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Colief Vitamin D3 Drops - 20ml

Colief Vitamin D3 Drops - 20ml

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  • ✔️ Supports healthy bone and teeth development in babies from birth
  • ✔️ Provides NHS-recommended 400 IU vitamin D3 daily for infants
  • ✔️ Easy-to-use dropper for accurate dosing in newborns and toddlers
  • ✔️ Suitable for breastfed babies who need daily vitamin D supplementation
  • ✔️ Helps prevent rickets and vitamin D deficiency in young children

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What Are Vitamin D Drops for Babies?

 

Colief Vitamin D3 Drops 20ml is a liquid oral supplement designed to deliver cholecalciferol — the natural form of vitamin D — to babies, toddlers, and adults who may not be getting enough from sunlight or diet alone. In the UK, sunlight exposure is often insufficient to meet the body's vitamin D needs, particularly during autumn and winter months. That's why the NHS recommends all babies from birth to one year of age receive a daily vitamin D supplement, regardless of whether they are breastfed or formula-fed. You can browse our full range of vitamins and supplements if you're looking for additional nutritional support for your family.

At just £7.99 for a 20ml bottle, Colief Vitamin D3 Drops offer a straightforward, affordable way to meet daily requirements. The drop format makes dosing easy — no tablets to swallow, no fuss. Vitamin D drops for babies are particularly important for breastfed infants, as breast milk alone does not contain sufficient vitamin D to meet a baby's needs.

 

How Do Colief Vitamin D3 Drops Work?

 

Cholecalciferol (vitamin D3) is absorbed through the gut wall after oral administration. Once in the bloodstream, it travels to the liver where it is converted to calcidiol (25-hydroxyvitamin D). The kidneys then convert this into calcitriol — the biologically active form of vitamin D. Calcitriol acts on receptors throughout the body to regulate calcium and phosphate metabolism.

  • Promotes absorption of calcium and phosphate from the intestine
  • Supports mineralisation of bones and teeth
  • Contributes to normal immune system function
  • Helps maintain normal muscle function
  • Supports cell division processes

 

Who Should Use Colief Vitamin D3 Drops?

 

These drops are suitable for a wide range of people. The NHS specifically recommends vitamin D supplementation for babies and young children, but adults with limited sun exposure also benefit. If you're unsure whether your child needs supplementation, speak to your health visitor or pharmacist.

  • Babies from birth to 12 months (breastfed or formula-fed receiving less than 500ml formula daily)
  • Children aged 1 to 4 years
  • Pregnant and breastfeeding women
  • Adults with limited sun exposure or darker skin tones
  • Older adults who spend little time outdoors

You'll also find a range of products for little ones in our baby and toddler collection, including other essentials for infant health and wellbeing.

 

How Do Colief Vitamin D3 Drops Compare to Alternatives?

 

Feature Colief Vitamin D3 Drops 20ml Typical Vitamin D Tablet/Capsule
Suitable for babies Yes — from birth No — not suitable for infants
Form Oral liquid drops Tablet or capsule
Ease of dosing Dropper included — easy to measure Requires swallowing whole
Can be added to food/milk Yes Generally no

 

Is Colief Vitamin D3 Drops Suitable for All Babies?

 

Colief Vitamin D3 Drops are generally well tolerated and suitable for most babies and children when used as directed. However, if your baby has a known hypersensitivity to any of the ingredients, or a condition affecting calcium metabolism such as hypercalcaemia or hyperparathyroidism, you should not use this product without first consulting a doctor. Always check the full ingredient list if your child has known allergies.

Store the bottle below 25°C, away from direct sunlight, and do not refrigerate. Once opened, use within the period stated on the packaging. As with all vitamin D drops for babies, keep the bottle out of reach of children and do not exceed the stated daily dose.

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.

Colief Vitamin D3 Drops 20ml specifications
Treatment category Vitamin D supplementation
Mechanism of action Cholecalciferol is converted to active calcitriol, regulating calcium and phosphate absorption
Effective for Prevention and treatment of vitamin D deficiency in babies, children, and adults
Suitable for Babies from birth, toddlers, children, adults
Active ingredient Cholecalciferol (Vitamin D3)
Pack size 20ml
UK classification General Sale (GSL)
Drug class Fat-soluble vitamin supplement
Preparation Oral liquid drops
Route of administration Oral

Specifications of Colief Vitamin D3 Drops 20ml

 

What Is Colief Vitamin D3 Drops and What Is It Used For?

 

Colief Vitamin D3 Drops 20ml contains cholecalciferol, the naturally occurring form of vitamin D. It is used to supplement dietary intake of vitamin D in individuals who are at risk of deficiency — most commonly babies, young children, pregnant women, and adults with limited sun exposure. Vitamin D is essential for the absorption of calcium and phosphate, which are critical for building and maintaining strong bones and teeth. Without adequate vitamin D, children can develop rickets — a condition causing soft, weak bones — and adults may develop osteomalacia.

The NHS advises that babies from birth to one year should receive a daily supplement of 8.5 to 10 micrograms (340–400 IU) of vitamin D, and children aged 1 to 4 years should receive 10 micrograms (400 IU) daily. These drops provide a convenient way to meet those recommendations.

 

What Do You Need to Know Before Using Colief Vitamin D3 Drops?

 

Before giving these drops to your baby or taking them yourself, read the following carefully. Do not use this product if any of the contraindications below apply.

Do not use if:

  • The individual has hypercalcaemia (high blood calcium levels)
  • The individual has hypercalciuria (high calcium in the urine)
  • There is a known hypersensitivity to cholecalciferol or any other ingredient
  • The individual has nephrolithiasis (kidney stones containing calcium)
  • The individual has sarcoidosis or other granulomatous diseases (which can increase sensitivity to vitamin D)

Possible drug interactions — tell your doctor or pharmacist if taking:

  • Thiazide diuretics (e.g. bendroflumethiazide) — may increase risk of hypercalcaemia
  • Digoxin or other cardiac glycosides — hypercalcaemia can increase toxicity risk
  • Anticonvulsants (e.g. phenytoin, carbamazepine) — may reduce vitamin D effectiveness
  • Orlistat — may reduce absorption of fat-soluble vitamins including vitamin D
  • Cholestyramine — may reduce intestinal absorption of vitamin D

 

How Should You Use Colief Vitamin D3 Drops?

 

Always use Colief Vitamin D3 Drops exactly as directed on the label or as advised by your pharmacist or health visitor. The dropper makes it easy to measure an accurate dose each time.

  1. Shake the bottle gently before each use.
  2. Use the dropper to draw up the correct number of drops for the age group.
  3. Place the drops directly into your baby's mouth, or add to a small amount of milk, formula, or food.
  4. Do not mix into a full bottle of milk — the baby may not finish it all, resulting in an incomplete dose.
  5. Replace the cap securely after use and store below 25°C away from direct sunlight.
Age Group Recommended Daily Dose Frequency
Birth to 12 months 8.5–10 micrograms (340–400 IU) Once daily
1–4 years 10 micrograms (400 IU) Once daily
Adults (at risk of deficiency) 10 micrograms (400 IU) Once daily

 

What Are the Possible Side Effects of Colief Vitamin D3 Drops?

 

When used at the recommended dose, side effects are very uncommon. Most people — including babies — tolerate vitamin D3 drops well. Side effects are most likely to occur if the product is taken in excess of the recommended amount over a prolonged period.

Common side effects (with excessive dosing):

  • Nausea or vomiting
  • Loss of appetite
  • Constipation
  • Fatigue or weakness

Less common or serious side effects (signs of hypercalcaemia):

  • Increased thirst and frequent urination
  • Confusion or disorientation
  • Muscle weakness or pain
  • Irregular heartbeat
  • Kidney problems

If you notice any of these symptoms, stop using the product and seek medical advice promptly. You can also find further support through our baby and toddler health range for other infant wellness products.

 

How Should You Store Colief Vitamin D3 Drops?

 

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and heat sources
  • Do not refrigerate or freeze
  • Keep the bottle tightly closed when not in use
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the label
  • Once opened, use within the period stated on the packaging

If you are looking for other daily health essentials, our vitamins and supplements collection includes a wide range of products to support overall wellbeing for the whole family.

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Frequently Asked Questions

Where can I buy Colief Vitamin D3 Drops online in the UK?

You can buy Colief Vitamin D3 Drops 20ml directly from Cured Pharmacy online for £7.99 with fast UK delivery. It is available without a prescription as an over-the-counter supplement. No GP visit is needed — simply add it to your basket and check out.

How do vitamin D drops for babies work in the body?

Cholecalciferol (vitamin D3) is absorbed from the gut and converted in the liver to calcidiol, then further converted in the kidneys to calcitriol — the active form. Calcitriol regulates calcium and phosphate absorption, which is essential for healthy bone development in infants. Without enough vitamin D, babies are at risk of developing rickets.

How do I give Colief Vitamin D3 Drops to my baby step by step?

Shake the bottle gently, then use the dropper to draw up the correct dose for your baby's age. You can place the drops directly into your baby's mouth or add them to a small amount of milk or food — just avoid mixing into a full bottle in case it isn't finished. Always replace the cap tightly after use and store below 25°C.

What is the correct dose of Colief Vitamin D3 Drops for a newborn?

The NHS recommends babies from birth to one year receive 8.5 to 10 micrograms (340–400 IU) of vitamin D daily. Always check the specific dosing instructions on the Colief product label, as the number of drops per dose may vary. If you are unsure, ask your pharmacist or health visitor for guidance.

What is the best time of day to give vitamin D drops to a baby?

There is no strict requirement for a specific time of day, but giving the drops at the same time each day — such as during a morning feed — helps build a consistent routine. Vitamin D3 is fat-soluble, so giving it alongside a milk feed may support absorption. Consistency matters more than timing.

What are the side effects of Colief Vitamin D3 Drops?

At the recommended dose, side effects are very rare and most babies tolerate these drops without any issues. Taking too much vitamin D over time can lead to hypercalcaemia, with symptoms such as nausea, increased thirst, frequent urination, and fatigue. If you notice any of these signs, stop use and contact your GP or pharmacist promptly.

Who is eligible to use Colief Vitamin D3 Drops?

These drops are suitable for babies from birth, toddlers, children, and adults who need daily vitamin D supplementation. The NHS particularly recommends them for breastfed babies, children aged 1–4, pregnant women, and adults with limited sun exposure. They are not suitable for individuals with hypercalcaemia or known hypersensitivity to the ingredients.

What happens if I miss a dose of Colief Vitamin D3 Drops?

If you miss a dose, simply give it as soon as you remember on the same day. Do not give a double dose the following day to compensate — just continue with the normal daily routine. Missing an occasional dose is unlikely to cause any harm, but try to keep supplementation consistent for best results.

How long can you use Colief Vitamin D3 Drops for?

The NHS advises that babies and young children should take vitamin D supplements throughout the year, not just in winter. Long-term daily use at the recommended dose is considered safe for infants and children. For adults, year-round supplementation is recommended for those with limited sun exposure or darker skin tones.

Do breastfed babies need vitamin D drops?

Yes — breast milk does not contain enough vitamin D to meet a baby's daily requirements, regardless of the mother's own vitamin D levels. The NHS recommends all breastfed babies receive a daily vitamin D supplement from birth. Formula-fed babies who consume less than 500ml of formula per day should also be supplemented, as infant formula is already fortified with vitamin D.

Can I give Colief Vitamin D3 Drops to a formula-fed baby?

If your baby is drinking 500ml or more of infant formula per day, they are likely already getting enough vitamin D from the fortified formula and may not need additional drops. However, if they are taking less than 500ml daily, supplementation is recommended. Always check with your health visitor or pharmacist if you are unsure.

Are Colief Vitamin D3 Drops suitable during pregnancy?

The NHS recommends that pregnant and breastfeeding women take a daily supplement containing 10 micrograms (400 IU) of vitamin D. Colief Vitamin D3 Drops can be used by adults including pregnant women, but you should confirm the appropriate dose with your midwife or GP. Do not exceed the recommended daily amount during pregnancy.

What are the alternatives to Colief Vitamin D3 Drops?

Other vitamin D drop products for babies and children are available in the UK, including Abidec and Healthy Start vitamin drops. Some multivitamin drops also contain vitamin D alongside vitamins A and C. You can explore our full vitamins and supplements range to compare options suitable for your family.

Can adults take Colief Vitamin D3 Drops?

Yes, adults can use these drops as a vitamin D supplement, particularly those who spend little time outdoors, have darker skin, or are at increased risk of deficiency. The NHS recommends adults at risk take 10 micrograms (400 IU) daily, especially during autumn and winter. Check the product label for the adult dose in drops.

What are the latest recommendations on vitamin D for babies in the UK?

The NHS and Public Health England recommend that all babies from birth to one year receive a daily vitamin D supplement of 8.5–10 micrograms, and children aged 1–4 receive 10 micrograms daily. These recommendations apply year-round, not just in winter. You can find further infant health products in our baby and toddler collection.

How Should You Use Colief Vitamin D3 Drops?

Using Colief Vitamin D3 Drops correctly ensures your baby or child receives the full benefit of each dose. The liquid drop format is designed to be simple and mess-free, whether you give it directly or mix it into food or milk.

What Is the Correct Dose of Colief Vitamin D3 Drops?

The correct dose depends on the age of the person taking the supplement. Always follow the dosage instructions on the product label. The NHS recommends the following daily intakes as a guide, but the number of drops per dose will be specified on the Colief packaging.

When Is the Best Time to Use Colief Vitamin D3 Drops?

There is no clinically mandated time of day for giving vitamin D drops, but consistency is key. Many parents find it easiest to give the drops during the first feed of the morning, making it part of the daily routine so it is less likely to be forgotten. Since vitamin D3 is fat-soluble, giving it alongside a milk feed may help with absorption, though this has not been shown to make a significant clinical difference at standard supplementation doses.

How Long Can You Use Colief Vitamin D3 Drops For?

The NHS recommends that babies and young children take vitamin D supplements throughout the year — not just during winter months. This is because even in summer, many infants and young children do not get sufficient sun exposure to produce adequate vitamin D through the skin. For adults with ongoing risk factors such as limited sun exposure, darker skin, or older age, year-round supplementation is also advised. There is no set maximum duration for use at the recommended daily dose, but you should review supplementation needs periodically with your GP or health visitor.

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 Colief Vitamin D3 Drops?

When used at the recommended daily dose, Colief Vitamin D3 Drops are very well tolerated by most babies, children, and adults. Side effects at normal supplementation doses are rare. The most common issues arise only when the product is taken in amounts significantly above the recommended daily intake over a prolonged period.

  • Nausea or stomach discomfort
  • Loss of appetite
  • Constipation
  • Headache
  • Fatigue or general tiredness

What Are the Less Common Side Effects of Colief Vitamin D3 Drops?

Less common side effects are typically associated with vitamin D toxicity (hypervitaminosis D), which occurs when excessive amounts accumulate in the body over time. This is unlikely to happen with correct use but is important to be aware of.

  • Increased thirst and dry mouth
  • Frequent urination
  • Muscle weakness or aches
  • Confusion or difficulty concentrating
  • Metallic taste in the mouth
  • Weight loss in infants

What Are the Serious Side Effects of Colief Vitamin D3 Drops?

Serious side effects are associated with hypercalcaemia — abnormally high levels of calcium in the blood — which can result from prolonged excessive intake of vitamin D. Hypercalcaemia is a medical emergency if severe. Signs to watch for include irregular heartbeat, kidney problems (such as reduced urine output or flank pain), severe vomiting, and altered consciousness. If you suspect your baby or child has received too much vitamin D, seek urgent medical attention or contact NHS 111 immediately.

What Should You Do If You Experience Side Effects?

If you notice any unusual symptoms in your baby or yourself after starting Colief Vitamin D3 Drops, stop using the product and contact your GP or pharmacist. For mild symptoms such as constipation or reduced appetite, reducing the dose or temporarily stopping supplementation may be sufficient. For any signs of hypercalcaemia — particularly in infants — seek medical advice without delay. Do not restart supplementation until you have spoken to a healthcare professional.

Can Colief Vitamin D3 Drops Interact With Other Medicines?

Yes, vitamin D3 can interact with certain medicines. Thiazide diuretics (such as bendroflumethiazide) can increase the risk of hypercalcaemia when taken alongside vitamin D supplements. Digoxin and other cardiac glycosides may become more toxic if calcium levels rise. Anticonvulsants such as phenytoin and carbamazepine can reduce the effectiveness of vitamin D. Orlistat and cholestyramine may reduce the absorption of fat-soluble vitamins including vitamin D3. Always inform your GP or pharmacist of all medicines and supplements you or your child are taking before starting this product.

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

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Content last updated: 31 Mar 2025

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