I was told that eating foods that has been cooked, frozen (or
refrigerated) and re-heated repeatedly (say, 2-3 times) is not good
for your health.
Please tell me why and give supporting evidence if any.

Dear PPangja, 

The main reason, is, as Probonopublico has commented, the risk of food
poisoning. Bacteria could develop in food that is cooled and
re-heated: "Not all harmful bacteria are killed by cooking. After
cooking, these remaining bacteria can grow rapidly both when the food
is cooling and when it is being re-heated. Further, the food may be
re-contaminated after cooking. Therefore, food should reach at least
74? C (165? F) when you re-heat it. Again, make sure this temperature
is reached by using a meat thermometer.

Do not reheat your leftovers more than once!" 
(SOURCE: BC Helath Guide, Ten Easy Steps to Make Food Safe
<http://www.bchealthguide.org/healthfiles/hfile59.stm>).

I hope this answered your question. Please contact me if you need any
clarification on this answer before you rate it.

Search terms: 
reheating food health "more than once'

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Request for Answer Clarification by ppangja-ga on 15 Nov 2004 13:54 PST

Thank you politicalguru.
Could you clarify what a meat thermometer is and how to use it?

PPangja

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Clarification of Answer by politicalguru-ga on 15 Nov 2004 15:29 PST

Dear Ppangja, 

A meat thermometer is a thermometer that could check the temprature
inside the meat (or any other loaf). You stick it inside the meat, and
get the results.

Meat Thermometer - explanation from Fight Bac
<http://www.fightbac.org/howhot.cfm> 

e-How - How to use a meat thermometer
<http://www.ehow.com/how_12322_meat-thermometer.html> 

Froogle results to buy a meat thermometer: 
<http://froogle.google.com/froogle?q=%22meat+thermometer%22&num=50&hl=en&lr=&c2coff=1&sa=N&tab=wf>

Excellent. I learned even more than I asked.

That advice is commonplace.

I believe that there is a risk that such action can cause
contamination and food poisoning.

Don't do it!

Thank you for the rating!