On Instagram, RD Working For Welch implies that Welch's grape juice won't raise blood sugar (by @DylanMacKayPhD)


Today's guest post comes from Dylan MacKay. Dylan is a nutritional biochemist who has type 1 diabetes and when I saw RD Marie Spano's Instagram post, I knew she would have personal and professional thoughts to share, so I invited her to do it.

I don't know what it is about grapes, but it always seems to be my raisin ire …

I mean a person with type 1 diabetes, a PhD in Human Nutrition Science and researching diabetes and occasional clinical trials examining the glucose response, maybe I'm not the one to talk about this, but I can't.

Recently a Welch Grape Juice (* cough *) "nutrition consultant"posted the above nutrition translation travesty on Instagram.

This really surprised me because when I have low blood sugar levels, I often drink grape juice. How am I still alive? I mean I can honestly say that sometimes grape juice may have saved my life (from increase the blood sugar in my blood). However, you could possibly consider this Instagram post and think about it quite a bit

"Consuming 100% Juice From Polyphenol-rich Fruit Juices Does Not Increase Your Blood Sugar"

unlike obviously that bad candy or pop that raises your blood sugar.

That would of course be 100% wrong.

Polyphenols are not magical sugar blockers, otherwise we would use them to treat diabetes and you would have severe gastrointestinal upset by eating berries and grapes. I feel like it doesn't even have to be RD to see that this message is bad (Seriously, Welch consultants, how much do you pay for your credibility?). Especially on a social media platform where one may not scroll to the end of the comment and look at "report"provided.

Speaking of the report used for this knowledge translation crime, this is a review article called The Impact of Dietary Polyphenols on Carbohydrate Metabolism and after looking at it, I can say that it does not support the claim in this post. Most of the articles talk about animal or cell culture results indicating that polyphenols may affect digestion or absorption of glucose, but there is nothing in the article that indicates that it stops. It even comes to that conclusion

"Human trials with well-defined diets, controlled trial studies and clinically relevant endpoints are needed to confirm the effects of polyphenol consumption for the prevention of insulin resistance, metabolic syndrome and ultimately type 2 diabetes."

The closest thing to the article that supports the Instagram post is

"The shape of the plasma glucose curve with decreased concentrations in the initial phase and slightly increased concentration in the later phase indicates a delayed response due to consumption of berries"

for a study done with 12 healthy participants looking at berry (rich in polyphenols). Polyphenols (or something else in the berries) changed when blood sugar was raised.

I guess Welch's nutrition consultant can tell

"well actually Dylan, changing the shape of blood sugar elevation means that it doesn't really raise blood sugar like candy"

and we could get a long argument about how you define "like"When people disagree on the details or the semantics, the big food companies have won.

This type of nutrition misinformation ad works because it is ultimately designed to destroy people's trust in nutrition science and nutrition experts (especially RDs). If consumers are confused and can't trust anything in the diet, they are ripe for the next trend or mania or advertising. This is good for business, but bad for people.

If you like grape juice, drink it, sometimes I do it when I have low blood sugar levels (I've hit maple syrup for that too …), but you know that grape juice will increase your sugar in the blood and thermal calories, 9 teaspoons of sugar per glass of grape juice is an easy way to surpass energy consumption. Most of us try to avoid excessive energy intake, so in my opinion you can't beat the water.

Dylan MacKay PhD is a Nutritional Biochemist and Assistant Professor at the University of Manitoba in Winnipeg. She is also a clinical tester at the George and Faye Yane Center for Health Innovation. Dylan is of particular interest in clinical trials in people related to lifestyle and diabetes. It is originally from St. John & # 39; s, Newfoundland where he began his postgraduate studies at Memorial University.

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