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Dietary Reference Intake

Dietary Reference Intake

Search complete. 68 mentions across 24 episodes found for "Dietary Reference Intake".

Oct 29, 2026

Reza JazayeriGUEST
45:13
So everyone talks about protein.
Reza JazayeriGUEST
45:15
So first of all, thanks for bringing up the amount of protein, because the reality is if you look at the FDA and the RDA, the recommended daily allowance for protein, like where that number come from, that the RDA was based on healthy young men around their twenties.
Reza JazayeriGUEST
45:31
What is the minimum amount of protein they should consume in order to avoid being malnourished.
Reza JazayeriGUEST
45:39
That number, which is 0.8, very different than you who's going to have surgery and recovering from an ACL reconstruction or my mom who's having a total hip replacement or someone has a trauma, right? Again, going back to understanding that because surgery is this hypermetabolic, you're really bringing a lot more tissue, that number is not gonna be able to be sufficient.
Izabella WentzGUEST
13:57
That was also my observation in people who would maybe get like brain fog from carbohydrates or a lot of blood sugar swings, taking some thiamine could actually reverse that.
Izabella WentzGUEST
14:07
And it's very interesting because there is a therapeutic dose of thiamine that I will use that's way beyond the RDA.
Izabella WentzGUEST
14:15
So the RDA might be like milligrams where we're using mega doses of thiamine.
Izabella WentzGUEST
14:20
There are a few different types of thiamine.
Izabella WentzGUEST
14:23
There's straight up thiamine, there's injectable thiamine, there's silbutiamine, which tends to be more brain active.
Autumn SmithHOST
15:04
And what are the best dietary sources? I know pork is one of them.
Autumn SmithHOST
15:08
The tricky thing, again, it's like the
Izabella WentzGUEST
15:09
RDA of thiamine and what you would get from foods is going to be like 1.2 milligrams per day, right? For men.
Sten EkbergHOST
9:15
And that is what we today consider a sufficiency.
Sten EkbergHOST
9:19
but we're not really only interested in sufficiency we want to look at what might be optimal because during times of stress and during times of infection your body requires more so let's just kind of double it and say that optimal is probably somewhere between 150 to 200 especially when your body has an increased need But when they make those recommendations of vitamin C, the RDA, the recommended daily allowance, and they say it should be 75 to 90 milligrams, what is it that they're recommending? It's 90 milligrams of what? is it the vitamin C or is it ascorbic acid and I know that you did your research you looked it up and the dictionary says they're the same thing well we're going to take it a little bit further and we're going to show you that they're not the same thing and this is a huge part of the problem and the confusion vitamin c does have ascorbic acid but it is not just ascorbic acid vitamin c is a complex it's a functional unit and it consists of several different components it has something called ascorbigen and bioflavonoid complexes and they have multiple coordinating roles in the overall function and coordination of the vitamin c complex Then we have something called tyrosinase which is an enzyme and this is a form of organic copper.
Sten EkbergHOST
10:59
It has a role of trace mineral activator and it is the thing that actually stimulates and makes the white blood cells get going.
Sten EkbergHOST
11:09
So that is the immune system portion of this.
Monica ReinagelHOST
3:03
But how much choline is enough? Turns out to be a good question.
Monica ReinagelHOST
3:08
Choline does not have a recommended dietary allowance, an RDA, because the panel of experts that establishes those recommendations feels that there's not enough data to determine what amount is sufficient.
Monica ReinagelHOST
3:23
And when there's not enough information to set an RDA, the National Academy of Medicine kind of punts by setting an adequate intake instead.
Monica ReinagelHOST
3:32
And this is usually based on the amount that healthy people seem to be getting.
Monica ReinagelHOST
3:37
And the assumption there is that if they're generally healthy, well, then they must be getting enough.
Monica ReinagelHOST
5:58
Now, for now, it's up to women and their doctors to make sure that this need is being met.
Monica ReinagelHOST
6:04
The American College of Obstetricians and Gynecologists recommends that women who are pregnant or trying to get pregnant aim for 450 milligrams a day, including what they get from their diet.
Monica ReinagelHOST
6:17
Given its importance, I'm eager for researchers to produce enough evidence to allow us to set actual RDAs for choline in those different life stages.
Lisa SmithHOST
35:49
Although remember, that one has to go through the extra step just to become NR.
Lisa SmithHOST
35:55
So how do you actually put this all together? How would you even know how much to take? Well, the RDA for vitamin B3 is 16 milligrams.
Lisa SmithHOST
36:04
Now, that number, as all the RDAs, was based on the minimum needed to prevent full-blown disease, in this case, pellagra, not the threshold you need to optimize cellular function and NAD levels.
Lisa SmithHOST
36:19
It is the floor.
Lisa SmithHOST
36:20
It's not the ceiling.
Lisa SmithHOST
36:21
So when you see RDA levels, keep that in mind.
Lisa SmithHOST
36:23
Those are the floor.
Lisa SmithHOST
36:24
They're never the ceiling.
Esther BlumGUEST
38:07
And so you raise a really good point, Cynthia, which is the other thing I want to say is most women I see are eating between 900 and 1250 calories a day.
Esther BlumGUEST
38:17
That is, it's hard to even meet your RDA and the RDAs are low for nutrients.
Esther BlumGUEST
38:23
It's hard to even meet your RDAs on 1250.
Esther BlumGUEST
38:27
And so what we do is we diet them up.
Esther BlumGUEST
38:30
And I see we, I have a strength coach who is part of my practice and a nutrition coach as well.
Gabrielle LyonHOST
5:46
And that's IAAO technique to identify the point where additional dietary protein stopped producing further improvements in amino acid utilization.
Gabrielle LyonHOST
5:56
The estimated average requirement came out to be around 1.3 grams per kg per day, with the RDA like estimate being 1.5 grams per kg.
Gabrielle LyonHOST
6:10
That's substantially above the current 0.95 grams per kg recommended for that age group.
Gabrielle LyonHOST
6:17
To be fair, this was a small study involving only seven children, and as you can imagine, children are very difficult to test.
Gabrielle LyonHOST
6:25
But get this, the current RDA includes data from only two studies involving eight boys.
Gabrielle LyonHOST
6:31
The DRI, which is the dietary reference intake, explicitly says that the indicator amino acid oxidation technique is superior to nitrogen balance and should be relied upon when available.
Gabrielle LyonHOST
6:44
So when I said that our recommendations are not settled science, this is what I'm talking about.
Brenda DavisGUEST
13:56
And essentially, we need a stronger protein stimulus to achieve the same amount of muscle building.
Brenda DavisGUEST
14:06
And so the RDA for protein is 0.8 grams of protein per kilogram of body weight.
Brenda DavisGUEST
14:12
Of course, a kilogram is 2.2 pounds.
Brenda DavisGUEST
14:16
And what a lot of people don't realize is in North America, in the United States and Canada, we don't have a separate RDA for seniors, but they do in a lot of countries.
Brenda DavisGUEST
14:31
Australia, all the Nordic countries, several European countries have higher recommended intakes for seniors.
Brenda DavisGUEST
14:39
And most of the expert consensus groups recommend one to 1.2 grams of protein per kilogram for seniors with higher amounts needed for those with chronic diseases or illnesses.

21 MINS LATER

Brenda DavisGUEST
35:52
We want to meet our recommended intakes or maybe slightly more.
Brenda DavisGUEST
35:56
We want to maintain a healthy vitamin D level.
Rhian StephensonGUEST
16:08
So as you said, fiber is a buzzword for good reason.
Rhian StephensonGUEST
16:13
We know now that it is so important to get enough and 96% of us are not getting the RDA, which is 30 grams a day.
Rhian StephensonGUEST
16:21
96% and
Liz EarleHOST
16:23
that RDA is not high.
Liz EarleHOST
16:25
It's not
Rhian StephensonGUEST
16:25
optimal.
Liz EarleHOST
20:47
food, but right
Rhian StephensonGUEST
20:47
now we aren't.
Annie FennHOST
27:12
A paper last year I thought was really, really important when it comes to long-term brain health.
Annie FennHOST
27:16
They looked at the RDA, which is the recommended daily allowance of magnesium, and found that most people probably need more than 350 milligrams a day, that they were finding more cases of reduced brain volume with age if they're under 550 milligrams a day.
Annie FennHOST
27:34
And this was especially true in women.
Annie FennHOST
27:36
So we may need to rethink the RDA.
Annie FennHOST
27:38
We may need to be getting more magnesium than we think we're getting.
Annie FennHOST
27:42
And I think that magnesium can definitely improve sleep if a brain-specific type of magnesium is used, like a magnesium glycinate.

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