VITAMINS
Vitamin B2 (riboflavin 5-phosphate)
Riboflavin 5’-phosphate is the active form of vitamin B2 that supports energy metabolism and eye health.
Also known as: riboflavin, riboflavin 5-phosphate, R5P, vitamin B-2
At a glance
- Form
- Riboflavin 5-phosphate
- Category
- Vitamins
- In an apiece formula
- 25 mg a day (you can change it)
- Recommended intake
- 1.1 mg (women), 1.3 mg (men)
- Upper limit
- No established UL
- Studied for
- Energy & vitality*
- Reference
- NIH ODS: Riboflavin fact sheet
Who should be careful
Always check with your doctor or pharmacist before adding a supplement if you take medication, are pregnant or nursing, or have a health condition. Stay under the upper limit from all sources combined, including multivitamins.
Symptoms it’s studied for
From the Journal
- Folic acid vs methylfolate: does your MTHFR gene matter?
How folic acid and L-methylfolate differ, what an MTHFR variant does and doesn't mean, what the pregnancy guidance actually says, and the upper limit for folic acid.
Questions
How much vitamin B2 a day?
apiece formulas usually include 25 mg a day. The recommended intake for adults is 1.1 mg (women), 1.3 mg (men). Upper limit: No established UL.
What is vitamin B2 used for?
Riboflavin 5’-phosphate is the active form of vitamin B2 that supports energy metabolism and eye health. In apiece it is part of formulas for Energy & vitality.*
Who should be careful with vitamin B2?
Most adults can take it at the usual amount, but check with your doctor or pharmacist if you take medication, are pregnant or nursing, or have a health condition.
Can I get vitamin B2 in a personalized supplement?
Yes. apiece builds one daily blend around your goals and, if you have them, your lab results. Vitamin B2 can be part of it at the amount listed, with every ingredient shown and never more than 10 capsules a day.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is general information, not medical advice. Check with your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or nursing, or have a health condition. Updated 2026-10-21.