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Sunday 9 July 2017

What Colour Red Meat Should Be?

Beef Colour and Food Safety
by Jim Chan, Public Health Inspector (Retired)


(photo by Richard Yang)
When purchasing packaged fresh beef in a food store or supermarket, make sure the package is cold and the meat is firm. Inspect the packaging to ensure it is in good condition and should not have holes in the wrapping material. Also check the packaging date or the best before date  (or use by date) to ensure getting freshly packaged beef. 

Good quality beef should have a rich, vibrant, reddish colour (photo right) but packaged beef  can sometimes turn from red to an un-appetising bluish-red or greyish colour.

When off-colour meat products such as steaks, roasts and ground beef are left in the store or supermarket refrigerator, sometimes customers would complain to public health department about store selling "bad" meat.

No need to worry as discolouration of beef indicates a lack of exposure to oxygen due to the packaging. The beef will change to a brighter red colour (photo below) once it is removed from the packaging and expose to air. 





What causes beef to change colour? Has it gone bad?


(photo by Erika Bartels)
Beef, especially ground beef often undergo discolouration prior to spoilage but still safe to eat after cooking to a safe internal temperature 71°C (160°F). Beef contains a pigment in the muscle tissues called Myoglobin and this pigment is normally a dark greyish-purple colour.


After cutting or slicing, the beef comes into contact with oxygen and turns myoglobin into
oxy-myoglobin through oxidation. Oxy-myoglobin is a deep red colour pigment that gives beef the supermarket "fresh red meat look". 

When freshly cut or ground beef is packed into an air tight package or vacuumed bag, the beef can turn into a greyish colour when deprived of oxygen, especially when kept in the package for a few days. Problem is, consumers do not find greyish colour beef very appetising as they often associate greyish colour as spoilage and off-colour meat as rotten meat. So for the purpose of merchandising, the store often infused meat packaging or bag with oxygen or other gases (nitrogen, carbon dioxide) to prevent discolouration of beef (photo below). 


Is the off-colour beef still safe to eat or should you throw it out?  

(photo by Erika Bartels)
Even if there is a colour change in the beef, which might not be as visually appetising but the meat is still fine to eat. However, make sure the beef is stored properly in the refrigerator or freezer and consumed within a short period of time. Always cook meat to a safe internal temperature, especially for ground beef items such as burger and meat loaf that should be cooked to an internal temperature of 71°C (160°F) (Safe cooking temperatures). 


However, if the package of beef is off-colour all the way through and does not turn red when exposed to air within fifteen to twenty minutes, it is most likely spoiled and can increase the risk of food poisoning. Also, spoiled beef usually has a sulphurous or foul smell and often with a slimy surface and should be tossed


Food Safety - BBQ and Grilling 
(link)

Safe cooking temperature of meat 
(Video)

Food safety at home by Dr. Justin Beaver
 (Video)

Related links

BBQ Food Safety

Food Safety - Ground Beef, USDA

Gas mixtures help preserve the quality of packaged meat

Color of Meat and Poultry - USDA Food Safety

Meat Packaging

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  29. Herbs are Natural good remedies for All deadly diseases AND PENIS ENLARGEMENT , the reason why most people are finding it difficult to get a bigger and Erect Penis is because they believe on medical report, drugs and medical treatment, which is not helpful to Enlarge or Erect Penis I am from South Africa, I had Cancer and was told I could die in few Months before I met this Doc ARIBA on the internet, I contacted via email (draribaspelltemple@gmail.com) and he told me to come over to China, I did go to china to meet him up.. I used these herbs and got cancer cured in 3 Weeks, If you need medicine for HIV/AIDs and other deadly diseases you contact him and get cured. CONTACT: draribaspelltemple@gmail.com OR WhatsApp: +2349034093028

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  31. Does anyone still doubt natural herbs? I have seen the great importance of natural herbs and the wonderful work they have done in people's lives. I wonder why people still spend their money on English medicine when natural herbs can cure all kinds of mental diseases. I have seen it with my own eyes. My dad and aunt were cured from Huntington disease with Dr Bharet herbal medicine. He used BUJA herbal medicine to cure my dad and aunt from Huntington disease, I know it is hard to believe but am a living testimony. My dad was diagnosed with Huntington's disease in 2016, we have made use of all western medication yet no improvement and his doctors said there is no cure yet but still carrying out research, my dad experienced depression, anxiety and memory lapses that made him hallucinate always, he speaks to himself often and that made me shed tears each night that passes by. 2019 I searched through the internet for a solution and i came across a comment on a blog written by [George Lisa] saying she was cured of Huntington disease that she suffered from for 8years. Without wasting time I quickly contacted Dr Bharat whose name was mentioned in the comment Via his email. He asked me questions which I answered correctly he sent his herbal medicine to us here in Ireland through DHL, in less than one month I started seeing positive improvement on my Dad's health so I introduced the medication to my aunt as well, is been 4 years now, my dad and aunt are living their best life again. Though i gave the medication as i was instructed. My dad and aunt are Huntington disease negative after the medication, Huntington disease is completely gone from my family lineage. With Bharat herbal medicine called BUJA Huntington patients can smile again. For those with Huntington disease or having their love ones diagnosed with Huntington's disease contact Dr Bharat now via dr.bharatkings@gmail.com you will come back to testify

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  33. Read carefully, it's said that Huntington disease has no cure, yes with the western medication but not with herbal medicine, my daughter's situation made me to realize that with doctor Bharat herbal medicine it can be cured.. In 2014 she experienced difficulty in concentrating, memory lapses and depression, at first I thought it was stressed from her place of work until I took her to hospital and the doctor made me to understand that it's juvenile Huntington disease because she is still in her late 20s, which she inherited from my late husband that died of the same disease, the doctor told me it has no cure, but gave her some medicine which I noticed that it has side effects, my daughter situation got worst each day that passes, she was the best at her place of work, now a shadow of her self because of this deadly disease, she speaks to herself often, she was really going insane, I do not want to lose my daughter the same way I lost her father, in 2018 I carried out research on internet and bumped into a comment of a lady that got cured of Huntington disease, without wasting time I contacted doctor Bharat whose name was mentioned in the comment, now is been 3 years my daughter is living her best life again, for those that have the disease or have any love one suffering from Huntington disease, contact doctor Bharat via dr.bharatkings@gmail.com

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