Key Takeaways
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Reb M is a steviol glycoside found naturally in the stevia plant that delivers a cleaner, more sugar-like sweetness without the bitter aftertaste associated with traditional stevia.
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It's recognized as safe by the FDA, contains zero calories, has no effect on blood sugar, and is considered safe during pregnancy and breastfeeding.
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More brands are switching to Reb M as a way to improve taste while keeping ingredient labels clean, natural, and free of artificial sweeteners.
If you've ever tried a stevia-sweetened product and noticed a bitter aftertaste, that's usually from Reb A (Rebaudioside A), the most common stevia compound. It's affordable, but the taste has always been a compromise.
At Perelel , we recently switched to Reb M in our sweetened products. Here's what it is and why it matters.
What Is Reb M?
Reb M (Rebaudioside M) is a steviol glycoside found naturally in the leaves of the stevia plant . It's zero-calorie, doesn't affect blood sugar, and delivers a smooth, rounded sweetness that closely resembles sugar without the bitterness or licorice-like finish Reb A is known for. It's 200 to 350 times sweeter than table sugar, so a tiny amount goes a long way.
How Is It Different from Regular Stevia?
Stevia is the plant. Reb A and Reb M are both compounds within it, but they taste different:
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Reb A hits sharply, often with a bitter or licorice-like aftertaste that lingers
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Reb M builds more gradually with a rounder, sugar-like sweetness and a finish that doesn't overstay its welcome
Both are natural, zero-calorie, and plant-derived. The difference is the experience.
Is It Safe?
Yes. A few key things to know:
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FDA recognized as GRAS (Generally Recognized as Safe)
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Also approved by the European Food Safety Authority
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Doesn't accumulate in the body
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Generally considered safe during pregnancy and breastfeeding
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Zero calories, zero glycemic impact
How Is Reb M Made?
Reb M exists naturally in stevia leaves but only in small amounts. Newer production methods have made it more accessible:
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Leaf extraction from stevia varieties bred to contain more Reb M
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Enzymatic bioconversion that converts stevia leaf extract into Reb M
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Fermentation using microorganisms, similar to how yogurt or bread is made
All three produce the same molecule found in nature.
Why Perelel Made the Switch
At Perelel, we want our daily powders to taste as good as they perform. If your hydration powder or protein doesn't taste great, it doesn't get used consistently, and consistency is how nutrition actually works.
Reb M lets us keep our formulas free of added sugar and artificial sweeteners while delivering a sweetness people genuinely enjoy. It's natural, well-studied, and safe at every stage.
Frequently Asked Questions
Does Reb M have calories or affect blood sugar?
No to both. It's a zero-calorie sweetener with no glycemic impact.
Is Reb M safe during pregnancy?
Purified steviol glycosides, including Reb M, are generally considered safe during pregnancy and breastfeeding at typical food-use levels.
Is Reb M artificial?
No. It's a naturally occurring compound from the stevia plant, whether extracted directly from the leaf or produced through bioconversion or fermentation.
Sources:
Development of Next Generation Stevia Sweetener: Rebaudioside M | PMC
A Review on Rebaudioside M: The Next Generation Steviol Glycoside | Journal of Food Science
Stevia: Side Effects, Who Should Avoid It, and Use During Pregnancy | Medical News Today
