no reliable, unfortified plant sources of vitamin B12, including tempeh, seaweeds, and organic produce. The overwhelming consensus in the mainstream nutrition community, as well as among vegan health professionals, is that plant foods do not provide vitamin B12, and fortified foods or supplements are necessary for the optimal health of vegans, and even vegetarians in many cases..."--

http://www.veganhealth.org/articles/vita…

http://en.wikipedia.org/wiki/Nutritional…

If a patient had a B12 deficiency, you would not prescribe beef. Most deficiencies in B12 are due to the fact that a patient cannot digest it out of their food, due to changes as we age, or a lack of intrinsic factor (pernicious anemia). Prescribing beef would be malpractice. If you're lucky, there are only a couple micrograms in a quarter pound of ground beef. Even a half pound of top sirloin steak has about 3.7mcg. That's not going to cut it for treating a deficiency, even if you isolated it. When you get up into your 50's and beyond, doctors also often recommend a supplement.

Vitamin B12 does not come directly from plants or animals. It's the only known vitamin to be produced in nature exclusively by microorganisms-- bacteria. It ends up in animal products because they digest it. The diet of your beef cow is supplemented with cobalt to make up for potential vitamin B12 deficiencies in their own bodies. Cobalt helps the bacteria in their guts produce vitamin B12. You can contact any university to see that's the truth. Because of modern agricultural methods, hygiene, water treatment, and modern living, we're not out picking up the small amount of vitamin B12 anywhere except in the animal tissue or other products that are delivered to the grocery store. It may be here and there, but there is no other reliable source from food at your grocery store unless it's fortified, similar to the way that milk is fortified with artificial vitamin D, cereals are fortified, salt is iodized, and many other products have nutrition added for meat eaters too.
Supplements use microorganisms to produce the B12, unless there are other ingredients listed, such as dessicated liver. Vitamin B12 mostly stores in the liver of animals-- including us. There's B12 in other animal products like milk-- a little over a microgram per cup. Most strict vegetarians or vegans will add B12 to the diet to make sure they're getting it directly from the bacteria. There's fortified food, food items like inactive nutritional yeast, http://www.cosmosveganshoppe.com/Merchan… and supplements. I prefer to use a small vitamin B12 supplement daily.

The thumbs-downers may not like that a doctor will not prescribe beef to treat a vitamin B12 deficiency anemia, but it's true. They may recommend dietary changes, but they will treat a deficiency with supplements or injection. You cannot treat a deficiency without knowing the cause, or with just a few micrograms of B12.

Education.
Experience. My own mother is vitamin B12 deficient. She has eaten meat every day of her adult life.

Cobalamin, or "vitamin B12" is actually alpha-(5,6-dimethylbenzimidazolyl)cobami…

"Ultimately, animals must obtain vitamin B12 directly or indirectly from bacteria, and these bacteria may inhabit a section of the gut which is posterior to the section where B12 is absorbed. Thus, herbivorous animals must either obtain B12 from bacteria in their rumens, or (if fermenting plant material in the hindgut) by reingestion of cecotrope f?ces."

(translation; you have two choices, eat cow meat, or eat cow poop)

I don't think there are any fruit or vegetables that are rich in vitamin B12 but foods are often fortified with it like breakfast cereal and marmite is as well. Other than that I think maybe a vitamin B complex supplement?

http://hcd2.bupa.co.uk/fact_sheets/html/…