VITAMIN LOSS ASSOCIATED WITH PRE-MADE VEGETABLE JUICE
Can you and I agree before you read my blogpost that we're probably going to eat breakfast, lunch, dinner, and perhaps one or two snacks on most days? This is not a fast day. We're going to consume calories for energy and normal cellular replacement, repair, and growth from some kind of food source, be that solid or liquid.
Now that we've agreed to this, let me ask you, "In what nutritional state is the food that you're planning on consuming in?" Specifically, are you having grilled chicken that was killed several days ago or killed a couple of weeks ago and was frozen until it was purchased by your local grocer served on top of a head of lettuce that was picked over a week ago and then transported over several days via truck or barge 1,200 - 3,600 miles along with a few slices of cucumber and tomato that were taken from their vines two weeks ago?
I'm asking these tough questions in order to get you to think and understand that the food that you are going to eat really is NOT fresh at all, therefore, why are you overly concerning yourself with the nutrient integrity of your pre-made, stored vegetable juice to the point where you are thinking that it just isn't worth juicing vegetables and fruit you bought from your local fresh market or green grocer if you're not going to juice it and drink it immediately when the alternative meal that you would eat in place of the juice is FAR FROM fresh or nutrient packed?
Life is sometimes a long way off from perfect. Sometimes we have to hope for the best and accept the best-case scenario alternative. Many times, however, we're not going to get anything close to the ultimate result we were looking for so you and I are going to have to accept the best of whatever we can get at a particular moment.
Juicing can be just like life. Real-time juicing followed by immediate consumption is of course the ultimate way to get the most nutrition out of your at-home juicing or made-to-order guzzled-down-on the-spot juice from your local juice bar. Many times, however, we just don't get that option so we have to SETTLE for the best we can get which isn't the best case scenario but it is far better than nothing.
Making a large amount of juice ahead of time and storing it in the refrigerator in order get your daily allowance of vitamin-packed vegetables and fruits if you work an 8-12 hour-a-day job, are a full-time mother of 1-4 little kids, are taking 12-15 credits at school, are a busy social butterfly with lots of stuff to do throughout the day, or maybe just lazy person who doesn't want to make juice and then clean up a juicer 3-4 times a day is a great idea. Some nutrients, however, naturally breakdown or decay over time due to lipid oxidation, lipid rancidity, light, heat, and from a variety of complex reactions that involve degradation, volatilization, and recombination of sugars, amino acids, aldehydes, ketones, hydroperoxides, organic acids, and then there's phytochemical breakdown of flavonols, flavonoids, and color pigment that occur in vegetable, herb, and fruit juice.
Some of the huge words I just used above may have scared you into thinking pre-made juice is worthless but it isn't. The lifespan of most of the vitamins you are hoping to get from juicing are several days or longer so you're not going to lose much nutritional value in making and storing your vegetable juice ~12, 18, or 24 hours ahead of time. Drinking pre-made, stored vegetable juice is better than not drinking vegetable juice at all.
Vitamins A, K, C, and E last a long time before decaying. Most of your B vitamins, like B6 for example, stay in the juice for the most part during 24-hour cold refrigeration. B3, however, is one of the shorter-lived B vitamins which has a short half-life of ~20-45 minutes but your body makes B3 so you really shouldn't worry about your juice's B3 degradation.
In conclusion, the freshest juice is best BUT we don't live in a perfect world. We live in a 20-minute behind schedule, oh my gosh I lost my keys, I'm never going to make it on time, "Did I remember to brush my teeth" kind of a world so stop sweating the small stuff.
Drink the freshest juice you can. Remember that some juice is BETTER THAN no juice at all. A good rule of thumb if you have to pre-make your vegetable juice and store it in the refrigerator for later consumption is to minimize the juice's exposure to light and heat while slowing down cellular oxidation by using a resealable glass jar or jug that is filled as high to the top of the lid as possible to reduce the amount of oxygen in the container that can cause oxidation and refrigerate the vegetable/fruit juice in a really cold fridge but don't freeze it (no ice particles).
Here's to your health,
-Bell Gia
Nutrition and Fitness Expert
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