Jun 18, 2026 · 34 min · 12 segments
What does it actually take to diagnose REDs, and what happens after? If you've ever wondered what's going on behind the scenes when a sports medicine physician suspects REDs, this episode is your…
Rosa PasculliGuestHeather CaplanHostSo then what does the diagnostic mean? process look like for reds from the medical perspective and i you know i can't really diagnose somebody with reds that's not my job i can say low energy availability is what we're dealing with here but what does the diagnostic process actually look like yeah

For me, I actually rely very heavily on my dietician colleagues when I'm seeing an athlete to kind of give me that feedback.

Like, hey, yeah, we do think this athlete has been like pretty chronically under fueled.

you have low energy availability plus this physiologic or psychological change that's happening.

You know, it's because of this chronic sustained problematic low energy availability.

And so from a diagnostic standpoint, then we need to start investigating what do their labs look like? So we may get a CBC and say they have a low white blood cell count or we're doing their vital signs and they may be bradycardic.

We're asking about their hormone status in terms of if it's someone not on birth control, do you get a period? And what does that look like? And so it's really taking all of these signs and symptoms and putting them together to say, yes, this athlete has REDS.

It's challenging because that's part of the workup we do is if an athlete has secondary amenorrhea, I can't just out and say, this is REDS.

Like we really have to dig deep and look out for all of these other things before we start saying that someone has has reds because then you can miss other diagnoses.
So the first thing I ask folks who start working with me as a dietitian who are like, I have HA.
So then what does the diagnostic mean? process look like for reds from the medical perspective and i you know i can't really diagnose somebody with reds that's not my job i can say low energy availability is what we're dealing with here but what does the diagnostic process actually look like yeah

For me, I actually rely very heavily on my dietician colleagues when I'm seeing an athlete to kind of give me that feedback.

Like, hey, yeah, we do think this athlete has been like pretty chronically under fueled.

you have low energy availability plus this physiologic or psychological change that's happening.

You know, it's because of this chronic sustained problematic low energy availability.

And so from a diagnostic standpoint, then we need to start investigating what do their labs look like? So we may get a CBC and say they have a low white blood cell count or we're doing their vital signs and they may be bradycardic.

We're asking about their hormone status in terms of if it's someone not on birth control, do you get a period? And what does that look like? And so it's really taking all of these signs and symptoms and putting them together to say, yes, this athlete has REDS.

It's challenging because that's part of the workup we do is if an athlete has secondary amenorrhea, I can't just out and say, this is REDS.

Like we really have to dig deep and look out for all of these other things before we start saying that someone has has reds because then you can miss other diagnoses.
So the first thing I ask folks who start working with me as a dietitian who are like, I have HA.
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