What Is Caffeine and What Are Its Effects?
Caffeine is a natural stimulant found in coffee, tea, cola and energy drinks that makes us feel more alert. Here is how it works, what it…
Dr. Nadia Okoro
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Dr. Nadia Okoro
Science & Health Writer
Dr. Nadia Okoro holds a PhD in molecular biology and writes about medicine, public health and scientific research with an emphasis on evidence.
Credentials: PhD, Molecular Biology
What Is Iron Deficiency?
Iron deficiency is when your body lacks enough iron to make healthy red blood cells, and it is one of the most common nutritional…
Dr. Nadia Okoro
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What Is Vitamin B12?
Vitamin B12 is an essential nutrient your body needs for healthy blood, nerves and energy, found mainly in animal foods. Here is what it…
Dr. Nadia Okoro
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What Is Dehydration?
Dehydration is when your body loses more fluid than it takes in, leaving it short of the water it needs to work properly. Here are the…
Dr. Nadia Okoro
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What Is a Tension Headache?
A tension-type headache is the most common kind of headache, usually felt as a dull, tight band of pressure around the head. Here is what…
Dr. Nadia Okoro
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What Is Sleep Debt?
Sleep debt is the accumulated shortfall between the sleep you need and the sleep you actually get. Here is how it builds up, what it does…
Dr. Nadia Okoro
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What Is Inflammation?
Inflammation is the body's natural response to injury and infection, and a vital part of healing. Here is the difference between helpful…
Dr. Nadia Okoro
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What Are Micronutrients?
Micronutrients are the vitamins and minerals your body needs in small amounts to work properly. Here is what they do, which ones matter…
Dr. Nadia Okoro
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What Are Macronutrients?
Macronutrients are the three nutrients your body needs in large amounts for energy and function: carbohydrate, protein and fat. Here is…
Dr. Nadia Okoro
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