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Prawn/ Shrimp + Vitamin C = Deadly?

February 3rd, 2009 | 2,478 views | Posted in Health | 20 Comments »

I just got this post from my friend’s mailing list about a woman died in Manado, Indonesia poisoned by eating prawn soon after taken Vitamin C tablet. The blood comes out from the nose, ears, and mouth of this poor woman.

This woman has a habit consuming Vitamin C every day, it is alright, no problem with that. Eating prawn is alright too, it’s good for your body, very high in protein.
The problem was she ate prawns after taken Vitamin C tablet at the night she died.

Prawns/ Shrimps contain Arsenic Pentoxide (As2O5), and when mixed with Vitamin C, there will be a chemical reaction in the stomach and transforming Arsenic Pentoxide (As2O5) into Arsenic Trioxide (As2O3), which is very poisonous and caused her death from multi-system organ failure.

This is honestly the first time I heard about prawns and Vitamin C poisoning, it’s better to check with your health practitioner.

updated: I myself have eaten lots of prawns and lobsters with orange juice. I am bloody fine.  I believe it’s not because of the prawns but the arsenic found in the river where the prawns caught. The rivers in South East Asia countris usually poisonus, many factories throw their wastes in the rivers.



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20 Responses to “Prawn/ Shrimp + Vitamin C = Deadly?”

  1. I’ve read about this article years ago, but I couldn’t remember which book. If you ever heard about Munir’s death (Indonesian Human Right Watch activist), and put any conspiration theory aside, could this be the cause of his death? Maybe…..

  2. this is a hoax!!! Stop circulating this rumor!

  3. Not true! You need to eat 50 Kilo of polluted shrimp to reach that high dose. At this level, either Arsenic Pentoxide or Arsenic Trioxide are toxic to body.

  4. Emil Donque Says:

    To the the health experts, please provide an official comment the reality on this poisonous chemical reaction. Thank you for your cooperation.

  5. NOT TRUE! Please Don’t always believe a story just because someone said so. Do a little research and verify if the source is reliable. Doing that, you will see the truth.

  6. bob elliot Says:
  7. Ascorbic acid does a lot of things inside and outside the body. It boosts the immune system, protects the cells from free radical damage and it also smooths out the texture of the skin when used topically.

  8. Arsenic pentoxide (AsO5) is similar if not more toxic than Arsenic trioxide (AsO3). AsO5 is rated NFPA 704 blue level 4 and AsO3 is rated NFPA 704 blue level 3.

    So what’s the problem the vitamin c is causing here?

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  15. Nalliah Thayabharan Says:

    Shrimp, Vitamin C & Arsenic poisoning

    Marine organisms normally contain arsenic residues ranging from < 1 to more than 100 mg/kg, predominantly as organic arsenic species such as arsenosugars (macroalgae) and arsenobetaine (invertebrates and fish). Bioaccumulation of organic arsenic compounds, after their biogenesis from inorganic forms, occurs in aquatic organisms. Bioconcentration factors in freshwater invertebrates and fish for arsenic compounds are lower than for marine organisms. Biomagnification in aquatic food chains has not been observed. Background arsenic concentrations in freshwater and terrestrial biota are usually less than 1 mg/kg (fresh weight).

    With the exception of fish, most foods contain less than 0.25 µg/g arsenic. Many species of fish contain between 1 and 10 µg/g. Arsenic levels at or above 100 µg/g have been found in bottom feeders and shellfish. Both lipid- and water-soluble organoarsenic compounds have been found but the water-soluble forms constitute the larger portion of the total arsenic content. The nature of these compounds has been shown to be mainly of the quaternary arsonium type. As was mentioned above, arsenobetaine is believed to be the most predominant species, but recent Canadian results demonstrated a higher level of arsenocholine than arsenobetaine in shrimps.

    Vitamin C or L-ascorbic acid or L-ascorbate is an essential nutrient for humans and certain other animal species. In living organisms ascorbate acts as an antioxidant by protecting the body against oxidative stress. It is also a cofactor in at least eight enzymatic reactions including several collagen synthesis reactions that, when dysfunctional, cause the most severe symptoms of scurvy. In animals these reactions are especially important in wound-healing and in preventing bleeding from capillaries.

    Ascorbate (an ion of ascorbic acid) is required for a range of essential metabolic reactions in all animals and plants. It is made internally by almost all organisms although notable mammalian group exceptions are most or all of the order chiroptera (bats), guinea pigs, capybaras, and one of the two major primate suborders, the Anthropoidea (Haplorrhini) (tarsiers, monkeys and apes, including human beings). Ascorbic acid is also not synthesized by some species of birds and fish. All species that do not synthesize ascorbate require it in the diet. Deficiency in this vitamin causes the disease scurvy in humans. It is also widely used as a food additive.

    Although there is no compelling evidence that vitamin C has antitumor activity in humans, clinical trials are testing the hypothesis that ascorbic acid will enhance the efficacy of arsenic trioxide (As2O3) in myeloma. In vitro, ascorbic acid cytotoxicity depends on its interaction with free transition metal ions in culture media leading to the generation of H2O2 and other reactive oxygen species. To circumvent the extracellular in vitro pro-oxidant effects of ascorbic acid, HL60, U266, and RPMI-8226 cells are loaded with vitamin C by incubation with dehydroascorbic acid. Loading cells in this manner resulted in prominent, dose-dependent protection of As2O3-treated cells as measured by viability, colony formation, and apoptosis assays. Glutathione depletion enhanced cell sensitivity to the cytotoxic effects of As2O3 and vitamin C loading provided protection. Ascorbic acid was found to generate cytotoxic concentrations of H2O2 in culture medium without cells and copper/iron chelators inhibited this reaction. However, ascorbic acid did not generate H2O2 in simple buffer or human plasma. Direct incubation with ascorbic acid resulted in increased intracellular reactive oxygen species , whereas dehydroascorbic acid incubation decreased it. These results clarify an apparent paradox and indicate that vitamin C loading in HL60, U266, and RPMI-8226 cells ameliorates As2O3 cytotoxicity.

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