when a person whose blood group b+ drinks coffe frequently can he/she lose antigen?

Question

coffe beans contain enzyme that can help disolving b+ antigen.coffe is refined and prepared from coffe beans.so, i am asking the question.

Answer 1

The coffee that you drink has been extensively processed and thus doesn't have too much of the glycosidase enzymes that degrade the sugar groups present on the surface of RBCs.
Secondly, when you take coffee, it goes into your stomach and most of the protein part gets denatured and broken down to amino acids which then get absorbed.
Thus even if the enzyme that cleaves the sugars present on RBCs is present it will be denatured by the time it reaches the blood.
The conversion to O group might happen if you inject yourself with good amounts of the enzyme, however since you are genetically B, the new RBCs formed will invariably be B always.

Answer 2

The A and B antigens, which give blood groups their name, are sugars carried on the surface of red blood cells. Human red blood cells can carry one of these antigens, both, or neither; giving four blood groups: A, B, AB and O, respectively. Receiving mismatched blood can cause a life-threatening reaction, and errors are made in 1 in every 15,000 transfusions, on average.

In the 1980s, a team in New York, US, showed that an enzyme from green coffee beans could remove the B antigen from red blood cells. It proved too inefficient for practical use, but Henrik Clausen at the University of Copenhagen in Denmark and colleagues have now screened bacteria and fungi for more powerful enzymes. "The diversity you get in the bacterial kingdom is much higher," Clausen explains.

The researchers homed in on two enzymes. One, from a gut bacterium called Bacteroides fragilis, removes the B antigen. The other, from Elizabethkingia meningosepticum – which causes opportunistic infections in people – targets the A antigen. The purified enzymes are highly efficient. For example, the B. fragilis enzyme is used up at only one-thousandth the rate of the coffee bean enzyme.

Clausen's team is working with a company called ZymeQuest in Beverly, Massachusetts, US, which plans clinical trials to test whether the treated blood is safe and effective. If so, the technology should be in hot demand, because group O blood – the only safe option if there is any doubt about the recipient's blood group – is a precious commodity.

Answer 3

Right, the coffee is going to change your genetic structure. Just be careful. One cup too many and you'll turn into a frog. Or perhaps there's a tiny difference between "in vivo" and "in vitro."

Answer 4

I am B+ . I take six cups of coffee daily. I have been doing it for a long time. I am still B+.

Answer 5

No