Key takeaways
- Riboflavin is a water-soluble B vitamin that becomes the coenzymes FAD and FMN, electron carriers in the redox reactions involved in energy production, cellular antioxidant function and numerous metabolic pathways.
- Hoola supplies vitamin B2 as riboflavin sodium phosphate, 1.37 mg per gram and 13.7 mg in the 10 g daily serve. Both figures are published.
- The phosphate form is already active, so your body does not need additional conversion steps before using it.
- B2 sits inside an active B-complex that supports normal energy metabolism and healthy skin, hair and nails, not as a standalone dose.
- The body stores little riboflavin, and most is used immediately with the excess passed in urine, so a consistent daily serve matters more than a large occasional one.
What is vitamin B2, and what does riboflavin do in the body?
Vitamin B2 is riboflavin, a water-soluble B vitamin. Think of it as the wiring behind your power supply. Riboflavin is the precursor of two coenzymes, FAD and FMN, and riboflavin is primarily found in the body as an integral component of those two. Coenzymes derived from riboflavin are termed flavocoenzymes, and enzymes that use one are called flavoproteins.
Living organisms derive most of their energy from redox reactions, processes that involve the transfer of electrons. FAD and FMN act as the electron carriers in those reactions, across energy production, cellular antioxidant function and numerous metabolic pathways. Flavocoenzymes participate in redox reactions in numerous metabolic pathways. They are critical for the metabolism of carbohydrates, lipids and proteins. FAD is part of the electron transport (respiratory) chain, which is central to energy production.
That is why B2 belongs in an active B-complex rather than off on its own. The complex supports normal energy metabolism and the conversion of food into usable energy, supports the nervous system, supports healthy red blood cell formation (B6, B12, folate), supports cognitive performance, and supports healthy skin, hair and nails (biotin, B2, B3).
How does vitamin B2 fit a day that already feels full?
It works upstream of everything you are trying to do. Vitamin B2 is an important nutrient that helps your body metabolise carbohydrates, fats and proteins and supports energy levels. That 3pm dip is not a character flaw. It is fuel handling.
Vitamins are compounds you must have for growth and health. They are needed in small amounts only and are usually available in the foods that you eat. Vitamin B2 is naturally present in foods, added to foods, and available as a supplement. Bacteria in the gut can produce small amounts of riboflavin, but not enough to meet dietary needs. So the supply is a daily job, not a background process you can ignore.
We designed Hoola to support energy production and stamina in a way that feels steady, not stressed. If something destabilises the nervous system, it is not energy, it is stress. B2 is one of the quiet parts of that: no jolt, no spike, just the machinery that maintains and supports energy production doing its work while you get on with your morning.
What form and how much vitamin B2 is in one Hoola serve?
Hoola contains riboflavin sodium phosphate at 1.37 mg per gram, which is 13.7 mg in the 10 g daily serve. For most adults, the recommended daily intake of vitamin B2 is 1.1 to 1.3 milligrams (mg). A UL has not been established for riboflavin, because a toxic level has not been observed from food sources or from longer-term intakes of high-dose supplements.
No proprietary blends. Every ingredient is delivered at a clinically efficacious dose, and every quantity is published. Every per-serve figure is the per-gram figure times ten. Both are published.
Hoola is a Listed Medicine on the Australian Register of Therapeutic Goods, AUST L 508472, ARTG start date 8 August 2025, sponsor Hoola Australia Pty Ltd. The certificate lists all 27 active ingredients with exact quantities per gram. Anyone can look up AUST L 508472 on the public ARTG register and check every number.
Why did Hoola choose riboflavin sodium phosphate?
Because it is already in the phosphate form the body works with. Riboflavin is primarily found as an integral component of the coenzymes FAD and FMN. Starting from a phosphorylated form means fewer steps between the scoop and the work.
We use the same principle across the B group: pyridoxal 5-phosphate for B6, levomefolate for folate, mecobalamin for B12 and riboflavin sodium phosphate for B2, so they are ready for the body to use without additional conversion steps. Hoola uses active and bioavailable forms wherever possible, in line with Australian quality manufacturing standards.
The point of a form choice is that the nutrient does something once it is in you. We pick bioavailable forms your body can actually use, at clinically efficacious dosages, and we publish the numbers. Small ingredients, real work.
How does vitamin B2 work with the rest of the Hoola formula?
B2 is a connector. Riboflavin and its derivatives are important for the body's handling of other nutrients, including conversion of vitamin B6 to its bioactive form, pyridoxal phosphate, conversion of tryptophan to niacin, and conversion of methylenetetrahydrofolate (MTHF) to methylTHF by the enzyme methyleneTHF reductase (MTHFR). FAD is required as a cofactor for MTHFR, a key folate-metabolizing enzyme in folate and related one-carbon metabolism. Flavocoenzymes also function as co-enzymes for key reactions in the catabolism of fuel molecules, such as ß-oxidation of fatty acids and the Krebs cycle, and in certain biosynthetic pathways such as fatty acid synthesis.
That is why the B group in Hoola sits together rather than apart. Where a traditional supplement lifts calm or energy on its own, Hoola blends TGA listed nutrients, nootropics and adaptogens to support the dual state modern life asks for. Hoola is designed as a single, balanced daily dose, not a collection of separate supplements, and the value sits in how the ingredients work together.
Alongside B3 and biotin, B2 also helps maintain and support skin health, integrity and structure. Tiny nutrients, doing big things behind the scenes.
Who tends to pay attention to vitamin B2?
People who want their intake covered rather than assumed. Most people get enough vitamin B2 from their diet in the United States. However, some people either do not get enough from their diet or have trouble absorbing it. Riboflavin deficiency occurs commonly in low- and middle-income countries.
There is also no routine check to reassure you. Riboflavin status is not routinely measured in healthy people. Urinary excretion levels can decrease with age and increase with exposure to stress and certain drugs, and the amount excreted strongly reflects recent intake.
Hoola is for someone looking to support their body and mind with a premium multivitamin: someone who wants more out of life, more balance, more adventure and more support. It is built for modern lives, busy schedules and high ambition, for people who want to perform without the crash, and it helps you feel bright, steady in mind, clear in thought and energised in action.
How should you take vitamin B2 day to day?
Daily, in the morning. Mix one 10 g scoop into 300-400 ml of cold water each morning. Best taken in the morning or early afternoon, and avoid close to bedtime due to the caffeine.
Consistency does the heavy lifting, because riboflavin does not stockpile. Most riboflavin is used immediately and not stored in the body, so excess amounts are excreted in the urine. The body can store only small amounts of riboflavin, and urinary excretion reflects dietary intake until tissues are saturated.
There is no half serve, no double serve and no weekly total. Hoola is one 10 g scoop a day. Consistency over intensity, and most of our customers feel the biggest benefits with consistency. One scoop, one glass of cold water, one less decision before 8am.
Frequently asked questions
What foods are the best sources of vitamin B2?
Milk and dairy products, fish, meats, green leafy vegetables, and whole grain and enriched cereals and bread are all sources of riboflavin. It is also found in eggs, mushrooms and spinach, and in many fortified cereals and breads. Food processing may destroy some vitamins, although little riboflavin is lost from foods during ordinary cooking.
What does vitamin B2 deficiency look like?
Because riboflavin assists many enzymes with various daily functions throughout the body, a deficiency can lead to health problems. Riboflavin deficiency occurs commonly in low- and middle-income countries. Riboflavin status is not routinely measured in healthy people. Where it is measured, total riboflavin excretion in healthy, riboflavin-replete adults is at least 120 mcg/day, and a rate of less than 40 mcg/day indicates deficiency.
What is vitamin B2 called on a supplement label?
Riboflavin. It is a water-soluble B vitamin, also known as vitamin B2. Riboflavin is also found as an ingredient in other supplements, such as some multivitamins and B-complex vitamins. On the Hoola label it appears as riboflavin sodium phosphate (vitamin B2). The ARTG certificate lists all 27 active ingredients with exact quantities per gram, and anyone can look up AUST L 508472 on the public ARTG register and check every number.
What do vitamin B2 and B12 do together?
They both sit in the active B-complex, which supports normal energy metabolism and the conversion of food into usable energy, supports the nervous system, supports healthy red blood cell formation (B6, B12, folate), supports cognitive performance, and supports healthy skin, hair and nails (biotin, B2, B3). In Hoola, B2 is present as riboflavin sodium phosphate at 13.7 mg per 10 g serve and B12 as mecobalamin at 50 mcg, which is 0.05 mg.
How much vitamin B2 do adults need each day?
For most adults, the recommended daily intake of vitamin B2 is 1.1 to 1.3 milligrams (mg). Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons.
What should you look for in a vitamin B2 supplement?
Published quantities, an active form and a verifiable listing. We publish every quantity and deliver every ingredient at a clinically efficacious dose. We use active B forms, including pyridoxal 5-phosphate (B6), levomefolate (folate), mecobalamin (B12) and riboflavin sodium phosphate (B2), so they are ready for the body to use without additional conversion steps. Hoola is a Listed Medicine on the Australian Register of Therapeutic Goods, AUST L 508472, ARTG start date 8 August 2025, sponsor Hoola Australia Pty Ltd.
Does vitamin B2 come as a capsule, tablet or powder?
All three. Riboflavin is available as a dietary supplement in various strengths and dosage forms, and in a variety of forms over the counter. Hoola is a powder, because a 10 g daily dose of actives does not fit a practical capsule count.
What is riboflavin used for?
Riboflavin, vitamin B2, is commonly used to increase vitamin B2 levels. It is needed to help break down carbohydrates, proteins and fats, and it plays an important role in helping your cells grow and function properly.
Why does vitamin B2 turn your urine bright yellow?
Because you pass what you do not use. Most riboflavin is used immediately and not stored in the body, so excess amounts are excreted in the urine, and an excess of dietary riboflavin, usually from supplements, can cause urine to become bright yellow. The colour is in the name: riboflavin was first discovered in 1917, and "flavus" is Latin for yellow.
What if you miss a day of your scoop?
Take your next scoop the following morning and carry on. The body can store only small amounts of riboflavin, and urinary excretion reflects dietary intake until tissues are saturated. The amount excreted strongly reflects recent intake. Consistency over intensity, and most of our customers feel the biggest benefits with consistency.
Always read the label and follow directions for use.
