Monday, April 25, 2016

New Chocolate Quality and Flavor in the Works

New Chocolate Quality and Flavor in the Works
by Kelly Sparks

Contrary to popular belief, chocolate bars are not made from a flowing, brown river. I’m looking at you for blame, Willy Wonka.




 Photo from Willy Wonka & the Chocolate Factory, Paramount Pictures

You won’t even find a chocolate tree, as they are just as rare as money trees. And the Easter bunny does not actually lay chocolate eggs. I know, this sounds terrible, but please keep reading, for what I am going to tell you is the very truth about how chocolate is made, along with some secrets about chocolate and how there may be a new kind of chocolate in the near future. Yes! A new kind of chocolate. Your eyes read that right. But, before I get there, we must start at the beginning.

The beginning:

While chocolate does not grow on trees, cocoa pods do. These cocoa pods are harvested and the pods and pulp inside the cocoa pod are taken out. This is the start to making the dark, delicious treat we know as chocolate.

The middle:

The pods and pulp are contained together and then the pulp starts a fermentation process that lasts about a week. This step is important because it is where the flavor of chocolate first starts to develop. Keep this in mind.

This leads us to the drying stage. From here, we have dried beans, which are then roasted. The beans are roasted at high temperatures for a period of time. This plays a role in the flavor of the chocolate bar. The dried beans contain cocoa butter, amino acids (which are the building blocks of proteins), sugars, and antioxidants; so when heated, they move around and collide with each other (just like you would do if you were being roasted), and this results in chocolate-like flavors.

The roasted cocoa beans have a thin, paper-like coating around them, so a process called winnowing is done to remove them, leaving just cocoa nibs.

The cocoa nibs are grounded to reduce particle size until they form cocoa liquor, which is made up of cocoa solids and cocoa butter. A conching process then takes place, during which the cocoa butter is evenly distributed throughout the chocolate while and sugar, and milk powder (for milk chocolate), and other flavorings are added. This process may take a few hours up until a few days, and affects the flavor of the chocolate. It is said that higher quality, better chocolate is conched longer.

The temperature of the chocolate is raised, lowered, and then raised again so that the chocolate has a smooth mouthfeel and so you can hear a snap when you break a piece off.

The end:

The chocolate is now what most of us consider chocolate, and it is now molded into any shape or design the chocolate manufacturer wants. Once the chocolate is cooled, it is wrapped and ready to be eaten by the customer (you)!

Fascinating. Oh yeah? The new kind of chocolate, don’t worry, I didn’t forget. This is the best part.

So, recall one of the middle processing steps of chocolate: fermentation. During this stage, naturally present yeasts and bacteria ferment the gooey pulp. Remember, this stage is when the flavors of chocolate first develop. Well, research conducted by The University of Leuven and the Flanders Institute for Biotechnology, along with the chocolate brand, Callebaut, show that using specific yeast strains can provide a better quality final chocolate product with new flavors and aromas. Lead researcher in this study, Dr. Jan Steensels, said “the set of new yeast variants that we generated makes it possible to create a whole range of boutique chocolates to match everyone’s favorite flavor, similar to wines, tea, and coffee”.


Similar to beer and wine, which also undergo fermentation, chocolate will be able to have a wider spectrum of flavors and aromas, ranging from a more fruity chocolate to a more sour chocolate. This means that we can match our favorite beer flavor with a complementary chocolate flavor. Or just have the new chocolate flavor by itself as a snack because it’s chocolate and doesn’t need to be paired with anything. The choice is yours. But for now, you can look forward to and dream about a new kind of chocolate.

Tuesday, November 24, 2015

Antibiotic stewardship: not a burden for animal agriculture alone

Antibiotic stewardship: not a burden for animal agriculture alone
By Bill Hsu
Incidence of antibiotic resistant bacterial infections are higher than ever, and the Centers for Disease Control and Prevention (CDC) note that at least 23,000 people die each year as a direct result of these infections.  It’s no wonder then, that fears of rampant superbugs are fueling the debate about responsible antibiotic usage, and much of the talk centers around antibiotics used in animal agriculture.  The same fungi spores that bore our first antibiotics find other use in the food industry though.  After all, it does take Penicillium to make blue cheese or Roquefort.  Much like some cheeses though, the debate surrounding is chock full of holes. 

California Senate Bill 27 (SB27) was signed October 2015 to combat what was described as widespread and unregulated use of antibiotics in animal agriculture at low or sub-therapeutic doses to increase weight gain in animals before they went off to slaughter.  SB27 expressly prohibits use of medically important antibiotics in animals unless they were prescribed by a veterinarian.  It also bans the use of antibiotics used for growth-promotion. 
SB27 references the Food and Drug Administration’s Guidance for Industry Document #152 (GFI 152).  These are rules the FDA proposed to classify different antibiotics important in human medicine into three categories: important, highly important, and critically important.  The list is extensive and includes highly specific-use antibiotics, as well as broader spectrum antibiotics that you might get from your doctor if you have a small infection.  This list, however comprehensive, is mostly meaningless in trying to limit antibiotic usage in California’s food producing animals.
Antibiotics generally have multiple indications on their label.  Macrolides and tetracycline are both classes of antibiotics that make an appearance on GFI 152.  These classes of antibiotics are also some of the most commonly used antibiotics in animal agriculture.  Based off those two facts alone, you’d suspect that using these two classes of antibiotics to promote weight gain is rampant in animal agriculture, but you’d be wrong.  You see, these antibiotics have several indications on their label. 
When a licensed veterinarian writes a prescription, or in this case, assigns a feed directive for a farm, he or she is prescribing the same antibiotics we mentioned were used to promote weight gain in animals—albeit, in higher concentrations.  You read that right—when you’re treating animals to prevent disease in areas of exposure risk, you’re using the more of the same antibiotics you were trying to limit use of!
But does it even matter?  The Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals from the FDA highlights that the two largest classes of antibiotics used domestically in agriculture are tetracycline (which you or I can buy today) and ionophores, which serve no function at all in the human body.  Together, these two account for about 3/4th of all antibiotics used in agriculture.  Our most valuable antibiotics, those classified as critically important in human medicine, including 3rd generation Cephalosporins and Flouroquinolones, see the heaviest usage in healthcare.  In fact, each of these account for less than 1% of usage in animal agriculture.  The fear of prolific superbugs spelling our demise is driving action like SB27, but the CDC  spells it out clearly—most deaths related to antibiotic resistance happen in healthcare settings such as hospital and nursing homes.
Antibiotic stewardship is a responsibility we all share.  With the discovery of penicillin, antibiotics have shaped what we know of modern medicine.  Antibiotics are powerful tools, but have a very finite practical life.  Investment in alternative practices in animal agriculture, including vaccines and animal management can help draw down total usage numbers.  Physicians dialing back antibiotic scripts, except in the most important cases can help prevent abuse of our most essential antibiotics.  Finish your antibiotics as prescribed.  Don’t flush extra pills down the drain.  A concerted effort to managing antibiotics, from all fronts, is necessary to address growing threats of resistance.
Attention spans are short and opinions are heard louder than ever.  Shifting the focus solely to agriculture while ignoring healthcare data, or making only symbolic attempts at bandaging the very real problem of overuse of antibiotics, especially of those critically important in human medicine, mean we will someday lose our best tools in healthcare.  Remember that for the future, whether it’s a doctor’s office you find yourself in or the meat and cheese display at your local deli.