Once radiopharmaceuticals enter the body and travel to an organ, they begin to interact with the processes of that organ. The radioactivity is picked up by cameras or computers and used to map the process. For example, an ultrasound can show an image of an organ and reveal if a tumor or other abnormality is present. Nuclear medicine can show how the process of glucose metabolism is functioning in the organ.
250g bags of our biltong can last up to 4-months, and we have food testing certificates to prove this, however, we do not advise that you keep it that long. The larger the bag of biltong, i.e 500g or 1kg, the more moisture is contained within the sealed bag.
Loose green tea is a perishable product. The rule of thumb is that green tea turns hay after 6 months. If you want to keep it fresh - keep it in the cooler (4-5C/40F) in zip-locked package. Green tea easily absorbs any flavors, so if you don't want your lovely Bi Luo Chun smell like salami, keep it zipped. The only exception to 6 months expiration is vacuum. If you vacuum your green tea and put it in the fridge you can prolong its life for as long as 2-3 years. All of the above is true for good quality tea carefully produced by responsible farmers.