Skip to content

 Free Shipping on orders over £50

Pharmacist-Founded Health & Wellness

As Seen In: Dragon's Den | GQ | Harrods

+2500 reviews ★★★★★

OQO® Vitamin D3 4000 IU High Strength | 400 Tablets | Vegan

OQO® Vitamin D3 4000 IU High Strength | 400 Tablets | Vegan

Regular price £9.99
Sale price Regular price
High-strength Vitamin D3

Maximum-strength daily Vitamin D3, made simple

A clearly measured once-daily tablet with authorised Vitamin D benefits and more than a year of servings in every bottle.

Daily easy daily serving
1 simple step
120 servings per pack

High-strength daily serving

Each tablet provides 4000 IU, equivalent to 100µg of Vitamin D3.

Normal immune function

Vitamin D contributes to the normal function of the immune system.

Bones, teeth and muscles

Vitamin D contributes to the maintenance of normal bones, teeth and muscle function.

Calcium absorption

Vitamin D contributes to the normal absorption and utilisation of calcium and phosphorus.

More than a year supplied

Four hundred tablets provide over a year of daily servings at one tablet per day.

Vegan-friendly format

A small, once-daily tablet made for vegan and vegetarian routines.

High-strength routine

One tiny tablet, once daily

Each tablet provides 100µg (4000 IU) of Vitamin D3. This is the adult daily upper limit stated by the NHS, so do not combine it with other Vitamin D supplements unless advised by a healthcare professional.

  1. 1
    Take one serving

    Follow the directions on the product label.

  2. 2
    Pair with a meal

    Take preferably with food as part of your routine.

  3. 3
    Stay consistent

    Keep the pack somewhere visible to help make it a habit.

What is inside

A clearly measured daily formula

Daily serving Clearly measured Easy routine
Know your daily amount

High strength with clear guidance

A 100µg serving reaches the NHS adult daily upper limit. Check your total intake across every supplement you use.

Feature OQO D3 4000 IU Typical separate products Powders or mixes
Daily amount One small tablet Varies by product Measure each serving
Vitamin D3 4000 IU / 100µg Varies by product Varies by product
Supply 400 daily servings Often smaller packs Depends on pack size
Important Adult upper daily limit Check total Vitamin D intake Check total Vitamin D intake
Good to know

Questions before you start?

How should I take it?

Follow the directions on the product label.

How long does one pack last?

The supply depends on the serving directions shown on the label.

How should I store it?

Store in a cool, dry place away from direct sunlight.

Is this a replacement for a balanced diet?

No. Food supplements should not replace a varied diet and healthy lifestyle. Keep out of reach of children.

High strength, clearly measured

Stay stocked for every season

One tablet daily. 4000 IU of Vitamin D3. More than a year of servings in one bottle.

⭐ Rated 4/5 by happy customers
🎁 Exclusive perks when you subscribe
🚚 Free delivery on orders over £50

Loved by Customers

Trusted by real people with consistent 4★+ reviews

Premium Ingredients

Made with high-quality, carefully selected ingredients you can trust.

Science-Backed Formulas

Developed by pharmacists to support overall wellness.

No Nasties

Free from artificial colours and unnecessary additives.

Discover more in our FAQ

Is 4000 IU safe to take every day?

4000 IU (100 µg) is the upper daily limit considered safe for adults by UK and EU authorities, so it should not be exceeded. Take 1 tablet daily and do not combine with other vitamin D supplements. If you're pregnant, breastfeeding or on medication, check with your GP first.