Vitamin
D
Vitamin
D
is a fat-soluble vitamin that will be hard to come by after the bottled variety
runs out. It is found naturally in only a few foods, such as fish-liver oils,
fatty fishes like tuna and salmon, some mushrooms, beef liver, and egg yolks
(in small amounts). Vitamin D is also synthesized by the skin during exposure
to ultraviolet light. Research suggests it would take 15-30 minutes of sun
exposure, twice a week, to the arms and legs or back to synthesize sufficient
amounts of vitamin D. Also, people with darker skin pigments tend to synthesize
less vitamin D.
Vitamin
D is essential for good bone health, and it may help strengthen muscles and
protect against cancer and diabetes. Furthermore, calcium absorption in the gut
requires adequate vitamin D levels. In the 1930s, a milk fortification program
was initiated in the U.S. to help combat rickets, which was a major public
health problem at the time. Today, the program has helped ensure that rickets
is now quite uncommon in the U.S. and Canada. What happens when fortification
programs like these cease to exist in our diets?
Low
levels of vitamin D can also lead to osteomalacia (the weakening of bones) in
adults. Despite the success of milk fortification in children, many U.S. adults
are currently vitamin D deficient to some degree. The current recommendation is
that all individuals should receive 400IU of vitamin D per day.
So
what happens when TEOTWAWKI and the multivitamin bottles run out? Humans will
eventually readjust to getting our vitamin D from sunlight and unfortified
foods. Listed in the table below is the vitamin D content in some of the better
food sources of the vitamin. As food sources of vitamin D are scarce, access to
these dietary staples will be critical, particularly in a situation where
sunlight exposure must be limited.
Table
1. Vitamin D content in food: (400IU of Vitamin D is recommended for adults
daily)
Food
|
IUs per Serving
|
Cod liver oil, 1 tablespoon
|
1,360
|
Swordfish, cooked, 3 oz
|
566
|
Salmon, cooked 3 oz
|
447
|
Tuna, canned in water, drained, 3 oz
|
154
|
Sardines, canned in oil, drained, 2 sardines
|
46
|
Egg yolk
|
46
|
Beef liver, 3 oz
|
11
|
In
the SHTF scenario, breastfeeding will likely become a staple once again, once
infant formula runs out. Despite the plethora of benefits, human milk is
usually inadequate to supply the infant with adequate amounts of vitamin D.
Current recommendations include giving exclusively breastfed infants
supplements of vitamin D, although this liquid formulation may be difficult to
attain in a grid-down scenario. The degree of vitamin D in breast milk is
largely dependent upon the serum concentrations in the mother. Actively
supplementing the mother with the right foods and sunlight will certainly help
with this endeavor. Studies have shown that maternal intake of 400IU per day
was grossly inadequate to produce effective vitamin D in breast milk. However,
mothers who take high doses of vitamin D during breastfeeding (6000IU) were
successful in maintaining their own vitamin D stores and producing adequate
levels in breast milk. Campaigns to reduce skin cancer have lead to mothers
either avoiding sun exposure or using sunblock and clothing to greatly reduce
it. In a prolonged grid-down scenario, mothers will need to re-evaluate the
risks and benefits of short duration sun exposure (15-30 min per day, without
getting sunburn) when dietary sources of vitamin D are hard to attain.
Prepper
literature has often mentioned the risk of toxicity in some fat-soluble
vitamins. Vitamin D toxicity is highly unlikely from dietary consumption, even
with fortification programs. Sunlight will not lead to toxicity, as the body
naturally reduces synthesis as adequate levels are achieved. However, excessive
supplement usage certainly can lead to toxicity. Toxic levels are possible in
infants taking greater than 1000IU per day, kids taking greater than 2500IU per
day, and adults taking more than 4000IU daily on a chronic basis. In adults,
10,000 IU daily markedly increases toxicity risk.
Vitamin
C
Vitamin
C
is a water-soluble vitamin that is naturally present in some foods. Humans
cannot synthesize vitamin C, so it must be consumed. It is required for the
synthesis of collagen (making it critical for wound healing) and is an
essential component of connective tissue. Also, it is an important antioxidant,
as vitamin C plays an important role in immune function. Most adults and teens
should consume 50-90 mg per day, although women who are breastfeeding need
approximately 120 mg per day, since vitamin C is passed through to breast milk.
A
lack of vitamin C causes scurvy, which is historically associated with pirates.
This disease was problematic for centuries, particularly for campaigning
soldiers and for sailors who would go several months at sea, eating exclusively
salted meats and grains (sound familiar to some preppers out there?) as opposed
to foods containing vitamin C. In the 18th century, more British solders died
from scurvy than from enemy engagement.
Scurvy
usually begins within one month of vitamin C deficiency and progresses so
quickly that death can occur just a few months later. Scurvy symptoms begin
with extreme fatigue. Next, spots appear on the legs and the gums begin to
bleed. As the disease advances, open wounds develop, teeth fall out, extreme muscle
weakness occurs, and ultimately, it results in death.
Most
vitamin C is available in the American diet through fruits and vegetables,
especially citrus fruits, tomatoes, peppers, and potatoes (see table 2).
Breakfast cereals are sometimes fortified with vitamin C, although grains do
not naturally contain vitamin C. Prolonged storage and cooking reduces the
vitamin C content of food. Steaming may lessen cooking losses. Cow’s milk has
very small amounts of Vitamin C, and this amount becomes negligible during the
heating involved in pasteurization.
Table
2. Vitamin C Content in Foods: (most adults require 50-90 mg daily)
Food
|
Mg per serving
|
Sweet red pepper, ½ cup
|
95
|
Orange juice, ¾ cup
|
93
|
Orange, 1
|
70
|
Broccoli, cooked, 1 cup
|
51
|
Tomato juice, ¾ cup
|
34
|
Baked potato, 1 medium
|
17
|
Spinach, cooked, ½ cup
|
9
|
In a
TEOTWAWKI, canned fruits and vegetables, as well as supplements, can provide
necessary vitamin C for quite some time. However, as one transitions to a local
food commerce, regional variations will emerge. Oranges and orange juice will
become a rare commodity for northern inhabitants. Colder-climate winters
without canned fruits or vegetables will likely result in regional scurvy
symptoms. The prepared family would learn about the fruits and vegetables that
can be harvested in their local region and develop a way to harvest and store
these items over the winter season. When prepping for a prolonged grid-down
scenario, pantry items to consider stocking include both canned tomatoes and
potatoes. In warmer months, dandelions are also a great source of Vitamin C. Be
sure to remember that breastfeeding will provide infants with adequate vitamin
C (if the mother consumes enough herself); evaporated milk and cows milk,
however, lack vitamin C and would not serve as an effective substitute for
human breastmilk.
Vitamin
A
Are
carrots really good for eyesight? During WWII, British propaganda indicated
that fighter pilot John “Cats’ Eyes” Cunningham thanked a steady diet of
carrots for his nighttime flying prowess. (In reality, the propaganda was meant
to conceal the use of radar.) Carrots won’t help to make one’s vision better,
but the lack of vitamin A is certainly harmful for eye health. Vitamin A is a
fat-soluble vitamin that is important for maintaining normal vision, balancing
the immune system, reproducing, and preserving healthy organ function.
Vitamin
A
is found in meat, poultry, fish, dairy products, fruits, vegetables, and other
plant-based products. The most common type of vitamin A in foods and dietary
supplements is beta-carotene. The FDA has established a vitamin A Daily Value
(DV) of 5,000 IU from a varied diet of both plant and animal foods. Vitamin A
is added to some foods, such as milk and cereal. Common sources of vitamin A
include:
·
Beef
liver and other organ meats,
·
Some
types of fish, such as salmon,
·
Green
leafy vegetables and other green, orange, and yellow vegetables, such as
broccoli, carrots, and squash,
·
Tomato
products,
·
Fruits,
including cantaloupe, apricots, and mangos, and
·
Dairy
products (cow’s milk has some vitamin A, but it is also fortified).
Vitamin
A deficiency is currently rare in the U.S., although it is quite common in
third-world countries. The most common symptom of vitamin A deficiency is an
eye condition called xerophthalmia, which begins as night blindness and can
cause complete blindness if untreated. Moreover, a vitamin A deficiency is the
leading cause of blindness in kids.
What
happens in a prolonged TEOTWAWKI? In the absence of fortified foods (primarily
fortified milk and cereals), a vitamin A deficiency would be rare, if there is
still access to meat, diary, and vegetables. A deficiency is most likely to
occur in people who use grains as their diet’s staple. People at highest risk
for deficiency are infants, children, breastfeeding moms, and anyone with
chronic diarrhea. Therefore, preppers should ensure their preps contain more
than just grains.
As a
fat-soluble vitamin, vitamin A is harmful if taken in excess, although it is
dependent upon the quantity and rapidity of the intake. Overdose typically
occurs in the setting of excessive vitamin A supplements. It has also been
reported following sudden, yet excessive intakes of the natural vitamin, as
with Arctic explorers who ate polar bear liver. Chronic intakes of excess
vitamin A lead to increased intracranial pressure, liver damage, dizziness,
nausea, headaches, skin irritation, pain in joints and bones, coma, and even
death. Therefore, when you slay the neighborhood polar bear, leave the liver
for the birds.
Vitamin
E
Vitamin
E
is a fat-soluble vitamin that is an important antioxidant found in many types
of food. As such, deficiencies are very rare. Most deficiencies occur in people
with digestive tract diseases where they are unable to absorb fats. Many
advocate that vitamin E supplements are good for heart disease, immune system,
cancer prevention, and dementia. Research studies have largely debunked the
heart disease claim, and the other conditions have variable results with
inconclusive data.
Vegetable
oils, like wheat germ and sunflower oils, and nuts and seeds are among the best
sources of vitamin E. Corn and soybean oils also provide some vitamin E. Green
vegetables, such as spinach and broccoli, provide some vitamin E. Many of our
processed foods are fortified with vitamin E, but vitamin E deficiency is not
as likely in a SHTF scenario, when compared to other vitamin deficiencies.
In
Part 2 of this article, I’ll continue to go over the essential vitamins and
their sources and wrap it up with a summary that includes the “Top Ten Food for
Thought”.
From the Survival Blog
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