Vitamin D

Looking for the ideal Vitamin D supplement? At Welzo, your health is our priority. Every Vitamin D supplement we provide follows the UK GMP standards, undergoes third-party testing for purity and efficacy, ensuring the ideal products for your well-being. Vitamin D, also known as Calciferol, ergocalciferol (D2), or Cholecalciferol (D3), helps maintain the health of your bones, teeth, and muscles. Further, a strong immune system is developed. At Welzo, we have a trusted selection of Vitamin D2 and D3 supplements, in the form of softgels, drops, sprays, and vegan tablets.

What is Vitamin D?

Vitamin D ensures your body uses the required amount of calcium and phosphate( the two essential minerals) for healthy &strong bones. Vitamin D within the skin comes from sunlight, but in the UK, most people don't get the required exposure, especially during October-March every year, causing deficiencies and health problems.

The NHS recommends 10 micrograms (400 IU) per day for adults during the autumn and winter seasons of the year.

Vitamin D Deficiency is related to bone loss (termed Osteoporosis), tiredness, and low immunity (NIH).

The reference range of vitamin D monitors the immune system and decreases inflammation ( Journal of Clinical Endocrinology & Metabolism)

Benefits of Vitamin D Supplements

Aids Bones and Muscles Health

Vitamin D helps the body get enough calcium and phosphate, both of which are essential for maintaining strong bones and healthy muscle functions, as per the NHS.

Helps Cover Seasonal Sunlight Shortfall

During months with limited daylight (and when skin covers up), the body’s natural production of Vitamin D drops. The UK health journal recommends supplementation for general well-being during these periods.

Aids Wellness

Emerging research suggests that low Vitamin D levels are linked with a higher risk of falls, bone fractures, and possibly other health outcomes, as per NIH.

Features of Our Collection

Finest Vitamin D3 (cholecalciferol) sourced for optimal effect
Vegan options available
Range of doses (e.g., daily low-dose, higher-dose when prescribed/ required)
Third-party testing for efficacy, purity, and safety
Clear labelling and UK-based compliance

Why is Vitamin D Important to us?

According to the Flynn Forum research, 41.9% of the UK population have inadequate vitamin D levels, and 13.5% of the population have vitamin D deficiency.

Immunity cover, monitoring immune responses, and decreasing infection risks.

Elevates spirit and energy – low levels are known to be causes for tiredness and feeling low, especially in seasons like winter.

Balances metabolism and heart health, balances metabolic activities and cardiac functions.

Integrated Support: consuming Vitamin D with Zinc boosts immune system responses, supporting recovery during medical illness or post-medical procedures.

According to Mayo Clinic, Vitamin D prevents joint conditions: Osteoporosis, Osteomalacia, and rickets in children, which occur due to a lack of Vitamin D in the body.

How to Use Vitamin D Supplements

Consume the supplement with a meal containing fats to boost absorption (as Vitamin D is fat-soluble).
The daily recommendation for healthy adults is 10 micrograms (400 IU) per day, specifically during autumn and winter seasons, as per NHS.
For people with low Vitamin D levels, higher doses are suggested with a healthcare professional’s advice.
Ensure daily usage for best results. If you miss any dose, make sure to maintain the weekly required dosage.
If you are pregnant, breastfeeding, on medication (e.g., for osteoporosis or for fat malabsorption), or have medical conditions, consult your healthcare professional before use.

What are the Different Types of Vitamin D Available?

Vitamin D2 comes from plant sources, fungi (i.e., mushrooms and fortified foods), making it suitable for vegans.

Vitamin D3 comes from animal sources (i.e., fish, egg, and liver), and when your skin gets enough sun exposure.

Both types of Vitamin D play their role and ensure effective utilization of calcium and phosphate.

Vitamin D3 increases vitamin D in your blood and is often recommended in supplements.

Both forms are safe and approved for people and must be taken as per recommendations.

Best Sellers of Vitamin D Supplements

Standard Vitamin D3 daily capsules are suitable for general adult use

Vegan D3 softgels, for those avoiding animal-derived ingredients

High Power Vitamin D formulations, for individuals managing low levels under guidance

Vitamin D + K2 combos, for those seeking combined bone-cardio support

Check out our Best Seller Vitamin D Supplements

Statistics, Research, and Expert Insights on Vitamin D

A systematic review suggests that Vitamin D supplementation increases bone mineral density at main sites (femoral neck, lumbar spine, total hip) in adults (MDPI).

UK government health guidance states that “Everyone is advised to take a daily Vitamin D supplement in autumn and winter to protect their general health, in particular bone, muscle health and overall well-being.” (GOV UK).

“Vitamin D is necessary for optimal bone mineralisation … Yet aside from the skeletal effects, observational studies suggest low levels have been linked to several diseases and higher all-cause mortality.” E. Rebelos et al., The Role of Vitamin D in Health and Disease (2023) (PubMed).

How We Select Our Vitamin D Collection on Welzo

At Welzo, every Vitamin D product is selected with care. Our criteria include:

Verified and potent sources of Vitamin D3 (cholecalciferol)
UK GMP-certified manufacturing
Independent third-party laboratory testing for purity and label accuracy
Clear labelling with dosage and source information
Transparent sourcing and formulation quality
Positive customer feedback and strong expert endorsements

Trusted by Experts and Verified Vitamin D Quality on Welzo

Healthcare professionals across the UK trust Welzo’s range of Vitamin D supplements — we maintain rigorous manufacturing, testing, and compliance standards so you can buy Vitamin D online knowing you’re choosing a premium, reliable product.

Vitamin D Supplement Reviews

Visit our Welzo Reviews Page to read genuine customer testimonials about our Vitamin D products.

Internal Links to Trust Pages

FAQs (Frequently Asked Questions)

Q1. How much vitamin D do I require per day?

The adults need at least 10 micrograms (400 IU) per day, as per the NHS. People with low sun exposure may need supplements throughout the year.

Q2. Can I get the required vitamin D from the sun?

Not usually. Between October- March, the sun in the UK is inadequate for your body to make vitamin D naturally, hence the NHS recommends you take supplements during this period.

Q3. Do vegan-based vitamin D supplements have any effects?

Yes, D3 (from lichen) and D2 raise blood levels of vitamin D

Q4. Can I take a vitamin D supplement with other supplements?

Yes, it does not have any effect on calcium and omega-3s. Just make sure that your daily dose does not exceed the recommended dose on the pack or as prescribed by your healthcare professional.

Q5. Can I take a high level dose of vitamin D?

Yes, more is not necessarily better all the time. Consuming over 100 micrograms (4000 IU) a day regularly can cause raised blood levels of calcium and adverse effects like nausea or kidney problems.

The content below has been reviewed by an experienced Nutrition Expert. All our products meet UK GMP standards and are tested for quality through third-party testing. Last Updated on 28th October 2025