Stevia: Sweet Little Miracle Leaf from Paraguay –

Stevia: Sweet Little Miracle Leaf from Paraguay

6 mins

Stevia --  it's just a calorie-free sweetener! But its mitigating effects on glucose homeostasis, inflammation and blood pressure — markers of a public health crisis called obesity— have diabetes researchers grinning like kids in a candy store.

Table of Contents

Stevia. Everyone is talking about it — well …  a fair number of people, anyway. What the hell is it?

Stevia is an incredibly potent, zero-calorie natural sweetener made from the leaf of the Stevia Rebaudiana plant; a South America herbaceous shrub that, it must be said, is not much to look at. But what stevia lacks in Aesthetic Wow© it more than makes up for in its controlled explosion of calorie-free natural sweetness.

Oh, and stevia’s mitigating effects on glucose homeostasis, inflammation and blood pressure -- markers of a public health crisis called obesity? Diabetes researchers are grinning like kids in a candy store as they continue to avidly explore—and contribute to—stevia's domination of yet another sugar; blood sugar. Yeah -- this is another of Mother Nature's funky little party favors; a leaf that is changing the world.

Stevioside and Rebaudioside Ask Table Sugar To Step Aside

Stevia’s two main compounds are Stevioside and Rebaudioside — non-nutritive glycocides 200 - 400 times sweeter than table sugar. That is, a little Stevia goes a very long way: making it notably efficient to produce in this era of conscious resource-stretching. And if you shout its name in a crowded space, people named Steve will turn their heads. How many other sweeteners can make that claim? Another value-added.

Stevia’s Discovery: A Besotted Swiss Chemist in Paraguay 

Like much of the plant kingdom western science is only now excitedly beginning to explore, stevia had been in use as a medicinal herb for thousands of years—principally in Paraguay and Brazil—when stevia and western science politely collided in 1901. 

That year, the Director of the College of Agronomy in Ascuncion, Paraguay received a gift of Stevia from some indigenous friends.

Like any over-eager Director of a College of Agronomy, Swiss emigre Dr. Moises Bertoni graciously accepted the gift, politely bade his guests farewell, then sprinted to his lab to begin feverishly digging into Stevia's secrets. What Dr. Bertoni found in stevia's chemistry began a parade of discovery that is still running full tilt today. This nondescript little leaf is packed with surprises.

When at last the good doctor dazedly emerged from his lab—wearing a broad grin and rumpled chemist's smock (we may freely imagine)—he decided to name the plant after his pal, chemist Dr. Ovid Rebaudi. Stevia's formal name? Stevia Rebaudiana.

An Ecstatic Naturalist in Paraguay!

Bertoni—a trained biochemist, natural scientist, and future icon of environmentalism—had emigrated to Buenos Aires, Argentina from his native Switzerland in 1884; his wife, their five kids, his mother, and about 40 Swiss farmers in tow.

A couple years earlier, he'd written to his wife of their common dissatisfaction with polite Swiss society, and their dream of leaving Europe. "Yes, my dear Eugenia; we shall depart. We shall despise this society that mocks our humanitarian beliefs. You know how I want to live my dreams of travel and exploration!"

These desires did not remain dreams for long. Moving to South America was a big deal for Bertoni. For this eager biochemist and nature-lover, in 1884 South America was Life Sciences ground zero with its jungles, mountains, micro-climes, and continual sun-drenched discovery of theretofore unknown plant and animal species.  

Iguaçu Falls, Misiones Province, Argentina. Photo © Enaldo Valadares

On the group's arrival, the Argentine government gave Bertoni and his gang permission to establish a homestead on the banks of the Paraná River in the wildly gorgeous Misiones province of Argentina. Bertoni, his family, and the Swiss farmers established a little colony there, where Bertoni began his studies of agriculture, zoology, botany, and anthropology—while the commercial crops grown on the 5-square-mile property supported Bertoni's research.

                                             Moises Bertoni -- a sublimely happy man with a sun-splashed plan

One day, Bertoni inadvertently wandered across the border into Paraguay, and the die was cast. Bertoni was so smitten he established his homestead there in Paraguay, receiving from that government a 12,500-hectare land grant. Bertoni named his new home and research center Colonia Guilllermo Tell, after Swiss national hero and anti-royalist *William Tell.

Colonia Guillermo Tell -- photo by Oliver Marshall

(*It's worth remembering that William Tell is also legendary for having shot an apple off the head of his young son - a dangerous feat ordered by the king's representative in the region, Albrecht Gessler, when Tell failed to bow to Gessler's new hat. In the event, Tell took out two arrows, successfully splitting the apple atop his sons head from 120 paces. He'd told a compatriot the second arrow was for Gessler in the event Tell failed...) 

                         photo by Oliver Marshall

Colonia Guilllermo Tell still stands today as a much-visited stop for eco-tourists in Paraguay.

Stevia and the World-Sweetening Revolution

By 1921 word reached the USDA about Stevia’s sweetening capabilities. With predictable sure-footedness, the business world sprang into action, throwing down a number of plantations to grow the entrepreneurially attractive shrub. When sugar rationing during WWII introduced Stevia to the beleaguered UK as a new sweetener for their tea—it was a rare bit of relief during a harrowing period for the embattled island nation. Still, stevia remained a little-known nutritional phenomenon. 

Then in 1971, Morita Kaichi and his company Morita Kagaku Kogyo launched stevia sweeteners as an industry in Japan, personally pioneering both the extraction process and stevia’s rollout as a global sugar substitute. Since then, a cohort of twentieth century scientists, politicians, and investors have secured stevia’s reputation in the global marketplace. Sugar is looking over its shoulder with concern, and has been for awhile. 

Stevia is a Caloric Black Hole

It’s all true—stevia contains 0 calories and has a big fat 0 as its glycemic index, too. In a double-blind, placebo-controlled trial, Stevia was also shown to have a blood-pressure lowering character, and an effect on insulin that would be of help to type 2 diabetes patients.

Stevia’s aforementioned contribution glucose homeostasis, the balance of insulin and glucagon that maintains blood glucose, puts the sweetener right in the eye of the hopeful storm of dynamic diabetes research. Stevia may well prove to be an effective intervention for those cardiovascular risk factors associated with obesity. 

Because stevia is not metabolized in the body, it is in the non-nutritive (calorie free) sweetener category, and as of 2008 has been given GRAS (Generally Recognized as safe) status by the FDA.

Stevia and Insulin Sensitivity

Guess what? For those of you losing sleep over this super-sweetener’s effect on insulin … stevia is actually linked to increased insulin sensitivity, meaning Stevia allows the cells of the body to use blood glucose more effectively, reducing blood sugar.  Stevia may thus ultimately be helpful in management of type 2 diabetes. 

There’s more, if you can imagine. Yes, we’re still talking about a sweet Paraguayan leaf here. Stevia not only produces a low glycemic response, this sweet little leaf is even packed with essentials like vitamins A, B3, and C. Minerals? Okay, we can go there. How’s about magnesium, potassium, selenium and zinc? Cool? 

Lastly, stevia has antimicrobial and antioxidant properties. Yes, satisfy your sweet tooth with a mouthful of nutrients, germ fighters and cellular bodyguards. Too good to be true? Nope.

Stevia is Fabulously Sustainable. More Bad News for Sugar. 

Not only is stevia a swaggering, sugar-bullying sweetener straight outta Nutritionist Dreamsville (not a real place), stevia has proven itself a crazily sustainable crop, too. 

Stevia’s land, water, and energy requirements make it a 21st century resource-preserving superstar. Using "sweetness equivalence” to compare crops, researchers found an 82% reduction in carbon footprint for stevia compared with beet sugar and a 64% reduction compared with cane sugar. What else?! The water footprint for stevia was 92% lower than beet sugar and 95% lower than cane sugar.

Stevia: A Rose by Any Other Name Would Smell as Sweet

No, Big Bill Shakespeare did not mention stevia in his West Side Story prequel, that finger-snappin’ Elizabethan teen tragedy Romeo and Juliet. The point of Big Bill’s R & J quote over this section? A little Shakespeare in an article about nutrition can only make the world a better place. Also — sweet is as sweet does. 

That is, stevia might as well be sugar for all the sweet pleasure it provides, and with none of sugar’s baggage. At ~ 300 times the sweetness of sugar, it takes very little stevia to rock your sweetness boat. Not sure where I came up with “sweetness boat”, but please go with it.
Something like stevia is almost inevitable in a world whose plant life— even amid indicators of a growing imbalance— continues to surprise us with scientifically verifiable wonder. What else might our dear and steadfast Plant Kingdom have up its sleeve? Yes, a kingdom with sleeves. *sigh* Again, please go with it.

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