Abstract
Many people in Saudi Arabia rely on vitamin D tablets on a daily basis, yet their levels do not improve as expected; Why does this happen?
Some also search for the difference between Intramuscular Vitamin D Injections vs Vitamin D Tablets, wondering whether the issue lies in the dosage or in the body’s ability to absorb the vitamin effectively.
In reality, increasing vitamin D levels is not only about how much you take, but also about how well your body absorbs and utilises it something that varies from person to person and depends largely on the method of administration.
In this article, we will explore the different ways to obtain vitamin D, who may benefit most from each method, and the key factors that influence how effectively vitamin D levels can be increased in the body.
Introduction
What is Vitamin D and Why Does the Body Need It?
Vitamin D is one of the essential vitamins that the body can produce naturally when exposed to sunlight; it can also be obtained from external sources such as food, oral supplements, and intramuscular vitamin D injections.
This vitamin is commonly known as the “sunshine vitamin” due to the way the body synthesizes it.
It plays a key role in helping the body absorb calcium, supporting bone strength, promoting muscle health, and enhancing immune function; it also contributes to regulating various vital processes within the body.
Despite the body’s ability to produce vitamin D and obtain it from external sources, deficiency remains a common issue, particularly in Saudi Arabia, where high temperatures often limit direct exposure to sunlight during the day, leading many people to go out after sunset instead.
In addition, some individuals may not consume adequate amounts of vitamin D or may have factors that affect its absorption, which highlights the difference in outcomes between obtaining vitamin D through intramuscular injections and oral supplements.
Main Content
How Does the Body Absorb Vitamin D?
Vitamin D is a fat-soluble vitamin, and therefore its absorption within the body depends largely on the presence of dietary fats in the gastrointestinal tract.
It is absorbed in the small intestine with the aid of bile acids, after which it enters the bloodstream and is transported to the liver, where it is converted into its active form that the body can utilize effectively.
Once activated, vitamin D undergoes additional metabolic processes before reaching target tissues and performing its physiological functions. However, any impairment in absorption, reduced efficiency of the digestive system, or disruption in these processes may negatively affect the body’s ability to benefit from vitamin D.
For this reason, many clinicians recommend taking oral vitamin D supplements with meals containing sufficient fat to enhance absorption.
Nevertheless, conditions such as fat malabsorption or gastrointestinal disorders may still limit its bioavailability, potentially leading to persistently low vitamin D levels even when supplements are taken regularly.
How Does Vitamin D Absorption Differ by Method of Intake?
The method of obtaining vitamin D significantly affects how the body processes it, including its absorption and the speed at which it becomes available for use.
Some forms rely on the digestive system and pass through multiple stages of digestion, while others deliver the vitamin directly into the body, as seen with intravenous administration.
The most common forms of vitamin D, based on the method of intake and absorption efficiency, include the following:
Vitamin D Tablets
Vitamin D tablets are available in the market and are considered the most common oral supplement for this vitamin.
Their absorption mainly depends on the efficiency of the digestive system, which requires the presence of fats for the vitamin to be effectively absorbed in the intestines.
Among the factors that affect how well vitamin D tablets are absorbed are the type of food consumed, the dosage amount, the duration of consistent use, and the condition of the digestive system; this leads to differences in results from one person to another.
Due to these multiple stages, vitamin D tablets take longer for the body to absorb and to achieve the desired results in raising vitamin D levels, especially in cases of poor absorption.
Vitamin D drops for children
Vitamin D drops for children are also available; they come in the form of oral drops that are absorbed through the digestive system in the same way the body absorbs tablets in adults, relying on the presence of fats in the body to increase absorption efficiency.
There are also factors that affect this, such as whether the child receives vitamin D doses regularly and the child’s overall health, especially during the early stages of growth.
Vitamin D Injections
You can also receive a vitamin D intramuscular injection, which helps deliver it directly into the body by injecting it into the muscle.
The body then begins to absorb it gradually and transport it into the bloodstream without passing through the digestive system.
This method helps reduce the impact of absorption issues related to the stomach and provides greater efficiency in maintaining stable vitamin D levels in the body.
Why Do Vitamin D Levels Remain Low Despite Taking Tablets?
Choosing vitamin D tablets to raise its levels in the body is a preferred option for many people; despite taking their doses regularly on a daily basis, they find that these levels do not increase enough to meet their body’s needs, which leads them to ask: what’s the problem?
This can indeed be confusing, especially when the real issue and the factors affecting vitamin absorption in the body are not well understood.
There are several reasons that may reduce its efficiency, which can be summarized as follows:
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Poor absorption of fats by the digestive system.
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Digestive disorders that affect absorption efficiency.
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Not taking the supplement with a meal that contains fats.
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Irregular intake of doses or taking doses lower than what the body needs.
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Reduced efficiency of the body’s metabolic processes due to aging.
Which is Faster in Raising Vitamin D Levels?
The method used to obtain vitamin D certainly affects the ability to raise its levels in the body to the desired range, depending on how efficiently it is absorbed.
As explained, vitamin D tablets pass through several stages, starting with the digestive system and the small intestine, until reaching the final stage where vitamin levels increase.
This process may take a longer time for the desired results to appear, especially when there are factors that affect absorption efficiency.
In contrast, receiving a vitamin D intramuscular injection helps reduce these stages, as it reaches the body more quickly and therefore leads to a faster increase in vitamin levels in the blood.
Accordingly, the intramuscular injection method is considered the fastest way to raise vitamin D levels in the body; oral tablets can then be used when the goal is to maintain these levels, provided they are taken regularly.
Conclusion
Who Needs Intramuscular Vitamin D Injections Instead of Tablets?
Since vitamin D tablets may not provide the required speed in raising its levels in the body, obtaining it through intramuscular injection may be the most suitable option for many people, especially in the following cases:
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Severe vitamin D deficiency.
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People with poor absorption or digestive system problems.
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Older adults.
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Individuals with health conditions that prevent vitamin D levels from increasing despite regular use of oral supplements.
Sources
https://www.mayoclinic.org/drugs-supplements-vitamin-d/art-20363792
https://pmc.ncbi.nlm.nih.gov/articles/PMC5240054/
https://pubmed.ncbi.nlm.nih.gov/39174041/
https://www.sciencedirect.com/science/article/abs/pii/S1871402117300139
