Riboflavin B2 R5P Capsules
The active form of vitamin B2.
60 capsules
60 day supply
per day £0.34 per capsule
Guaranteed additive free
Highest purity
Practitioner grade
Free UK delivery on 2 or more items
14 day returns
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Riboflavin 5-phosphate, or R5P, is the active form of vitamin B2. It is the form the body makes from riboflavin before it can be used.
Vitamin B2 is needed for energy release, for the skin, for vision and for the nervous system, and it contributes to the reduction of tiredness and fatigue. Low intake is common in those who eat little dairy or meat.
Each capsule provides a high dose of R5P with no binders, in a vegetable capsule suitable for vegans. It is often chosen by people who want R5P at a dose that one capsule a day covers.
| Each capsule contains: | %NRV* | |
|---|---|---|
| Riboflavin (Vitamin B2) | 47.5 mg | 3393% |
* Nutrient Reference Value
Suitable for men.
Suitable for women.
Consult your healthcare practitioner before use if pregnant or breastfeeding.
Suitable for vegetarians.
Suitable for vegans.
No gluten containing ingredients.
No nut containing ingredients.
No dairy containing ingredients.
If you are taking prescribed medicines or under medical supervision, consult your healthcare practitioner before use.
Store in a cool dry place.
Keep out of reach of children.
This information is not a substitute for advice from a healthcare practitioner.
This product should not be used as a substitute for a varied diet.
Once opened, consume within 3 months.
UK delivery is free when you order 2 or more items. A single item goes by Royal Mail Tracked 48 for £3.95. With 3 or more items, Tracked 24 is free. With 4 or more items, Special Delivery is free. Special Delivery arrives the next working day if you order before 2pm.
Delivery and worldwide shipping options are shown at checkout, with duties and taxes included.
Unopened items in their original packaging can be returned within 14 days of delivery.
Quality promise
Why clinical grade matters
- ✓ GMP certified, pharmaceutical grade manufacturing
- ✓ Made in UK cleanroom facilities, ISO 9001 & ISO 14001 accredited
- ✓ No fillers, binders or additives, only active ingredients
- ✓ Fully traceable from raw material to finished product
- ✓ Non-GM, non-irradiated, 100% green energy manufacturing
Evidence
What the research shows
Our Health Reference Library is an ever-growing collection of peer-reviewed research and health guidance.
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Frequently asked questions
What is the difference between R5P and plain riboflavin?
R5P is the active coenzyme form of vitamin B2, used directly without liver conversion. Plain riboflavin must first be phosphorylated before it can work in the FMN and FAD flavocoenzymes.
How much B2 is in each capsule?
47.5mg as riboflavin 5 phosphate per capsule, one daily, 60 per pot. For a gentler drop-based dose see the R5P Liquid at 1.6mg per serving.
Why are higher B2 intakes of interest?
Riboflavin has been studied at higher intakes in research settings. The authorised claims are that riboflavin contributes to normal energy-yielding metabolism and to the reduction of tiredness and fatigue.
Why does B2 turn urine yellow?
Riboflavin is a fluorescent yellow compound; any excess is excreted in urine, turning it bright yellow. This is harmless and expected.
Who are R5P capsules best for?
People who want the active form of vitamin B2 at a higher fixed dose than the liquid gives, people taking methylfolate and B12 who want the third methylation cofactor in the same routine, and vegans. If you only want a maintenance level, the Vitamin B2 R5P Liquid at 1.6 mg per serving is the gentler option.
Does R5P turn urine yellow?
Yes. Riboflavin turns urine bright yellow within hours of taking it. This is harmless and simply shows the B2 has been absorbed.
Why capsules rather than tablets?
Tablets need binders, fillers and a coating to hold their shape. A capsule is a cellulose shell around the powder, so it carries no binders and breaks down quickly once swallowed.
