Vitamin B2 R5P Liquid
The active form of vitamin B2.
100ml
138 day supply
per day
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.
This liquid contains R5P in purified water with citric acid. It is often chosen by people who want a small daily dose they can adjust, or who prefer R5P to plain riboflavin.
1 serving = 10 drops | 138 servings per 100ml
| 10 drops contains: | %NRV* | |
|---|---|---|
| Riboflavin (Vitamin B2) | 1.6 mg | 114% |
* 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 refrigerator once opened.
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 (riboflavin 5 phosphate) is the active coenzyme form of vitamin B2. Plain riboflavin must first be converted by the body; R5P participates directly in flavocoenzyme reactions without conversion. This product contains R5P only.
How much B2 is in each serving?
A 10-drop serving provides 1.6mg of riboflavin as R5P (114% NRV). The 100ml bottle provides 138 servings. For higher intakes, the capsule form provides 47.5mg per capsule.
Who is the liquid form best for?
The liquid suits those who want a gentle daily maintenance dose, children, anyone who finds capsules difficult to swallow, or anyone building a liquid supplement routine. The only ingredients are purified water, R5P and citric acid.
Is B2 R5P the same as riboflavin?
R5P is riboflavin 5-phosphate, the coenzyme form of vitamin B2 that the body makes from riboflavin. This liquid contains R5P only, 1.6mg per 10-drop serving, not plain riboflavin.
How much R5P should I take?
Ten drops a day gives 1.6 mg, just over the 1.4 mg reference intake. UK requirements are 1.3 mg a day for men and 1.1 mg for women, so one serving covers a maintenance level. Riboflavin has no established upper intake level because harm has not been shown at high doses; if you want more than the liquid gives, the capsules provide 47.5 mg.
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 drops rather than tablets?
Drops let the amount be adjusted one drop at a time, and they suit anyone who cannot swallow tablets. Tablets need binders and a coating to hold their shape; this liquid contains only the active ingredient and its carrier.
