Not all ingredients are created equal. While most food and supplement ingredients are safe, a growing body of research has raised concerns about certain additives commonly found in processed products. Here are the red flags to watch for.
Artificial Colors
Red 40 (Allura Red)
The most widely used food dye in the US. Studies have linked it to hyperactivity in children. Banned or requires warning labels in several European countries.
Yellow 5 (Tartrazine) & Yellow 6 (Sunset Yellow)
Common in candy, beverages, and cereals. Associated with allergic reactions and behavioral effects in sensitive individuals.
Blue 1 (Brilliant Blue)
Used in candy, beverages, and ice cream. Some studies suggest it may cross the blood-brain barrier.
Preservatives
BHA & BHT
Synthetic antioxidants used to prevent fats from going rancid. BHA is classified as "reasonably anticipated to be a human carcinogen" by the US National Toxicology Program.
Sodium Benzoate & Potassium Sorbate
Common preservatives. Sodium benzoate can form benzene (a known carcinogen) when combined with vitamin C (ascorbic acid) in acidic beverages.
Potassium Bromate
Used in bread and baked goods. Classified as a possible carcinogen. Banned in the EU, Canada, and China but still permitted in the US.
Artificial Sweeteners
Aspartame
One of the most studied food additives. WHO classified it as "possibly carcinogenic to humans" in 2023. Common in diet sodas, sugar-free gum, and low-calorie products.
Sucralose
600x sweeter than sugar. Recent research suggests it may affect gut bacteria and glucose metabolism.
Acesulfame Potassium (Ace-K)
Often combined with other sweeteners. Some researchers have raised concerns about its breakdown products.
Risky Oils
Seed Oils
Highly processed industrial seed oils that are high in omega-6 fatty acids. Excessive omega-6 consumption is associated with inflammation. These oils dominate ultra-processed foods.
Partially Hydrogenated Oils
Artificially created fats. FDA banned artificial trans fats in 2018, but trace amounts still appear in some products.
Palm Kernel Oil
High in saturated fat. Also associated with deforestation and environmental concerns.
Other Controversial Additives
Carrageenan
Seaweed extract used as a thickener. Studies suggest it may cause gut inflammation. Some organic food brands have removed it voluntarily.
MSG (Monosodium Glutamate)
Flavor enhancer. While generally recognized as safe by the FDA, some people report sensitivity symptoms (headaches, flushing).
How to Avoid Red Flag Ingredients
- Read ingredient lists — the fewer ingredients, generally the better
- Scan products with Product Scans — instant red flag detection and Health Score
- Look for "no artificial" labels — but verify, because "natural flavors" can still contain questionable ingredients
- Choose products with 3rd party testing — NSF, USP, ConsumerLab certified products undergo quality checks
- Compare alternatives — Product Scans suggests healthier alternatives when a product scores low
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