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In this first
recitation, we will

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try to understand various
nutritional facts about food,

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while getting more practice
using R. Good nutrition

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is an important part of
leading a healthy lifestyle.

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Malnutrition can
result in obesity,

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which has been rising
at an alarming rate.

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In the US for instance,
while all states in 1990

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had less than 14% obesity,
figures started increasing.

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And by 2000, half of the
country has more than 20%

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of its population obese.

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The trend continues.

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And in 2010, all states
have at least more than 20%

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of their population obese.

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Many states across the country
reached an alarming situation.

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More than 35% of American
adults are obese.

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The trends Worldwide
are no different.

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Obesity has nearly
doubled across the globe.

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Obesity is one of today's
blatantly visible public health

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problems, and
increases people's risk

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to heart disease,
stroke, and diabetes.

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In fact 65% of the
world's population

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lives in countries
where obesity kills

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more people than underweight.

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So good nutrition is essential
for an overall healthy

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lifestyle and promoting it now
is more important than ever.

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We have access to hundreds
of nutrition and weight loss

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applications, and around 15%
of adults with cell phones

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use health applications
on their devices.

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These apps are mostly powered
by the United States Department

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of Agricultural, or
USDA, food database.

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The United States
Department of Agricultural

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distributes
nutritional information

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of over 7,000 food
items including

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amount of calories,
carbs, protein, fat,

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and sodium, among
other nutrients.

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It is exactly this
data that we will

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be analyzing in this recitation.

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In the next video, we will
read in the USDA data set in R

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and get more familiar
with its content.