(NaturalNews) Food activist Vani Hari of foodbabe.com recently petitioned the largest beer brewers in America, MillerCoors and Anheuser-Busch, asking the companies to disclose their full list of ingredients - including controversial additives that are often kept off of labels.

"They tell you the basic ingredients, but not the additives" said Vani in an interview with ABC News.

Growing number of consumers want to know what they are eating, drinking, and supporting

Vani, her husband, and a growing number of consumers want to know what they are actually eating and drinking - and that includes the hidden ingredients in beer.

Consumers have a right to know what's in their food and drink, whether it contains high-fructose corn syrup, stabilizers, or artificial flavorings, which have been linked in some way to obesity, allergies, hyperactivity and gastrointestinal problems.

It's also important to know whether a product contains controversial biotech additives like genetically modified ingredients. Consumers should know whether they are supporting genetic alterations of life when they buy a food product or even when they drink a beer.

"I just want full disclosure," Vani said, "not to change labels and go through government labels -- just to disclose it online so everyone can see." Vani also pointed out that some beer is made with fish bladders, or may contain antifreeze chemicals like propylene glycol.

Within 24 hours of the petition's launch, Anheuser-Busch and MillerCoors responded, reassuring the public that they are in full compliance with all federal and state labeling requirements. Strangely, MillerCoors released conflicting ingredients lists. View the documents here:

MillerCoors confuses consumers with conflicting ingredient lists

Apparently there was a mix up at MillerCoors; in an email sent to Vani, the company listed corn syrup as an ingredient. In a public disclosure, representatives failed to list corn syrup and instead listed a very different ingredient - corn. Even more, the type of corn used by the big brewer is suspected to be a genetically modified variety, derived from the biotech industry.

To turn up the heat on America's largest beer brewers, and for full public disclosure of their ingredients and secret additives, please sign the Food Babe's petition here.

Your beer might be brewed with fish bladders

During beer and wine manufacturing, brewers often use a little known gelatin-like substance called isinglass. The isinglass is made from the air bladders of fish and is used to speed up the filtration and settling process of solid particles and yeast cells during brewing. When the process is complete, a resulting jelly-like mass is easily removed from the bottom of the cask. The practice is generally considered natural and safe but it may be something vegetarians would like to know - that fish bladder could be in their beer.

Your beer may contain antifreeze chemical - propylene glycol

Cancer patients looking to survive would benefit from knowing if products like beer contain propylene glycol. As a humectant, solvent, and preservative, propylene glycol is a versatile additive for numerous products including things like antifreeze, de-icing fluids, brake fluids, and polyester resins. Interestingly, propylene glycol is also used in many beers.

Where does propylene glycol come from? Let's follow the process. Propylene glycol comes from the hydrolysis of propylene oxide. Propylene oxide is formed through the hydro-chlorination (oxidation) of propylene. Where does the propylene come from? It is produced as a byproduct from petroleum and natural gas fossil fuels.

Basically, propylene glycol starts as an oil byproduct; from there it undergoes extensive processing to ultimately be considered a safe additive for antifreeze and an edible ingredient in beer.

Why is this additive potentially dangerous to humans? The human body metabolizes propylene glycol primarily into lactic acid. This creates a state of acidosis in the human body, causing cellular edema. Propylene glycol is really just contributing to the cancer epidemic, establishing a cellular environment that welcomes cancer.

Sources for this article include:

http://abcnews.go.com

http://foodbabe.com/beer/

http://www.physics.org/article-questions.asp?id=115

http://www.andersonhealthemporium.com

http://www.allergeaze.com/PDFs/NA/NA55.PDF

http://www.businessinsider.com

http://www.atsdr.cdc.gov/substances/toxsubstance.asp?toxid=240