14 Signs of Vitamin D Deficiency

Vitamin D is a fat-soluble vitamin. Getting enough vitamin D is necessary for your body to operate.

Your body naturally produces vitamin D from sun exposure and a few foods, but if you have a deficiency, vitamin D can be hard to generate naturally.

What is Vitamin D Deficiency?

Vitamin D is an essential nutrient that your body uses in every system. If you don’t get enough vitamin D, you will likely see at least one sign of vitamin D deficiency.

Unlike other vitamin deficienciesy, vitamin D deficiency may affect almost every area of your life, including mental health, bone health, and your immune system.

If you suspect you have insufficient vitamin D, talk to your healthcare provider. A blood test is enough for your healthcare provider to diagnose a vitamin D deficiency.to have a Vitamin D deficiency diagnosed by your healthcare provider.

What Are the Normal Vitamin D Levels?

Normal Vitamin D levels vary based on age. According to the National Institute of Health’s Office of Dietary Supplements (https://ods.od.nih.gov/factsheets/VitaminD-Consumer/), these are the minimum amounts of vitamin D by age:

  • 0-12 months: 10 micrograms (mcg)
  • 1-70 years: 15 mcg
  • 71+ years: 20 mcg

These adequate vitamin D amounts stay consistent if you are pregnant or breastfeeding.

What Are the Stages of Vitamin D Deficiency in Your Body?

There are three levels of vitamin D deficiency: mild, moderate, and severe. Through each level, the signs of vitamin D deficiency stay the same, but each level has increasingly severe symptoms.

Vitamin D levels are measured in ng (one billionth of a gram) per milliliter (mL) of blood, or ng/mL.

Recommended vitamin D levels are between 20-50 ng/mL. Anything less than 20 ng/mL is considered low vitamin D levels.

Mild Vitamin D Deficiency

10-20 ng/mL is considered a mild vitamin D deficiency.

Moderate Vitamin D Deficiency

5-10 ng/mL is considered a moderate vitamin D deficiency.

Severe Vitamin D Deficiency

Less than five ng/mL is a severe vitamin D deficiency.

What Are the 14 Signs of Vitamin D Deficiency?

There are 14 signs of vitamin D deficiency to look for. If you experience any of these 14 signs of vitamin D deficiency, speak with your doctor.

  1. Muscle Pain

Consistent muscle pain or muscle weakness is one of the earliest signs of vitamin D deficiency. Vitamin D contributes to keeping muscles healthy, so if you have a vitamin D insufficiency, you will have muscle weakness and even persistent muscle pain.

  1. Painful Bones

Vitamin D helps your bones absorb calcium, keeping your bones healthy. It’s important to maintain healthy levels of vitamin D for bone health.

If you feel bone pain on a daily basis, it is likely a sign of vitamin D deficiency, causing low blood calcium levels. Bone pain is one of the clearest signs of vitamin D deficiency.

  1. Fatigue

Low levels of vitamin D can lead to high levels of fatigue. Without enough vitamin D, your body has a difficult time maintaining energy.

This is why; if you tell your doctor you have extreme fatigue, they are likely to recommend a blood test and look for vitamin D deficiency.

  1. Reduced Endurance

Beyond general fatigue, Vitamin D helps you maintain energy for a longer period in states of either extremely high or extremely low physical activity.

A vitamin D deficiency will make it harder to keep up your energy when doing prolonged activities, whether that activity is sitting at your desk or running a marathon. Low endurance makes it even harder to keep your body healthy.

  1. Low Moods

Vitamin D assists mental health by helping to stabilize moods.

This is one reason why people suffer Seasonal Affective Disorder. Less sun exposure during the winter months puts people at higher risk of low levels of vitamin D, resulting in lower moods and greater mood swings.

  1. Trouble Sleeping

The direct symptoms of vitamin D deficiency may make it difficult to sleep well. Muscle and bone pain can make it challenging to sleep.

Additionally, your levels of vitamin D directly affect your energy. If you don’t have proper energy levels during the day, you’ll find it more difficult to sleep well at night.

  1. Sweaty Head

One of the clearest signs of vitamin D deficiency is an unusually sweaty head. This is because vitamin D helps to regulate your body temperature and keep you cool.

Vitamin D deficiency may lead to increased internal body temperature, which leads to additional sweat.

  1. Losing Hair

Vitamin D is one of the vital nutrients keeping your hair and nails healthy. A vitamin D deficiency may lead to hair weakening. It will become more thin and brittle, often leading to hair loss.

Hair loss can negatively affect your self-image, possibly additionally impacting moods.

  1. Wounds Heal Slowly

Vitamin D helps keep bones, muscles, and even skin healthy. It does this by keeping your immune system healthy.

Low vitamin D levels will affect your immune health, making it harder for your body to repair itself or fight off illnesses. A vitamin D deficiency will lead to slow wound healing. This will also increase recovery time from things like weight loss surgeries or other operations.

  1. Dizziness

Vitamin D plays a neurological task as well. Vitamin D helps to control your balance.

A vitamin D deficiency will make balancing more difficult, making nearly all tasks harder, whether sitting or walking.

  1. Heart Problems

Vitamin D helps keep blood vessels healthy and helps maintain healthy blood pressure. A vitamin D deficiency can lead to an increase in blood pressure.

Vitamin D is also an essential nutrient for the heart itself. Vitamin D deficiency puts you at greater risk of developing heart disease.

  1. Weight Gain

Vitamin D helps keep your metabolism stable. Vitamin D deficiency can lead to weight gain due to a destabilization of your metabolism.

If you are trying to lose weight, talk to your healthcare provider. They may recommend vitamin D supplements as well as fortified foods to help.

  1. Recurring Infections

Vitamin D helps keep your immune system running properly. Without it, your body has more difficulty fighting infection.

Vitamin D deficiency puts you at increased risk of infection, and it will make recovering from an infection more difficult and lengthy.

  1. Reduced Cognitive Function

Vitamin D is important for keeping your brain healthy. It helps regulate mood and generate healthy brain tissue.

Vitamin D deficiency will make it harder to perform important brain functions, like memory and decision-making.

What Happens When Vitamin D is Extremely Low?

We’ve seen what happens if you don’t get enough vitamin D, but what if your low vitamin D levels are severe? Can vitamin D deficiency be fatal?

It is unlikely that you will die as a direct result of vitamin D deficiency. However, the side effects of vitamin D deficiency can be extremely dangerous.

Severe symptoms include bone pain, muscle fatigue, and even depression. Vitamin D deficiency also puts you at increased risk of dangerous conditions like osteoporosis and heart disease.

What Are the Treatment Options for Vitamin D Deficiency?

There are two primary options for treating vitamin D deficiency if your body does not produce vitamin D in high enough amounts naturally: vitamin D supplement or foods with high vitamin D levels.

Your body creates vitamin D when exposed to sunlight, but increasing sun exposure is not recommended if you are looking for more vitamin D. The absorption level is not predictable, and increased sun leads to a higher risk of skin cancer.

Vitamin D Supplements

Vitamin D supplements are taken orally. A vitamin D supplement contains much more vitamin D than your body would produce naturally.

You can take magnesium supplements, which helps activate vitamin D, or you can take a vitamin D3 supplement directly. You can also take natural supplements, like cod liver oil.

In extreme cases, a doctor will advise vitamin D injections, but usually, a vitamin D supplement will be enough.

Dietary Changes

You can eat foods rich in vitamin D3 to help with a vitamin D deficiency, such as:

  • Fatty fish
  • Egg yolk
  • Fortified foods (cereals and milks)
  • Orange juice
  • Yogurt
  • Beef liver
  • Other dairy products
  • Soy drinks

Any of these foods will help with low vitamin D levels.

How Can Zero in From the Root Brands Help Me?

Zero In will give you all the benefits of a vitamin D supplement, while the all-natural ingredients provide even more value.

Zero-in will help get you away from brain fog and into laser-sharp mental focus.

What Are the Benefits of Using Zero in for Vitamin D Deficiency?

It’s a natural alternative to synthetic stimulants. Get all of your cylinders firing at full force. It is made with turmeric, pine bark, velvet bean seed, and vitamin D. 

Additionally, there is no risk of taking too much vitamin D with Zero In, which can cause its own negative symptoms. Zero In contains 125% of your daily value of Vitamin D, a safe and healthy amount.

Cognitive Function

Zero In helps support increased attention span and concentration levels through a natural, proprietary brain formula.

Mental Acuity

Zero In aids healthy brain function and focus while improving the delivery of oxygen to cells and increasing dopamine levels for up to 14 hours.


If you are noticing any sign of vitamin D deficiency, there are supplements and certain medications that can help you.

Zero In from The Root Brands can help if you are vitamin D deficient your vitamin D deficiency while providing other potential benefits, such as increased cognitive function and mental acuity.

Get Zero In for optimized brain function, sleep rhythms, and the benefits of vitamin D.