Pro-D3 Vitamin D (P)
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Pro-D3 is a range of high-quality Vitamin D3 (colecalciferol) food supplements available in a wide selection of strengths and dosage forms, including capsules, tablets, liquid drops, oral liquids, gummies and vegan formulations.
Vitamin D contributes to the maintenance of normal bones and teeth, normal muscle function and normal immune-system function, and supports the normal absorption and utilisation of calcium and phosphorus.
The range includes lower-strength daily supplements as well as higher-strength daily and weekly formulations, allowing the dose and format to be selected according to individual requirements and healthcare-professional advice.
Key features:
- Contains Vitamin D3 (colecalciferol)
- Wide range of strengths
- Daily and weekly formulations available
- Capsules, tablets, liquids, drops and gummies
- Separate vegan Vitamin D3 formulations available
- Standard Pro-D3 products are suitable for vegetarians
- Vegan products are suitable for vegans and vegetarians
- Halal suitable
- Kosher suitable
- Gluten free
- Gelatine free
- Lactose free
- Dairy free
- Soya free
- Nut and peanut free
- Manufactured in the UK
- Batch tested for quality
- Food supplement
Why Vitamin D is important:
Vitamin D contributes to:
- Maintenance of normal bones
- Maintenance of normal teeth
- Normal muscle function
- Normal function of the immune system
- Normal absorption and utilisation of calcium and phosphorus
- Maintenance of normal blood calcium levels
- The process of cell division
Vitamin D is produced naturally in the skin following exposure to sunlight, but sunlight in the UK may not provide sufficient Vitamin D throughout the year.
The NHS recommends that adults and children over 4 years should consider taking 10 micrograms (400 IU) of Vitamin D daily during autumn and winter.
People at increased risk of Vitamin D deficiency may be advised to take 10 micrograms (400 IU) throughout the year.
Higher strengths may be appropriate in some circumstances but should be selected according to individual requirements and, particularly at higher doses, healthcare-professional advice.
Pro-D3 Capsules
Pro-D3 capsules are easy-to-swallow, gelatine-free capsules containing Vitamin D3.
Daily capsules:
-
400 IU / 10 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
-
800 IU / 20 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
-
1000 IU / 25 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
-
2500 IU / 62.5 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
Vegan daily capsules:
-
Vegan 800 IU / 20 micrograms
- 30 capsules
- Plant-based Vitamin D3
- 1 capsule daily
-
Vegan 3200 IU / 80 micrograms
- 30 capsules
- Plant-based Vitamin D3
- 1 capsule daily
High-strength weekly capsules:
-
10,000 IU / 250 micrograms
- Available in packs of 10 or 30 capsules
- Manufacturer direction: 1 capsule weekly
-
20,000 IU / 500 micrograms
- Available in packs of 10 or 30 capsules
- Manufacturer direction: 1 capsule weekly
-
Vegan 20,000 IU / 500 micrograms
- 30 capsules
- Plant-based Vitamin D3
- Manufacturer direction: 1 capsule weekly
-
Pro-D3 Sport 20,000 IU
- 30 weekly capsules
- Designed for athletes
- Sport/batch-tested formulation
- Manufacturer direction: 1 capsule weekly
Take capsules with water, preferably after food.
Swallow whole.
Do not chew, open or exceed the recommended intake.
Pro-D3 Tablets
Pro-D3 tablets provide an alternative for people who prefer tablets rather than capsules.
Current strengths include:
- 400 IU / 10 micrograms – 30 daily tablets
- 800 IU / 20 micrograms – 30 daily tablets
- 1000 IU / 25 micrograms – 30 daily tablets
- 4000 IU / 100 micrograms – 30 daily tablets
- 25,000 IU / 625 micrograms – 15 weekly tablets
Daily-strength tablets are generally taken once daily according to the individual pack directions.
The 25,000 IU tablet is taken once weekly, or as advised by a healthcare professional.
Take with water, preferably after food.
Pro-D3 Liquid Drops – 100 IU per drop
Pro-D3 Liquid Drops provide a flexible way to adjust Vitamin D intake and may be particularly useful for children or people who have difficulty swallowing tablets or capsules.
Strength:
- 100 IU / 2.5 micrograms Vitamin D3 per drop
Pack size:
- 20ml
Manufacturer directions:
Adults:
- 4–10 drops daily
- Provides 400–1000 IU / 10–25 micrograms Vitamin D3
Children aged 6 months–12 years:
- 2–8 drops daily
- Provides 200–800 IU / 5–20 micrograms Vitamin D3
- Or as advised by a healthcare professional
The drops can be:
- Taken directly
- Mixed with food
- Mixed with water or another suitable drink
Shake well before use.
Once opened, use within 3 months.
A separate Vegan Pro-D3 100 IU/drop 20ml formulation is also available.
Pro-D3 Liquid – 2000 IU/ml
A higher-strength liquid Vitamin D3 formulation supplied with a dosing syringe.
Strength:
- 2000 IU / 50 micrograms per 1ml
Available pack sizes:
- 50ml
- 100ml
Manufacturer directions:
Adults:
- 0.5–1ml daily
- Provides 1000–2000 IU / 25–50 micrograms Vitamin D3
Children aged 6 months–12 years:
- 0.2–0.4ml daily
- Provides 400–800 IU / 10–20 micrograms Vitamin D3
- Or as advised by a healthcare professional
Shake well before use and measure using the syringe provided.
Can be taken directly or mixed into food or drink.
Once opened, use within 3 months.
A Vegan Pro-D3 Liquid 2000 IU/ml 50ml formulation is also available.
Pro-D3 Forte Liquid – 3000 IU/ml
A concentrated liquid Vitamin D3 supplement for adults who require a higher-strength liquid formulation.
Strength:
- 3000 IU / 75 micrograms per 1ml
Pack size:
- 50ml
Manufacturer directions for adults:
- 0.5–1ml daily
- Provides 1500–3000 IU / 37.5–75 micrograms Vitamin D3
Shake well before use and measure with the syringe provided.
Can be consumed directly or mixed with food or drink.
Once opened, use within 3 months.
Pro-D3 Vitamin D3 Gummies
Pro-D3 Gummies provide Vitamin D3 in a chewable, orange-flavoured format.
Strength:
- 1000 IU / 25 micrograms Vitamin D3 per gummy
Pack size:
- 60 gummies
Adults:
- Chew 1–3 gummies daily
- Provides 1000–3000 IU / 25–75 micrograms Vitamin D3
Children aged 3–12 years:
- Chew 1 gummy daily
- Or as advised by a healthcare professional
The gummies are:
- Gelatine free
- Pectin based
- Suitable for vegetarians
- Halal suitable
- Kosher suitable
They contain glucose syrup and sugar, so are not sugar free.
Once opened, use within 3 months.
Vegan Pro-D3 Range
The Pro-D3 Vegan range uses plant-based Vitamin D3 and is suitable for vegan diets.
Current vegan products include:
- Vegan 800 IU Capsules – 30
- Vegan 3200 IU Capsules – 30
- Vegan 20,000 IU Weekly Capsules – 30
- Vegan Liquid Drops 100 IU/drop – 20ml
- Vegan Liquid 2000 IU/ml – 50ml
These products are suitable for:
- Vegans
- Vegetarians
- Halal diets
- Kosher diets
- Gluten-free diets
Ingredients:
Ingredients vary according to the individual formulation.
Typical Pro-D3 capsule ingredients include:
- Vitamin D3 (colecalciferol)
- Microcrystalline cellulose
- Magnesium stearate
- Hydroxypropyl methylcellulose capsule shell
Vitamin D3 premixes may also contain small amounts of ingredients such as maltodextrin, starch and sucrose.
Liquid products typically contain:
- Sunflower oil
- Medium-chain triglycerides
- Vitamin D3 (colecalciferol)
- Orange flavour
- DL-alpha-tocopherol
Gummies contain:
- Vitamin D3
- Purified water
- Orange oil
- Pectin
- Glucose syrup
- Sugar
- Citric acid
- Sodium citrate
- Vegetable colouring concentrates
- MCT
- Carnauba wax
Always check the ingredients of the individual product before use because formulations differ between dosage forms and strengths.
Allergen and dietary information:
According to the manufacturer, the current Pro-D3 range is free from common allergens including:
- Gluten
- Wheat
- Milk
- Lactose
- Egg
- Fish
- Crustaceans
- Molluscs
- Soya
- Peanuts
- Tree nuts
- Sesame
- Mustard
- Celery
- Lupin
The range is also:
- Gelatine free
- Alcohol free
- Yeast free
Standard Pro-D3 products are suitable for vegetarians.
Products specifically labelled Pro-D3 Vegan are suitable for vegans.
Always check the individual product label if you have a known allergy or intolerance.
Important information:
Pro-D3 products are food supplements and are not a substitute for a varied, balanced diet and healthy lifestyle.
Do not exceed the recommended intake.
Do not take several Vitamin D-containing supplements together without checking the total daily or weekly Vitamin D dose.
For most adults and children aged 11 years and over, the recognised tolerable upper intake level for prolonged use is 100 micrograms / 4000 IU per day, unless a different dose has been recommended by an appropriate healthcare professional.
This is particularly important with:
- Pro-D3 4000 IU daily tablets
- Pro-D3 Vegan 3200 IU capsules
- High-strength weekly 10,000–25,000 IU products
- Other supplements containing Vitamin D
- Calcium and Vitamin D combination products
Higher doses may be used clinically for diagnosed Vitamin D deficiency, but the dose and duration should be based on appropriate medical advice and, where necessary, blood-test results.
Speak to a doctor or pharmacist before taking higher-strength Vitamin D if you:
- Have been told that you have high calcium levels
- Have high Vitamin D levels
- Have significant kidney disease
- Have a history of kidney stones
- Have sarcoidosis or another condition affecting Vitamin D metabolism
- Take medicines that may affect calcium or Vitamin D levels
- Are pregnant or breastfeeding
- Are already taking another Vitamin D-containing medicine or supplement
Taking excessive Vitamin D over a prolonged period can cause hypercalcaemia – excessively high calcium levels in the blood.
Symptoms may include:
- Nausea or vomiting
- Constipation
- Excessive thirst
- Passing urine more frequently
- Weakness
- Confusion
Prolonged excessive Vitamin D intake can damage the kidneys and other organs.
If you think you have taken significantly more Vitamin D than recommended, seek medical or pharmacist advice.
UK Vitamin D guidance:
For general prevention of deficiency, the NHS recommends that adults and children over 4 years consider taking:
- 10 micrograms / 400 IU Vitamin D daily during autumn and winter
People who have little or no exposure to sunlight or who are at increased risk of deficiency may be advised to take:
- 10 micrograms / 400 IU daily throughout the year
The dose required to treat an established Vitamin D deficiency may be considerably higher and should be determined by an appropriate healthcare professional.
Storage:
Unless the individual product states otherwise:
- Store below 25°C
- Store in a cool, dry place
- Protect from direct light
- Keep out of the sight and reach of children
- Do not use if the seal is broken
- Do not use after the expiry date
Liquid products and gummies should generally be used within 3 months after opening.
Product type: Vitamin D3 Food Supplement Range
Active nutrient: Vitamin D3 / Colecalciferol
Available formats: Capsules, tablets, liquid drops, oral liquid and gummies
Current standard strengths: 100 IU per drop to 25,000 IU per weekly dose
Dietary suitability: Vegetarian, Halal, Kosher and gluten free
Vegan options: Yes
Manufacturer: Synergy Biologics Ltd
Manufactured in: Walsall, United Kingdom
Always follow the dosage stated on the individual Pro-D3 product. Higher-strength Vitamin D products should not be taken more frequently than directed.
Pro-D3 is a range of high-quality Vitamin D3 (colecalciferol) food supplements available in a wide selection of strengths and dosage forms, including capsules, tablets, liquid drops, oral liquids, gummies and vegan formulations.
Vitamin D contributes to the maintenance of normal bones and teeth, normal muscle function and normal immune-system function, and supports the normal absorption and utilisation of calcium and phosphorus.
The range includes lower-strength daily supplements as well as higher-strength daily and weekly formulations, allowing the dose and format to be selected according to individual requirements and healthcare-professional advice.
Key features:
- Contains Vitamin D3 (colecalciferol)
- Wide range of strengths
- Daily and weekly formulations available
- Capsules, tablets, liquids, drops and gummies
- Separate vegan Vitamin D3 formulations available
- Standard Pro-D3 products are suitable for vegetarians
- Vegan products are suitable for vegans and vegetarians
- Halal suitable
- Kosher suitable
- Gluten free
- Gelatine free
- Lactose free
- Dairy free
- Soya free
- Nut and peanut free
- Manufactured in the UK
- Batch tested for quality
- Food supplement
Why Vitamin D is important:
Vitamin D contributes to:
- Maintenance of normal bones
- Maintenance of normal teeth
- Normal muscle function
- Normal function of the immune system
- Normal absorption and utilisation of calcium and phosphorus
- Maintenance of normal blood calcium levels
- The process of cell division
Vitamin D is produced naturally in the skin following exposure to sunlight, but sunlight in the UK may not provide sufficient Vitamin D throughout the year.
The NHS recommends that adults and children over 4 years should consider taking 10 micrograms (400 IU) of Vitamin D daily during autumn and winter.
People at increased risk of Vitamin D deficiency may be advised to take 10 micrograms (400 IU) throughout the year.
Higher strengths may be appropriate in some circumstances but should be selected according to individual requirements and, particularly at higher doses, healthcare-professional advice.
Pro-D3 Capsules
Pro-D3 capsules are easy-to-swallow, gelatine-free capsules containing Vitamin D3.
Daily capsules:
-
400 IU / 10 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
-
800 IU / 20 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
-
1000 IU / 25 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
-
2500 IU / 62.5 micrograms
- 30 capsules
- Usual manufacturer direction: 1 capsule daily
Vegan daily capsules:
-
Vegan 800 IU / 20 micrograms
- 30 capsules
- Plant-based Vitamin D3
- 1 capsule daily
-
Vegan 3200 IU / 80 micrograms
- 30 capsules
- Plant-based Vitamin D3
- 1 capsule daily
High-strength weekly capsules:
-
10,000 IU / 250 micrograms
- Available in packs of 10 or 30 capsules
- Manufacturer direction: 1 capsule weekly
-
20,000 IU / 500 micrograms
- Available in packs of 10 or 30 capsules
- Manufacturer direction: 1 capsule weekly
-
Vegan 20,000 IU / 500 micrograms
- 30 capsules
- Plant-based Vitamin D3
- Manufacturer direction: 1 capsule weekly
-
Pro-D3 Sport 20,000 IU
- 30 weekly capsules
- Designed for athletes
- Sport/batch-tested formulation
- Manufacturer direction: 1 capsule weekly
Take capsules with water, preferably after food.
Swallow whole.
Do not chew, open or exceed the recommended intake.
Pro-D3 Tablets
Pro-D3 tablets provide an alternative for people who prefer tablets rather than capsules.
Current strengths include:
- 400 IU / 10 micrograms – 30 daily tablets
- 800 IU / 20 micrograms – 30 daily tablets
- 1000 IU / 25 micrograms – 30 daily tablets
- 4000 IU / 100 micrograms – 30 daily tablets
- 25,000 IU / 625 micrograms – 15 weekly tablets
Daily-strength tablets are generally taken once daily according to the individual pack directions.
The 25,000 IU tablet is taken once weekly, or as advised by a healthcare professional.
Take with water, preferably after food.
Pro-D3 Liquid Drops – 100 IU per drop
Pro-D3 Liquid Drops provide a flexible way to adjust Vitamin D intake and may be particularly useful for children or people who have difficulty swallowing tablets or capsules.
Strength:
- 100 IU / 2.5 micrograms Vitamin D3 per drop
Pack size:
- 20ml
Manufacturer directions:
Adults:
- 4–10 drops daily
- Provides 400–1000 IU / 10–25 micrograms Vitamin D3
Children aged 6 months–12 years:
- 2–8 drops daily
- Provides 200–800 IU / 5–20 micrograms Vitamin D3
- Or as advised by a healthcare professional
The drops can be:
- Taken directly
- Mixed with food
- Mixed with water or another suitable drink
Shake well before use.
Once opened, use within 3 months.
A separate Vegan Pro-D3 100 IU/drop 20ml formulation is also available.
Pro-D3 Liquid – 2000 IU/ml
A higher-strength liquid Vitamin D3 formulation supplied with a dosing syringe.
Strength:
- 2000 IU / 50 micrograms per 1ml
Available pack sizes:
- 50ml
- 100ml
Manufacturer directions:
Adults:
- 0.5–1ml daily
- Provides 1000–2000 IU / 25–50 micrograms Vitamin D3
Children aged 6 months–12 years:
- 0.2–0.4ml daily
- Provides 400–800 IU / 10–20 micrograms Vitamin D3
- Or as advised by a healthcare professional
Shake well before use and measure using the syringe provided.
Can be taken directly or mixed into food or drink.
Once opened, use within 3 months.
A Vegan Pro-D3 Liquid 2000 IU/ml 50ml formulation is also available.
Pro-D3 Forte Liquid – 3000 IU/ml
A concentrated liquid Vitamin D3 supplement for adults who require a higher-strength liquid formulation.
Strength:
- 3000 IU / 75 micrograms per 1ml
Pack size:
- 50ml
Manufacturer directions for adults:
- 0.5–1ml daily
- Provides 1500–3000 IU / 37.5–75 micrograms Vitamin D3
Shake well before use and measure with the syringe provided.
Can be consumed directly or mixed with food or drink.
Once opened, use within 3 months.
Pro-D3 Vitamin D3 Gummies
Pro-D3 Gummies provide Vitamin D3 in a chewable, orange-flavoured format.
Strength:
- 1000 IU / 25 micrograms Vitamin D3 per gummy
Pack size:
- 60 gummies
Adults:
- Chew 1–3 gummies daily
- Provides 1000–3000 IU / 25–75 micrograms Vitamin D3
Children aged 3–12 years:
- Chew 1 gummy daily
- Or as advised by a healthcare professional
The gummies are:
- Gelatine free
- Pectin based
- Suitable for vegetarians
- Halal suitable
- Kosher suitable
They contain glucose syrup and sugar, so are not sugar free.
Once opened, use within 3 months.
Vegan Pro-D3 Range
The Pro-D3 Vegan range uses plant-based Vitamin D3 and is suitable for vegan diets.
Current vegan products include:
- Vegan 800 IU Capsules – 30
- Vegan 3200 IU Capsules – 30
- Vegan 20,000 IU Weekly Capsules – 30
- Vegan Liquid Drops 100 IU/drop – 20ml
- Vegan Liquid 2000 IU/ml – 50ml
These products are suitable for:
- Vegans
- Vegetarians
- Halal diets
- Kosher diets
- Gluten-free diets
Ingredients:
Ingredients vary according to the individual formulation.
Typical Pro-D3 capsule ingredients include:
- Vitamin D3 (colecalciferol)
- Microcrystalline cellulose
- Magnesium stearate
- Hydroxypropyl methylcellulose capsule shell
Vitamin D3 premixes may also contain small amounts of ingredients such as maltodextrin, starch and sucrose.
Liquid products typically contain:
- Sunflower oil
- Medium-chain triglycerides
- Vitamin D3 (colecalciferol)
- Orange flavour
- DL-alpha-tocopherol
Gummies contain:
- Vitamin D3
- Purified water
- Orange oil
- Pectin
- Glucose syrup
- Sugar
- Citric acid
- Sodium citrate
- Vegetable colouring concentrates
- MCT
- Carnauba wax
Always check the ingredients of the individual product before use because formulations differ between dosage forms and strengths.
Allergen and dietary information:
According to the manufacturer, the current Pro-D3 range is free from common allergens including:
- Gluten
- Wheat
- Milk
- Lactose
- Egg
- Fish
- Crustaceans
- Molluscs
- Soya
- Peanuts
- Tree nuts
- Sesame
- Mustard
- Celery
- Lupin
The range is also:
- Gelatine free
- Alcohol free
- Yeast free
Standard Pro-D3 products are suitable for vegetarians.
Products specifically labelled Pro-D3 Vegan are suitable for vegans.
Always check the individual product label if you have a known allergy or intolerance.
Important information:
Pro-D3 products are food supplements and are not a substitute for a varied, balanced diet and healthy lifestyle.
Do not exceed the recommended intake.
Do not take several Vitamin D-containing supplements together without checking the total daily or weekly Vitamin D dose.
For most adults and children aged 11 years and over, the recognised tolerable upper intake level for prolonged use is 100 micrograms / 4000 IU per day, unless a different dose has been recommended by an appropriate healthcare professional.
This is particularly important with:
- Pro-D3 4000 IU daily tablets
- Pro-D3 Vegan 3200 IU capsules
- High-strength weekly 10,000–25,000 IU products
- Other supplements containing Vitamin D
- Calcium and Vitamin D combination products
Higher doses may be used clinically for diagnosed Vitamin D deficiency, but the dose and duration should be based on appropriate medical advice and, where necessary, blood-test results.
Speak to a doctor or pharmacist before taking higher-strength Vitamin D if you:
- Have been told that you have high calcium levels
- Have high Vitamin D levels
- Have significant kidney disease
- Have a history of kidney stones
- Have sarcoidosis or another condition affecting Vitamin D metabolism
- Take medicines that may affect calcium or Vitamin D levels
- Are pregnant or breastfeeding
- Are already taking another Vitamin D-containing medicine or supplement
Taking excessive Vitamin D over a prolonged period can cause hypercalcaemia – excessively high calcium levels in the blood.
Symptoms may include:
- Nausea or vomiting
- Constipation
- Excessive thirst
- Passing urine more frequently
- Weakness
- Confusion
Prolonged excessive Vitamin D intake can damage the kidneys and other organs.
If you think you have taken significantly more Vitamin D than recommended, seek medical or pharmacist advice.
UK Vitamin D guidance:
For general prevention of deficiency, the NHS recommends that adults and children over 4 years consider taking:
- 10 micrograms / 400 IU Vitamin D daily during autumn and winter
People who have little or no exposure to sunlight or who are at increased risk of deficiency may be advised to take:
- 10 micrograms / 400 IU daily throughout the year
The dose required to treat an established Vitamin D deficiency may be considerably higher and should be determined by an appropriate healthcare professional.
Storage:
Unless the individual product states otherwise:
- Store below 25°C
- Store in a cool, dry place
- Protect from direct light
- Keep out of the sight and reach of children
- Do not use if the seal is broken
- Do not use after the expiry date
Liquid products and gummies should generally be used within 3 months after opening.
Product type: Vitamin D3 Food Supplement Range
Active nutrient: Vitamin D3 / Colecalciferol
Available formats: Capsules, tablets, liquid drops, oral liquid and gummies
Current standard strengths: 100 IU per drop to 25,000 IU per weekly dose
Dietary suitability: Vegetarian, Halal, Kosher and gluten free
Vegan options: Yes
Manufacturer: Synergy Biologics Ltd
Manufactured in: Walsall, United Kingdom
Always follow the dosage stated on the individual Pro-D3 product. Higher-strength Vitamin D products should not be taken more frequently than directed.

