The Health Halo: How Product Descriptions (and the Color Green) Are Fooling You into Eating More

As a dietitian trying to make food and nutrition a little more manageable and a little easier to understand for my clients, I have a pet-peeve. I may have several, but for today I want to talk about “health halos”. You may not know the term, but you have definitely seen it in action. You pick up a bag of trail mix labeled “all-natural” or a yogurt that says, “pure and simple”. You’ve seen a box of “wholesome” cookies with pictures of farmland and a nature-green background. So, in a split second, you make an unconscious decision that the food is healthy.

This is the health halo effect and it’s a term that describes a well-documented cognitive bias: when a food carries a single positive attribute, our brains tend to assume the whole product is good for us. One virtuous word on a label or one virtuous color on a package casts a halo over everything else.

“People often see these labels as proof that the food is good for them. When they see them, they stop reading the rest of the food label.”

- Marion Nestle, PhD, retired professor of nutrition and food studies, New York University

The green effect: when color becomes the claim

Before a single word on a package is read, the color has likely already done its work. Studies have consistently found that consumers rate identical foods as healthier, lower in calories, and more nutritious when presented in green packaging compared to red or white packaging. In one widely cited experiment, participants rated a chocolate bar in green packaging as having fewer calories than the same bar in red packaging…even when both showed the same nutrition label. Researchers call this “nutritional color bias.”

This extends beyond packaging. Restaurant menus that use green fonts or leaf icons for certain items cause diners to underestimate those items’ caloric content and order larger portions alongside them. A salad described in green text next to a brown-toned burger description might be perceived as so virtuous that it licenses the fries.

Exploring a few halo terms or common label traps

Organic

Organic certification tells you how a food was farmed…specifically, that it was grown and processed without synthetic pesticides, fertilizers, or genetic engineering. What it does not tell you is anything about the food’s nutritional profile. An organic cookie is still a cookie.

Gluten-Free

For the roughly one percent of people with celiac disease, avoiding gluten is medically necessary. Some people may have a sensitivity to gluten, making this identification helpful, but it doesn’t necessarily mean it’s healthier.

Natural

Of all the labels on a package, “natural” may be the least regulated and therefore the most misleading. The word has no official legal definition under FDA standards for most food categories. It implies something wholesome and unprocessed, but could be loaded with high-fructose corn syrup, artificial flavors, and heavily refined ingredients. Consumers surveyed about the word consistently rate “natural” products as healthier than identical products labeled without it, despite no difference in the actual food.

Low-Fat and Low-Calorie

Nutrient-specific claims like “low fat,” “reduced calorie,” or “light” trigger what researchers call the licensing effect…a subconscious sense that having made a healthy choice earns you permission to eat more. In my day, this was the diet coke and cheesecake scenario…I had the no-calorie soda so of course, I have room for the indulgent treat!

Tips to navigate through it

• The nutrition facts panel and ingredient list are the actual data. Make a habit of reading both before any front-of-package claim sways you.

• “Gluten-free” says nothing about sugar. “Low fat” says nothing about calories. “Organic” says nothing about nutritional density. Treat each claim as incomplete information.

• Green packaging is not a nutrition label. Neither is a leaf, a nature scene, or earthy brown tones. Ask yourself: is the color making the claim, or is the food?

• If you find yourself eating more of something because it feels virtuous, that’s the halo at work. The actual serving size doesn’t change because of a label.

• Look at the nutrition facts of the “healthy” labeled version alongside the standard product. The differences are often smaller than the premium price suggests.

• “USDA Organic” and “gluten-free” have legal definitions. “Natural,” “superfood,” “clean,” and “plant-based” largely don’t. Regulated claims carry more weight, but still don’t tell the whole story.

The halo is designed to stop you from reading further. Reading further is the entire point.

Sources & Further Reading

WebMD: Health Halo Foods Explained • IFT Food Technology Magazine: Gauging the Health Halo Effect • Marion Nestle, NYU Dept. of Nutrition and Food Studies • Academy of Nutrition and Dietetics • FDA Label Claims Database • USDA National Organic Program