BulkSupplements.com Riboflavin Powder - as Vitamin B2, Vitamin B2 Supplement - Riboflavin 400mg, B Vitamins for Wellness, Gluten Free, 400mg per Serving, 500g (1.1 lbs) (Pack of 1)

I try to get as many of my supplements from this company as I can. They are always good quality, competitively priced, and seem to be adding new products all the time. After ordering another product I was offered the opportunity to receive a product of my choice in exchange for my honest review. I greatly appreciate this as well as I get the opportunity to try something new with the risk of feeling it was money down the drain if it's no good, or just no good for me. Truthfully I never really fear this with this company, I've been using their products for years and will continue to do so. It's difficult to say whether this specific product is doing a whole lot as it was prescribed by my neurologist at a dosage of 400mg daily as part of a migraine reduction regimen. What I can say is most B vits nearly gag me they smell so bad just opening the bottle, and it takes a LOT to kick this in for me. I was a little worried about getting powdered B's fearing it would ruin my AM cocktail but this one is practically odorless and changed nothing about the taste of my drink so I'm pretty happy :)

Works for me and mild common headaches sometimes combine with coq10 sometimes not as that's more expensive and slightly stimulating. Very good bulk deal. I wish bag sealed more tightly though be very cautious about that as the stains are similar to turmeric stains, but not sure if they are easier to get out I wouldn't risk it. Not a strong taste maybe slightly bitter.

It can be added to frosting or drinks in small amounts for interesting effect during a black-light party! But my use was VERY different.... I had a leak in my home well water pump system that I needed to trace. ALL commercial water tracing products had ingestion warnings / not fit for human consumption. Fortunately, riboflavin strongly fluoresces under UV light, is consumable even in large doses, and water soluble. That last part is most important, because not only will it easily mix in my water system, any amount ingested that the body cannot use will be easily expelled! I added about 1/2 the package to my water system, waited till nightfall, then easily found the source of my leak & the 2x increased electricity bill that let me know something was wrong... Although the main leak could be seen during daytime (as seen in attached photo), there were 2 smaller leaks that I wasn't able to see till night time & would never have found without the intense UV glow of the riboflavin. ONLY downside, riboflavin is VERY bitter. Also I had to let it go into my water heater because I didn't know if it was hot or cold line that was leaking.... It's already completely flushed out of the cold water lines, but still tints the hot water.

I have complained before when buying items from Bulk Supplements on Amazon, that the expiration dates on the items indicate that rather than return old merchandise to the manufacturer, Amazon is eliminating old merchandise by sending them out to unsuspecting customers. Management of Bulk Supplements has informed me that it is not their fault, and that Amazon is failing to check the expiration dates before sending out Bulk Supplements merchandise to customers. Check the expiration dates when you receive them. Older Bulk Supplements products not only loose potency, but may cause stomach discomfort and more serious problems!

I'm sure this is a quality product, but on the bulk B2 powder I received, there was no teaspoon measurement. There is a teaspoon measurement shown in their product description so I feel like this is a little deceptive. I called BulkSupplements and they couldn't give me a teaspoon measurement as they said this is sourced somewhere else and the potency will vary. You have to weigh it as noted on the bag it comes in (which varies??). This didn't work for me. Just as heads up as you won't be able to return these products...at least that was what Amazon told me.

Riboflavin is important to the metabolism in several ways, including - Conversion of vitamin B6 to P5P - Conversion of the amino acid tryptophan to niacin (vitamin B3) - Folate production - Regulation of homocysteine levels - Metabolism of fats, hormones, and drugs - Energy production and growth Riboflavin is degraded by sunlight, and UV light. This applies to stored riboflavin whether in bulk, in milk, or even in your body. Like sun exposure, greater physical activity, also increases the body's need for riboflavin. A deficiency can easily go unnoticed as riboflavin levels are not routinely tested. Meat and dairy products are the primary sources of dietary riboflavin. Even vegans who eat an otherwise nutritious diet are at often at risk of riboflavin deficiency. (Oats are the best non-animal natural source.) Riboflavin is recommended for preventing migraine headaches in both adults and children. Increasing riboflavin intake reduces the risk of lung cancer in smokers. Riboflavin's coenzyme activity is theorized likely to help prevent may other types of cancer. Riboflavin is a cofactor for the MTHFR enzyme so individuals with a SNP that reduces the efficiency of the enzyme should take care to avoid any deficiency. Riboflavin may help prevent the development of cataracts. Riboflavin has no known toxic level. it has no adverse side effects from high short-term or long-term supplementation. Finally, riboflavin has no known clinically important interactions with medications. In short, Riboflavin is extremely safe. Like all B vitamins, riboflavin is water soluble.

Very happy with purchase

Product is great. Pouch it comes in, not so much. Upon opening the pouch, I noticed that the resealable section was full of B2. I scraped as much out as I could and thought I had closed and sealed it properly. I triple checked. It had not sealed properly and I ended up sitting on a yellow bed looking like a 6 foot oompa loompa. This seems to be a consistent issue of their pouches as I have had this happen with a couple of other purchases of theirs. Really frustrating as a lot of their products come in such portion sizes that they can be used for years, but are also highly sensitive to the elements so aren't much use if the pouch isn't sealing properly. Would recommend adding a desiccant sachet and checking the correct RDI as the company has a habit of suggesting much higher amounts than the average RDI.