The Hidden Chemicals in Your Food: What the FDA Just Discovered (and Why It Matters)

At least 111 substances of unknown safety have been added to foods, drinks, and supplements sold in the United States without the FDA's knowledge or approval. A new investigation by the Environmental Working Group (EWG) revealed that food companies are exploiting a legal loophole called GRAS (Generally Recognized as Safe) to bypass federal oversight, allowing manufacturers to self-determine whether their ingredients are safe without submitting evidence to regulators.

How Did This Happen? Understanding the GRAS Loophole

The GRAS designation was created to streamline the approval process for ingredients with a long history of safe use. However, the system has a critical flaw: companies can legally decide on their own that an ingredient is safe without notifying the FDA or providing any scientific evidence. "Manufacturers now routinely exploit this GRAS loophole—it's fast becoming more 'generally recognized as secret' instead of 'generally recognized as safe,'" said Melanie Benesh, vice president for government affairs for the Environmental Working Group.

To meet the GRAS standard, companies are supposed to demonstrate safety using widely accepted scientific evidence that's publicly available and notify the FDA. But notification is voluntary, which means manufacturers can skip this step entirely. The EWG investigation found 49 of these unreviewed chemicals in approximately 4,000 products listed in the US Department of Agriculture's FoodData Central database.

What Are These Mystery Ingredients?

Many of the hidden chemicals sound natural and harmless on the surface. The EWG found 22 were plant extracts, including aloe vera, cinnamon, cocoa, cranberry seed oil, grape skins, green coffee beans, hemp, lemon balm, and mushrooms. But here's the problem: concentrated extracts are fundamentally different from whole foods.

"When you start taking substances from grape skin, aloe vera and mushrooms, for example, you may have a concentrated extract or cocktail of substances that come out of it," explained biochemist Maricel Maffini, a former research assistant professor at Tufts University School of Medicine who coauthored the EWG investigation. "You should be able to test that extract or cocktail if it is going to be in the marketplace".

Green tea extracts illustrate this danger perfectly. The EWG found green tea extracts never reviewed by the FDA in 901 products, including granola bars, energy bars, candy, chewing gum, ice cream, sodas, teas, waters, and seafood. While loose-leaf green tea you brew at home may fight inflammation and lower blood pressure, highly concentrated green tea extracts are linked to estrogen disruption and liver damage. There are at least 100 established cases of severe liver damage in people using concentrated green tea extracts sold for weight loss and muscle recovery.

Why Does This Matter for Your Health?

The concern extends beyond individual ingredients. A comprehensive review published in Frontiers in Nutrition traced how human diets have evolved from ancestral whole foods to modern ultra-processed foods laden with additives. The research shows that while early human diets relied on minimal additives beyond naturally occurring salts and fermentation, the modern food supply is increasingly characterized by synthetic dyes, preservatives, and artificial flavors with no precedent in evolutionary history.

Growing evidence demonstrates that non-nutritive dietary components exert biological effects beyond their intended purpose. Preservatives like benzoates and nitrites extend shelf life but may also influence systemic inflammation and the gut microbiome. Artificial flavors and colors enhance palatability, yet emerging studies suggest they can alter microbial communities or contribute to intestinal irritation. Non-nutritive sweeteners and sugar alcohols modify blood sugar responses but have been implicated in changes to satiety signaling and metabolic risk.

"Because the government has never reviewed these chemicals, consumers have no way of knowing if they are safe or carry unknown health risks," Benesh said.

Steps to Protect Yourself From Hidden Additives

• Read Beyond the Label: Look for ingredient lists that include unfamiliar plant extracts or chemicals. If you don't recognize an ingredient, research it independently rather than assuming "natural" means safe.
• Choose Whole Foods Over Extracts: Opt for whole fruits, vegetables, and herbs rather than products containing concentrated extracts. A cup of brewed green tea is fundamentally different from a green tea extract supplement or additive.
• Avoid Ultra-Processed Foods: Products with long ingredient lists containing preservatives, synthetic dyes, artificial flavors, and unfamiliar compounds are more likely to contain unreviewed additives.
• Watch for "Natural" Claims: The term "natural" is not regulated by the FDA and does not guarantee safety. Many herbs and plant extracts can interact with medications or cause serious health effects at concentrated doses.
• Prioritize Transparency: Support brands that disclose their full ingredient sourcing and processing methods, and avoid products from companies that use vague ingredient descriptions.

What Is the FDA Doing About This?

The FDA has recognized the problem and is taking action. In 2026, the agency announced major priority deliverables to address food chemical safety, including a significant overhaul of GRAS oversight. The FDA plans to publish a proposed regulation requiring companies to submit GRAS notices for all new substances claimed to be safe, ending the voluntary notification system that enabled this loophole.

Additionally, the FDA will conduct post-market safety reviews of chemicals already in the food supply, starting with those raising the most consumer concern, such as phthalates, propylparaben, butylated hydroxyanisole (BHA), and butylated hydroxytoluene (BHT). The agency is also prioritizing a shift from petroleum-based food dyes to natural alternatives and will expedite review of new natural color additives.

The FDA's Human Foods Program vision is to "ensure that food serves as a vehicle for wellness" by implementing science-based approaches to prevent foodborne illness, reduce diet-related chronic disease, and ensure chemicals in food are safe.

The Bigger Picture: How Our Diets Changed

Understanding how we got here requires looking at dietary history. Throughout most of human evolution, diets were based on regional, seasonal whole foods with minimal processing. The shift to agriculture, then industrialization, and finally ultra-processed foods happened gradually, but the pace of change accelerated dramatically in recent decades. Modern food systems prioritize shelf life, palatability, and convenience over nutritional integrity, introducing exposures with uncertain long-term physiological consequences.

The high energy density of modern diets combined with increased intake of food additives may be a major contributor to chronic diseases now pervasive throughout the global population, including metabolic syndrome, cardiovascular disease, and cancer. Gut health—encompassing gastrointestinal physiology, intestinal barrier integrity, and the gut microbiome—has become central to understanding the diet-disease relationship, and alterations in gut health have been implicated in colorectal cancer, cardiovascular disease, and arthritis.

The bottom line: you have a right to know what's in your food. Until the FDA's new GRAS reform takes effect, reading labels carefully and choosing whole foods over processed products remains your best defense against hidden additives of unknown safety.