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Aciferol D3 10000iu Tablets 30s

Aciferol D3 10000iu Tablets 30s

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  • ✔️ Corrects vitamin D deficiency with 10,000 IU cholecalciferol per tablet
  • ✔️ Supports bone mineralisation and reduces osteomalacia risk
  • ✔️ Aids calcium absorption for stronger bones and muscles
  • ✔️ Suitable for adults with limited sun exposure or darker skin
  • ✔️ 30-tablet pack provides a full high-dose loading course

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What Are Vitamin D3 10000 IU Tablets and How Can They Help You?

 

Vitamin D deficiency is surprisingly common in the UK. The NHS estimates that around one in five people in England have low vitamin D levels — a figure that rises sharply during autumn and winter when sunlight is scarce. Vitamin D3 10000 IU tablets, such as Aciferol D3 10000iu, offer a high-dose oral cholecalciferol option for adults who need to correct a significant deficiency quickly and effectively. Each tablet delivers 10,000 International Units of cholecalciferol, the same form of vitamin D your skin naturally produces when exposed to sunlight.

If you're looking to support your bone health, immune function, or muscle strength, you'll find Aciferol D3 10000iu alongside a wide range of other health products in our vitamins and supplements collection. At £19.99 for 30 tablets, it represents a straightforward, clinically relevant option for those with confirmed or suspected deficiency.

 

How Does Aciferol D3 10000iu Work in the Body?

 

Cholecalciferol — the active ingredient in Aciferol D3 — is a fat-soluble vitamin that undergoes a two-step conversion once ingested. Understanding this process helps explain why getting the dose right really does matter.

  • Cholecalciferol is absorbed in the small intestine and transported to the liver.
  • In the liver, it is converted to calcidiol (25-hydroxyvitamin D), the main circulating form measured in blood tests.
  • The kidneys then convert calcidiol into calcitriol (1,25-dihydroxyvitamin D), the biologically active form.
  • Calcitriol regulates calcium and phosphate absorption in the gut, supporting bone mineralisation, immune cell function, and muscle performance.

Because vitamin D is fat-soluble, it is best absorbed when taken with a meal containing some fat. This is a small but important practical point worth remembering.

 

Who Should Consider Using Aciferol D3 10000iu Tablets?

 

High-dose vitamin D3 supplementation is not for everyone, but there are specific groups for whom it is particularly relevant. The NHS recommends that certain people take vitamin D supplements throughout the year, and for those with confirmed deficiency, a higher loading dose is often clinically appropriate under professional guidance.

  • Adults with a confirmed vitamin D deficiency (serum 25-hydroxyvitamin D below 25 nmol/L).
  • People with limited sun exposure — including those who are housebound, work indoors, or cover most of their skin.
  • Individuals with darker skin tones, who require more sunlight to produce adequate vitamin D.
  • Those with conditions affecting fat absorption, such as Crohn's disease or coeliac disease, which can impair vitamin D uptake.
  • Older adults, in whom skin synthesis of vitamin D is less efficient.

Always speak to your GP or pharmacist before starting a 10,000 IU dose, particularly if you have not had your vitamin D levels tested recently.

 

How Does Aciferol D3 10000iu Compare to Lower-Dose Vitamin D Supplements?

 

Feature Aciferol D3 10000iu Standard 1000 IU Supplement
Dose per tablet 10,000 IU cholecalciferol 1,000 IU cholecalciferol
Primary use Correcting significant deficiency General maintenance / prevention
Suitable for Adults with confirmed deficiency General adult population
Medical supervision advised Yes — especially long-term use Not usually required

 

How Should Aciferol D3 10000iu Be Stored and Who Should Avoid It?

 

Store Aciferol D3 10000iu tablets below 25°C in a dry place, away from direct sunlight and out of reach of children. Do not use after the expiry date printed on the packaging. Because this is a high-dose vitamin D3 10000 IU tablets product, it is not appropriate for everyone. People with hypercalcaemia (raised blood calcium), hypervitaminosis D, sarcoidosis, or certain kidney conditions should not use this product without explicit medical advice.

Pregnant or breastfeeding women should consult their GP before use, as excessive vitamin D intake during pregnancy carries risks. If you are managing a long-term condition or taking regular medicines, it is always worth checking with your pharmacist first.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Aciferol D3 10000iu Tablets 30s specifications
Treatment category Vitamin D deficiency / bone health supplement
Mechanism of action Cholecalciferol converted to active calcitriol; regulates calcium and phosphate absorption
Effective for Vitamin D deficiency, bone health support, immune function
Suitable for Adults with confirmed or suspected vitamin D deficiency
Active ingredient Cholecalciferol (Vitamin D3) 10,000 IU per tablet
Pack size 30 tablets
Strength 10,000 IU (250 micrograms)
UK classification Food supplement / OTC
Drug class Fat-soluble vitamin / secosteroid
Preparation Tablet
Route of administration Oral

Specifications of Aciferol D3 10000iu Tablets 30s

 

What Is Aciferol D3 10000iu and What Is It Used For?

 

Aciferol D3 10000iu Tablets contain cholecalciferol — the natural form of vitamin D3 — at a dose of 10,000 International Units per tablet. This high-dose formulation is used primarily to treat or correct vitamin D deficiency in adults. Vitamin D plays a critical role in calcium absorption, bone mineralisation, immune regulation, and muscle function. Without adequate levels, you may be at increased risk of osteomalacia (softening of the bones), osteoporosis, and frequent infections. The NHS advises that everyone should consider a vitamin D supplement during autumn and winter, and those at higher risk of deficiency may need supplementation year-round.

 

What Do You Need to Know Before Using Aciferol D3 10000iu?

 

Before taking this supplement, it is important to be aware of the following contraindications and warnings:

  • Do not take if you have hypercalcaemia (high blood calcium levels) or hypervitaminosis D (vitamin D toxicity).
  • Not suitable for people with sarcoidosis, certain kidney disorders (such as nephrolithiasis), or pseudohypoparathyroidism without medical supervision.
  • Not recommended for children unless specifically directed by a healthcare professional.
  • Use with caution if you have a history of kidney stones.
  • Consult your GP if you are pregnant or breastfeeding before taking high-dose vitamin D.
  • Do not take alongside other high-dose vitamin D products to avoid accidental overdose.

The following medicines may interact with cholecalciferol:

  • Thiazide diuretics (e.g. bendroflumethiazide) — may increase the risk of hypercalcaemia when combined with high-dose vitamin D.
  • Digoxin — hypercalcaemia caused by excess vitamin D can increase the risk of digoxin toxicity.
  • Corticosteroids — may reduce the absorption and effectiveness of vitamin D.
  • Orlistat — reduces fat absorption and may impair vitamin D uptake.
  • Anticonvulsants (e.g. phenytoin, carbamazepine) — may accelerate the breakdown of vitamin D.

 

How Should You Use Aciferol D3 10000iu Tablets?

 

Always follow the advice of your healthcare professional or the directions on the product label. The following steps outline standard usage for adults:

  1. Take one tablet orally, swallowed whole with a glass of water.
  2. Take with or shortly after a meal containing some fat to maximise absorption.
  3. Do not crush or chew the tablet unless the packaging states it is suitable to do so.
  4. Take at the same time each day to help you remember.
  5. Do not take more than the recommended dose without medical advice.
Indication Age Group Dose Frequency
Vitamin D deficiency (loading) Adults 10,000 IU (1 tablet) Once daily (as directed by a healthcare professional)
Maintenance (post-correction) Adults Lower dose (e.g. 1,000–2,000 IU) Daily — switch to lower-dose product
Children Under 18 Not recommended at this dose Seek medical advice

 

What Are the Possible Side Effects of Aciferol D3 10000iu?

 

Side effects are uncommon when this supplement is taken at the recommended dose and for the appropriate duration. However, taking too much vitamin D over time can lead to a build-up in the body, causing hypercalcaemia. If you experience any of the symptoms listed below, stop taking the tablets and seek medical advice promptly. You may also find it helpful to browse our pain relief range if you experience headaches or muscle discomfort during supplementation.

Common side effects (may affect up to 1 in 10 people at high doses):

  • Nausea or stomach discomfort
  • Constipation
  • Headache
  • Fatigue

Less common side effects (associated with excessive intake / hypercalcaemia):

  • Excessive thirst and frequent urination
  • Confusion or difficulty concentrating
  • Muscle weakness or bone pain
  • Loss of appetite or weight loss
  • Irregular heartbeat (in severe cases)
  • Kidney stones

 

How Should You Store Aciferol D3 10000iu Tablets?

 

Correct storage helps maintain the quality and effectiveness of your tablets throughout the pack. If you are managing multiple supplements or medicines at home, it is worth keeping everything organised and clearly labelled. You can also explore our vitamins and supplements collection for complementary products to support your overall health routine.

  • Store below 25°C in a cool, dry place.
  • Keep away from direct sunlight and moisture.
  • Do not store in the bathroom or near a sink.
  • Keep out of the sight and reach of children.
  • Do not use after the expiry date printed on the packaging.
  • Do not transfer tablets to a different container unless advised to do so.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Aciferol D3 10000iu Tablets online in the UK?

You can order Aciferol D3 10000iu Tablets directly from Cured Pharmacy, a GPhC-registered online pharmacy. No prescription is required, and the product is available as an over-the-counter supplement. Simply add it to your basket and choose your preferred delivery option at checkout.

How does Aciferol D3 10000iu work in the body?

Each tablet contains cholecalciferol, which is absorbed in the gut and converted first in the liver to calcidiol, then in the kidneys to calcitriol — the active form of vitamin D. Calcitriol regulates calcium and phosphate absorption, which is essential for bone strength, muscle function, and immune health. This two-step conversion process is why adequate liver and kidney function matters when taking high-dose vitamin D.

Who is eligible to take Aciferol D3 10000iu Tablets?

This product is intended for adults with confirmed or suspected vitamin D deficiency, those with limited sun exposure, people with darker skin tones, and individuals with conditions that impair fat absorption. It is not suitable for children or for people with hypercalcaemia, sarcoidosis, or certain kidney conditions without medical supervision. Always consult your GP or pharmacist before starting a high-dose supplement.

What is the correct dose of Aciferol D3 10000iu for adults?

The standard adult dose is one tablet (10,000 IU) taken orally once daily, or as directed by a healthcare professional. High-dose supplementation is typically used for a defined loading period to correct deficiency, after which a lower maintenance dose is usually recommended. Never exceed the stated dose without medical advice.

What is the best time of day to take Aciferol D3 10000iu?

There is no single "best" time, but taking your tablet with your largest meal of the day — ideally one containing some dietary fat — helps maximise absorption, as vitamin D is fat-soluble. Taking it at the same time each day also makes it easier to remember. Morning or lunchtime are popular choices for most people.

What are the side effects of Aciferol D3 10000iu and how do I manage them?

At recommended doses, side effects are uncommon and may include mild nausea, constipation, or headache. Taking the tablet with food usually reduces stomach discomfort. If you experience symptoms of hypercalcaemia — such as excessive thirst, confusion, or muscle weakness — stop taking the supplement and contact your GP promptly.

What happens if I miss a dose of Aciferol D3 10000iu?

If you forget to take a tablet, take it as soon as you remember — unless it is nearly time for your next scheduled dose, in which case simply skip the missed one. Never take two tablets at once to compensate for a missed dose. Because vitamin D is fat-soluble and stored in the body, an occasional missed dose is unlikely to cause significant problems.

How long can you take Aciferol D3 10000iu for?

The duration of high-dose supplementation depends on your baseline vitamin D levels and the advice of your healthcare professional. A typical loading course may last several weeks, after which blood levels are retested and a lower maintenance dose is usually prescribed. Long-term use of 10,000 IU daily without monitoring is not recommended, as it carries a risk of vitamin D toxicity.

Can Aciferol D3 10000iu interact with other medicines?

Yes. Cholecalciferol can interact with thiazide diuretics (increasing the risk of hypercalcaemia), digoxin (where raised calcium levels can increase toxicity risk), corticosteroids, orlistat, and certain anticonvulsants. Always tell your doctor or pharmacist about all medicines, supplements, and herbal products you are taking before starting Aciferol D3 10000iu.

Is Aciferol D3 10000iu suitable during pregnancy or breastfeeding?

High-dose vitamin D supplementation during pregnancy or breastfeeding should only be taken under medical supervision. The NHS recommends that pregnant and breastfeeding women take 10 micrograms (400 IU) of vitamin D daily, which is considerably lower than the 10,000 IU in this product. Speak to your GP or midwife before use.

What are the alternatives to Aciferol D3 10000iu?

If 10,000 IU is more than you need, lower-dose cholecalciferol supplements — such as 400 IU, 1,000 IU, or 4,000 IU tablets — are widely available and suitable for general maintenance. You can browse a range of options in our vitamins and supplements collection. Your GP can advise on the most appropriate dose based on your blood test results.

How do I know if I am vitamin D deficient?

The only reliable way to confirm deficiency is a blood test measuring serum 25-hydroxyvitamin D levels. Your GP can arrange this, or private testing is available through some pharmacies and online services. Symptoms of deficiency can include fatigue, bone pain, muscle weakness, and low mood — though many people have no obvious symptoms at all.

Can I take Aciferol D3 10000iu alongside calcium supplements?

Taking vitamin D alongside calcium is common and often clinically appropriate, as vitamin D is needed for calcium absorption. However, combining high-dose vitamin D with calcium supplements increases the risk of hypercalcaemia, so this combination should be used under medical guidance. Check with your pharmacist before combining the two.

What are the latest research findings on high-dose vitamin D supplementation?

Research continues to explore the role of vitamin D in immune health, cardiovascular function, and mental wellbeing. Current NHS and NICE guidance supports supplementation for deficiency correction and prevention in at-risk groups, but does not recommend high-dose supplementation for the general population without confirmed deficiency. Speak to your GP for the most up-to-date personalised advice.

Is Aciferol D3 10000iu vegan-friendly?

Cholecalciferol (vitamin D3) is traditionally derived from lanolin (sheep's wool), which means standard D3 products are not suitable for vegans. If you follow a vegan diet, look for a product specifically labelled as vegan vitamin D3 (derived from lichen) or consider vitamin D2 (ergocalciferol). You can explore suitable options in our vegan collection. Check the product label or contact the manufacturer to confirm the source of cholecalciferol in Aciferol D3 10000iu.

How Should You Use Aciferol D3 10000iu Tablets?

Using Aciferol D3 10000iu correctly makes a real difference to how well your body absorbs and uses the cholecalciferol. Because vitamin D is fat-soluble, it is absorbed most efficiently when taken alongside food — particularly a meal that contains some dietary fat, such as olive oil, avocado, eggs, or dairy. Swallow the tablet whole with a full glass of water and avoid taking it on an empty stomach where possible.

What Is the Correct Dose of Aciferol D3 10000iu?

The appropriate dose depends on your individual vitamin D status, which should ideally be confirmed by a blood test before starting high-dose supplementation. The table below outlines general dosing guidance, but always follow the specific advice of your GP or pharmacist, as individual requirements vary considerably.

When Is the Best Time to Use Aciferol D3 10000iu?

There is no strict clinical requirement to take vitamin D at a specific time of day, but consistency matters. Most people find it easiest to take their tablet with breakfast or lunch — whichever meal tends to contain the most fat. Some individuals report that taking vitamin D late in the evening affects their sleep, though evidence for this is limited. Choosing a time that fits naturally into your daily routine is the most practical approach.

If you are taking other supplements or medicines at the same time, check with your pharmacist that there are no timing conflicts — for example, some medicines are best taken at least two hours apart from vitamin D supplements.

How Long Can You Use Aciferol D3 10000iu For?

High-dose vitamin D3 supplementation at 10,000 IU per day is generally intended as a short-term loading course to correct a confirmed deficiency, rather than an indefinite daily supplement. The typical loading period ranges from a few weeks to a few months, depending on the severity of deficiency and your response to treatment. After this period, your GP will usually recheck your serum 25-hydroxyvitamin D levels and advise whether to continue, reduce the dose, or switch to a standard maintenance supplement.

Long-term unsupervised use of 10,000 IU daily is not recommended, as excessive vitamin D accumulation can lead to hypercalcaemia and associated complications. Regular monitoring is the safest approach.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Aciferol D3 10000iu?

When taken at the recommended dose and for the appropriate duration, Aciferol D3 10000iu is generally well tolerated by most adults. Side effects at therapeutic doses are uncommon, but they can occur — particularly if the supplement is taken on an empty stomach or if your vitamin D levels are already within the normal range.

  • Nausea or mild stomach discomfort
  • Constipation
  • Headache
  • Fatigue or general tiredness

What Are the Less Common Side Effects of Aciferol D3 10000iu?

Less common side effects are more likely to occur if the supplement is taken at doses higher than recommended, or for longer than advised without monitoring. These effects are largely associated with hypercalcaemia — a build-up of calcium in the blood caused by excessive vitamin D intake.

  • Excessive thirst and increased urination
  • Loss of appetite or unexplained weight loss
  • Muscle weakness or cramps
  • Bone pain
  • Confusion or difficulty concentrating
  • Kidney stones

What Are the Serious Side Effects of Aciferol D3 10000iu?

Serious side effects are rare but can occur with prolonged excessive intake. Vitamin D toxicity (hypervitaminosis D) is the primary concern with high-dose supplementation. Symptoms of severe hypercalcaemia include irregular heartbeat (arrhythmia), severe confusion, vomiting, and in extreme cases, kidney damage. If you experience any of these symptoms, stop taking the supplement immediately and seek urgent medical attention. Do not attempt to self-manage serious symptoms.

What Should You Do If You Experience Side Effects of Aciferol D3 10000iu?

For mild side effects such as nausea or constipation, try taking the tablet with a larger meal and ensure you are drinking enough water throughout the day. If symptoms persist beyond a few days, speak to your pharmacist. For any symptoms that suggest hypercalcaemia — such as confusion, excessive thirst, or muscle weakness — stop taking the supplement and contact your GP without delay. You should also report any suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Aciferol D3 10000iu Interact With Other Medicines?

Yes — cholecalciferol has several clinically relevant interactions that are worth being aware of before you start. Thiazide diuretics (such as bendroflumethiazide) can increase the risk of hypercalcaemia when combined with high-dose vitamin D. Digoxin toxicity risk rises if blood calcium levels become elevated. Corticosteroids, orlistat, and certain anticonvulsants (including phenytoin and carbamazepine) can reduce the effectiveness of vitamin D supplementation by impairing absorption or accelerating its breakdown. Always inform your GP and pharmacist of everything you are taking — including over-the-counter products and herbal supplements — before starting Aciferol D3 10000iu.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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