I suspect this might fall outside of your inclusion criteria, but I’ve always wondered about the efficacy of dietary nitrate intake in solid forms of nutrition, such as the Beet-It Sport flapjack bars.
I’m aware of the whole nitrate-oral bacteria interaction, so I’d guess that the ergogenic effects of a given dose of nitrate would be lower in a solid *vs *liquid form and likely a higher degree of variability too. Is this something that you guys have studied?
We have not, as I am far more interested in mechanisms (if I had had my way, we would have skipped the beet juice and gone straight to nitrate salt in a gelatin capsule).
That said, this recent paper from Jones’s lab would seem to directly address your question:
Based on the ingredient list, each tablet could contain as much as ~6 mmol of nitrate. However, I measured some one time, and did not find nearly that much (but am also not sure that I trust the data, as I had a hard time getting the tablet to fully dissolve).
A company called Theravasc has been developing time-released sodium nitrIte capsules, but I don’t know whether they are on the market yet.
I know the researcher in the physics department at Wake Forest who has been researching beet root juice for a while know. I use to give them blood for the research and they would give me some free beet juice when I was done. I never used it for sport but would chug it and go do work coding and doing simulations.
Up to 19 different products now, but still seeking one more to make an even 20. Looking in particular for another single serving, non-concentrated beet juice drink to test. Have already tested Beet Performer (two flavors), Beet-Power, and Beet Fizz. Any suggestions?
We have generally been steering away from beet powders sold in bulk, though, as there are a zillion of them on the market and the dose is a bit hard to define.
(I did make an exception recently for PureClean Performance, since it is marketed directly at athletes and they recommend a specific amount and time to ingest it.)
Any other single serving drinks out there? I tried to lay my hands on some Beetology, but the local health food store that is listed as a retailer did not have any in stock.
Up to 19 different products now, but still seeking one more to make an even 20. Looking in particular for another single serving, non-concentrated beet juice drink to test. Have already tested Beet Performer (two flavors), Beet-Power, and Beet Fizz. Any suggestions?
Last call! Need some time to order and test any additional product(s) before presenting the data at ACSM in late May/early June.
Interesting. Is there any concensus on what the appropriate serving/dose should be?
I’m curious about this as well. I currently take 2 Beet-It Sport shots between 1.5 to 2 hours before a race.
I also don’t supplement Beet juice during a race, but would this be beneficial for longer races like an Olympic distance or 70.3?
IIRC, general consensus is roughly 500ml/day leading up to and including race day for about 7 days. This is to maximize benefits and minimize intestinal distress.
This is the one I use. It is not marketed toward athletes really. I shop here as it is an Arizona based company and they have great customer service, and BOGO’s often.
I wouldn’t really say that there is a concensus, but data from several studies points to 6-12 mmol being the optimal dose, at least in healthy young individuals (we are presently conducting dose-response studies in heart failure patients and in healthy elderly individuals, as they may require more).
As for chronic vs. acute dosing, there really isn’t much evidence in humans for anything beyond an acute effect (as I had to educate a reviewer about recently).