#457: Austin Robinson, PhD – Salt Sensitive vs Salt Resistant, Impacts of Sodium on Health, & Racial Differences in Risk

Sigma Nutrition Radio

Danny Lennon

Sigma, Dietetics, Evidencebased, Nutrition, Training, Health & Fitness, Science, Diet, Fitness, Evidence, Bodybuilding, Health

4.8 • 626 Ratings

🗓️ 11 October 2022

⏱️ 70 minutes

🔗️ Recording | iTunes | RSS

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Summary

Hypertension (elevated blood pressure) is a condition that significantly increases the risk of several diseases and is a major cause of premature death worldwide. In the US, recent estimates suggest that about half of the adult population has hypertension.

At a population level, high sodium intake is one of the main dietary risk factors. All population health guidelines recommend keeping sodium intake below certain levels.

While, on average, blood pressure correlates with sodium intake, there is a wide range of responses on an individual level. People who see increasing sodium intake lead to increased blood pressure are termed “salt sensitive”. Others, however, don’t see much change in blood pressure with increased dietary sodium. Such individuals are classed as “salt resistant”.

In this episode, Assistant Professor at Auburn University, Dr. Austin Robinson, is on to discuss whether people who are salt resistant need to keep their sodium intake low or not. And other individual and group differences that exist for hypertension risk and sodium physiology?

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Transcript

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0:00.0	Hello and welcome to Sigma Nutrition Radio, the podcast where we have discussions about nutrition science.
0:20.9	Today we're at episode 457 of the podcast. I'm your host, Danny Lennon, and today we are
0:28.8	going to be diving into the topic of salt sensitivity, some of the impacts of
0:33.4	sodium on both blood pressure and beyond, and then both individual and group level
0:38.7	differences in risk profile and also response to sodium intake.
0:44.3	And to discuss these topics with me is assistant professor at Auburn University, Dr. Austin
0:50.3	Robinson, who is the director of the Neurovascular physiology laboratory there.
0:57.0	And his group's research largely focuses on the impact of both nutrition and physical activity
1:03.0	on various aspects of cardiovascular health and looking at different strategies that could be
1:09.0	used to prevent and treat cardiovascular disease.
1:11.9	And he's published specifically on some of the topics we're going to discuss today,
1:15.6	including salt sensitivity, as well as impacts of things like race and sex on the response to both sodium and then just cardiovascular disease risk more broadly.
1:26.6	So there's lots to dive through here.
1:29.9	And in fact, given the nature of this topic and I must say this conversation was one of my
1:36.3	favorite to have had on the podcast, I really enjoyed it and I also think it's a fascinating
1:40.3	topic.
1:41.3	But there's many aspects to it which are very useful to have a
1:44.9	additional bit of context placed on them and so for those of you who are premium
1:50.0	subscribers to the podcast the detailed study notes this episode are going to be
1:54.2	incredibly useful I think we've got about 16 pages of a PDF booklet for
1:58.6	this episode there's going to be some nice diagrams some explanations, and also some nice recaps of some of these main points.
2:06.6	And indeed, if you are listening on the free public feed and you are interested in being a premium subscriber, where you get things like these detailed study notes to our episodes, as well as things like the transcripts,
	...

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