Is it hot to drink vitamin c? Instructions for taking vitamin C properly

28.07.23 204

Vitamin C is a very popular vitamin that has many health benefits. However, is taking vitamin c hot is one of the questions that many people are interested in. Besides, not everyone knows how to take vitamin C properly. So, let’s find the answer with Solife in this article!

1. What is the effect of vitamin C?

Vitamin C is a micronutrient that is very necessary for the continuous metabolism of the body to take place smoothly and smoothly. Many people often recommend that we take a lot of vitamin C supplements in order to receive great effects for the body such as:

  • Enhances iron absorption: Vitamin C helps to better metabolize poorly absorbed iron. Taking vitamin C will improve the absorption of iron in your daily meals.

  • Helps stabilize heart rhythm: Taking vitamin C before, during, and for a few days after heart surgery will help prevent arrhythmias.

  • Enhance resistance: Vitamin C supports the body’s immune system to help strengthen the body. Helps older adults increase athletic performance and muscle strength. At the same time, adolescents after supplementing with vitamin C will also improve oxygen levels during exercise.

  • Help detoxify the body: participate in the excretion of some toxins, metabolize cholesterol and prevent some types of cancer.

  • Helps to beautify skin: Vitamin C is also a type of antioxidant for the skin, capable of synthesizing collagen, protecting the skin from harmful rays from light, helping skin wounds to heal quickly. When we use enough vitamin C, we will have less wrinkles and smooth skin.

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Besides, Vitamin C is not only important for adults but also essential for children. Because when vitamin C is deficient, the body may experience some pretty serious problems such as nosebleeds, slow-healing wounds, bleeding gums, colds easily, etc.

The effect of vitamin C gives human health a lot and is good. But our body cannot produce this vitamin on its own. Therefore, it is very important to supplement and ensure a sufficient dose of vitamin C for the body every day, to help strengthen the immune system and avoid certain diseases.

2. Is taking vitamin C “hot”?

Many people wonder if taking vitamin c is hot, the answer is yes, if you take vitamin c the wrong way and too much for a long time. Signs of being “hot” are that your body often has pimples, rashes, and redness. Some reasons in the process of taking vitamin C can include:

  • Incorrect dosage: for any nutrient, not just vitamin C, if we use it in a bluff and unscientific way for a long time, it will lead to side effects. As a result, the body does not have time to adapt to that, causing pimples, rashes,….

  • Not drinking enough water: When taking vitamin c, if you don’t drink enough water every day, vitamin c will often cause the body to become hot and constipated. Therefore, you should always replenish your body with enough water to increase the absorption and absorption of vitamins.

  • Allergy to drug ingredients: In some cases, you take vitamin C at the right dose and drink enough water every day, but still have signs of “hot”. Then there is a high chance that you are allergic to the ingredients of the drug, this case is rare, so before using it, you should carefully check the ingredients and consult a doctor.

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To avoid “getting hot” when taking vitamin C, you should follow the rules and instructions of your doctor, absolutely do not make mistakes when taking it such as: taking the wrong dose, drinking less water, … If you are allergic to a drug ingredient, you must immediately go to the nearest hospital for advice and treatment.

3. Side effects of vitamin C in overdose

If vitamin C is overdosed for a long time, it will lead to an excess of vitamin C. From there, it will produce many side effects that have a very high risk of harm to health: such as digestive disorders, stomach ulcers, duodenal ulcers. colon, headache, insomnia, cystitis, diarrhea, increased formation of kidney stones, gout, decreased erythrocyte stability,… In addition, pregnant women pay special attention when taking vitamin C at high doses. High levels for a long time will have a great effect on the fetus, possibly causing scurvy in children.

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Common and serious side effects of vitamin C in overdose are mentioned below by Solife:

3.1. Effects on the digestive system

When using an overdose of vitamin C, especially a high dose of over 2000mg, it will make the body absorb the vitamin improperly, the most obvious side effect is digestive problems such as nausea, diarrhea, cramps. stomach. The countermeasures are to reduce the dose or temporarily stop taking it. If the condition worsens, immediately go to the nearest hospital for examination and treatment.

Besides, there are some other common side effects when taking too much vitamin C with signs of dizziness, back pain, headache, fatigue, toothache, rash, pain in the urinary tract, and heartburn.

3.2. Can cause kidney stones

Excess vitamin C when excreted from the body it is available in the form of oxalate. In some cases, during excretion, oxalate can potentially bind with minerals and form crystals that form kidney stones.

Taking too much vitamin C in the wrong dosage will increase the amount of oxalate in the urine, leading to a high risk of developing kidney stones. Especially when taking doses greater than 2000 mg/day.

Consuming too much vitamin C is likely to increase the amount of oxalate in your urine, thereby increasing your risk of developing kidney stones.

3.3. Risk of iron overload

Enhancing iron absorption is one of the effects of vitamin C, but taking too much can lead to iron overload. In cases of iron overload, it has the potential to cause serious damage to the heart, liver, pancreas, thyroid, and central nervous system.

However, people with hemoglobinopathy who already have high iron levels from taking an overdose of vitamin C can develop iron poisoning. In addition, people with hereditary iron overload may experience tissue damage.

It is very unlikely that an iron overload will occur if you take the right dose of vitamin C and according to your condition. Iron overload is more likely to occur when the excess iron is absorbed by you in supplement form.

4. Instructions for taking vitamin C properly

Not everyone knows how to use vitamin C properly to avoid harm to the body. Usually, you can supplement vitamin C with daily meals containing vitamin-rich vegetables. However, if you want to be faster and more convenient, you can use functional foods containing vitamin C. To guide you to drink properly, Solife has listed the following ideas:


Depending on age, gender and health status each person will have different vitamin C needs. Therefore, you need to carefully read the instructions for use and listen to your doctor’s advice to choose the right dosage level for your body condition.

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According to the recommendations of the Institute of Medicine of the National Academies of America, an adult needs 75-90 mg of vitamin C per day and the maximum safe dose is 2000mg. The same applies to pregnant and lactating women. Meanwhile, children 1-3 years old need 400mg, 4-8 years old need 650mg, 9-13 years old need 1200mg and children 14-18 years old need 1800mg.

There are also limited doses of vitamin C for specific exceptions. However, the exception limit dose is usually applied only with the consent of medical professionals.


Choosing the right time to drink will help limit the side effects related to the digestive system. It should be 30 minutes before a meal or two hours after a meal, and the dose should be divided into meals throughout the day.

However, for people with stomach pain, vitamin C should be taken after meals. Note, should not take vitamin C too late in the evening, because vitamin C is highly stimulant, making it difficult to sleep.


Vitamin C supplements should be stored in a dry place, away from direct light. The reason is that vitamin C is easily oxidized and degraded by light, air, and moisture.

If the bag is in use, it should be covered to prevent air from entering and affecting the quality of the product. In case vitamin C has expired or shows signs of damage, absolutely do not use it to avoid poisoning.

Some notes when taking vitamin C are as follows:

  • People with kidney stones should consult their doctor before taking vitamin C.

  • People with high blood pressure should not take vitamin c effervescent form because blood pressure may spike after taking it due to the chloride content in effervescent tablets.

  • Supplementing with vitamin C in the form of sodium ascorbate salt can cause excess sodium and is not good for people with blood pressure, edema and heart disease.

  • You should follow your doctor’s instructions on the type of vitamin C and the dosage of the supplement, and never increase the dose on your own.

  • Limit the use of injectable vitamin C as much as possible because of possible allergies.

  • Ensure daily nutrition, instead of relying solely on vitamin C pills.

See also: Should you take zinc and vitamin c at the same time?

In summary, vitamin C is a relatively safe substance with few side effects, but it should not be overused. As for the question of whether taking vitamin C is hot, the answer is yes if you take too much or take it improperly for a long time. If you use the right dosage and add enough water, you can rest assured that you will not be “hot”, not have acne, rash. Above is the useful information that Solife brings to you, hopefully you can receive and use it well for the process of using vitamin C.

Reference source:

Trần Hoàng Uyên (Senior Manager Pharmaceutical company) là chuyên gia cấp cao với nhiều năm kinh nghiệm trong lĩnh vực dược phẩm. Tốt nghiệp cử nhân chuyên ngành Quản lý dược I tại Trường Đại học Y dược TP. Hồ Chí Minh và hiện đang công tác tại công ty dược phẩm. Với hơn 10 năm kinh nghiệm làm việc trong ngành dược, chị Hoàng Uyên là chuyên gia cộng tác tham vấn y khoa cho danh mục blog cũng như các nội dung liên quan trên Solife. (Tran Hoang Uyen (Senior Manager Pharmaceutical company) is a senior specialist with many years of experience in the Pharmaceutical field. She graduated Bachelor of Pharmacy Management I at the University of Medicine and Pharmacy at Ho Chi Minh City and is currently working for a pharmaceutical company. With more than 10 years of experience working in the pharmaceutical industry, Ms. Hoang Uyen is a medical consultant collaborator for content on Solife's website.)