Vitamin D3 4000IU Bloom

What Vitamin D3 4000IU Bloom Is

Vitamin D3 4000IU Bloom is the higher-strength vitamin D supplement in the BLOOMLY range. The strength appears in the name because strength is the main thing people compare when choosing a vitamin D product.

4000 IU And 100 Micrograms Are The Same Amount

This causes more confusion than anything else on a vitamin D shelf, so it is worth setting out plainly.

Vitamin D is written in two units. IU means International Units, an older measure still widely used, particularly on the front of packs. µg or mcg means micrograms, the metric measure used in nutrition labelling in the United Kingdom and Europe.

The relationship between them is fixed: 1 µg = 40 IU.

• 25 µg = 1000 IU
• 50 µg = 2000 IU
• 75 µg = 3000 IU
• 100 µg = 4000 IU

So a pack advertising "4000 IU" and a pack advertising "100 mcg" are advertising the same amount. If you are comparing products, convert them both to one unit first — otherwise the larger-looking number wins for no reason.

Choosing Between The Strengths In This Range

There are two strengths of vitamin D3 in the range, plus a vegan option at the lower strength. The difference between them is quantity. All are vitamin D3, which is cholecalciferol.

Higher is not automatically better, and this is the one place on this page where we would rather you stopped and thought than simply added to basket. If you already take a multivitamin, a combined D and K product, or anything else containing vitamin D, the amounts add together — and that is the most common way people end up taking more than they meant to.

Which strength suits you is a question for your doctor or pharmacist. They can look at everything you take, which a product page cannot.

D2, D3, Lanolin And Lichen

D2 is ergocalciferol, typically derived from yeast or fungi. D3 is cholecalciferol, the form used in most supplements.

Most D3 on the market is derived from lanolin, the oil from sheep's wool, which means it is not suitable for vegans. D3 can also be made from lichen, which is plant-based. This is a raw-material difference, not a labelling one, and it is why our range carries a separate vegan D3 rather than describing this one as suitable for everyone.

Why Vitamin D Comes Up So Much In The United Kingdom

Vitamin D can be obtained from food and also produced by the body through skin exposure to sunlight. Dietary sources are relatively few — oily fish, egg yolk, liver, and fortified foods such as some spreads and cereals.

At the latitude of the United Kingdom, usable sunlight varies considerably between summer and winter. That seasonality is why vitamin D is discussed here more than in sunnier countries, and why many people take it specifically in the darker months.

How It Fits Into Your Routine

Vitamin D is fat-soluble, so it is generally suggested to be taken with a meal containing some fat. It attaches to a mealtime rather than needing a slot of its own.

What You Get In Each Pack

A single pack, a 2 pack and a 4 pack. Identical product in each; only the quantity changes. Prices are shown on this page before you add anything to your basket.

Who It's For

Adults who want the higher-strength vitamin D3 in the range, and who have checked what else in their routine already contains vitamin D.

If you follow a vegan diet, choose the vegan D3 instead — standard D3 is usually derived from lanolin. Do not exceed the recommended daily dose, and speak to your doctor before taking it if you are pregnant, breastfeeding, taking medication or under medical supervision.

Questions, Answered

Is 4000 IU the same as 100 micrograms?
Yes. 1 µg equals 40 IU, so 100 µg is 4000 IU.

How do I convert between IU and micrograms?
Divide IU by 40 to get micrograms, or multiply micrograms by 40 to get IU.

What is the difference between 1000 IU and 4000 IU?
Quantity. Both are vitamin D3. Which suits you is a question for your doctor or pharmacist, particularly if you take other products containing vitamin D.

Can vitamin D add up across different supplements?
Yes. Multivitamins and combined products often contain vitamin D, and the amounts add together. Check the labels of everything you take.

What is the difference between vitamin D2 and D3?
D2 is ergocalciferol, usually from yeast or fungi. D3 is cholecalciferol, the form used in most supplements.

Is vitamin D3 vegan?
Not usually. Most D3 is derived from lanolin, from sheep's wool. D3 from lichen is plant-based, which is why a separate vegan product exists in our range.

Which foods contain vitamin D?
Oily fish, egg yolk and liver, plus fortified foods such as some spreads and cereals.

Should I take it with food?
Vitamin D is fat-soluble and is generally suggested to be taken with a meal containing some fat. Follow the directions given on the pack.

Important Information

Storage: Store in a cool, dry place. Store out of the reach of young children.

Warnings: Do not exceed the recommended daily dose. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Store out of the reach of young children. If you are pregnant, breastfeeding, taking medication or under medical supervision, consult your doctor before use.