Nutrition & Health

UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Colorful Canning Jars are Not Always for Canning

May 7, 2026
Some eye-catching canning jars are inappropriate for food preservation.  If you’ve been travelling the aisles at the local crafts store or shopping online for canning supplies, you may have come across some eye-catching canning jars in vivid colors, including red, cobalt, amethyst and even black. They…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Fill Them While They're Hot!

May 7, 2026
Canning Basics: Make sure your canning jars start hot and stay hot Canning jars should always be washed and rinsed well before being used. And while they don’t always need to be sterilized (unless the processing time is less than 10 minutes), the jars do need to be hot when filled with food, and kept…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Common Myths and Conceptions about Canning Jars & Lids

May 7, 2026
Canning Basics: Mason jar myths are rampant on the internet!  MYTH:  Brand new canning jars fresh out of the box are sterile and do not need to be washed. New jars are not sterile. Before use they should be checked for breakage or manufacturing defects, and then washed. In fact, jars should always…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Not Everything on the Internet About Mason Jars is True

May 7, 2026
Canning Basics: Busting more Mason jar myths MYTH:  Canning jars can be sterilized in the oven.  Canning jars can even be used for baking.  No and no. Canning jars are made from annealed glass and are not designed for the dry, fluctuating heat of an oven. These conditions can cause…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: How to Prepare Jars for Canning

May 7, 2026
Preparing canning jars is an important step in the process. One of the very first steps in the canning process is preparing your equipment, including canning jars. Here’s how to go about prepping your jars for canning.Inspect.  Whether used or fresh out of a new box, inspect jars to make sure…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Is Reusing Commercial Product Jars Wise?

May 7, 2026
Commercial product jars are not designed to be repurposed for home canning. Is it possible to reuse mayonnaise and other similar commercial product jars for home canning? Some people have done so with some success. But even though it’s technically possible, it’s really not advisable. Here’s why…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: When and How to Sterilize Canning Jars

May 7, 2026
It's not always necessary to sterilize jars before canning.When canning, sterilizing jars is essential only when processing times are less than 10 minutes. For processing times of 10 minutes or more, pre-sterilization is not required – the jars become sterilized during processing. Can you pre-sterilize…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Jar Breakage is Shocking, but Avoidable

May 7, 2026
Canning Basics: Thermal shock and how to prevent it. There are many reasons that canning jars can break during the canning process.  One common cause for jar breakage is thermal shock, caused by a temperature differential between hot and cold. The break is characterized by a crack that runs around…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Cook Red Kidney Beans Safely to Destroy Toxicity

May 7, 2026
Cook them properly and not in a slow cooker! Red kidney beans are a healthy food – unless they’re not cooked properly. They contain a compound (“PHA”), found in many types of beans, and at especially high levels in red kidney beans. PHA can be toxic at high levels; in fact, consuming only 4 or 5 raw or…
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