5 "Healthy" Foods You Should Think Twice About Eating

Author: Alex, Indoor Air Quality (IAQ) & Health Specialist (8 Years Experience)

Reviewer: Hannah, Oversea Marketing Director at Airwoods & Expert in Freeze Dryer and Sunfoot Shoes Dryers (5 Years home appliance experiences)

When we decide to eat healthier, many of us turn to popular "health foods" to replace our usual snacks. However, some of these foods are cleverly disguised. Behind their healthy reputation hides high amounts of sugar, fat, and calories.

Here are five widely misunderstood foods that are often perceived as beneficial, along with a look at their actual nutritional profiles.

1. Taro Paste

The Myth: A healthy, low-calorie whole grain.

The Reality: A mixture heavily processed with added sugar and fat.

Many people assume taro paste is healthy because it is made from taro root. Pure taro is indeed a nutritious root vegetable; 100 grams of plain taro contains only 56–85 kcal (half the calories of white rice) and has a low glycemic index (GI) of 50–55.

However, taro paste is rarely just mashed taro. Pure taro lacks a strong flavor, so to achieve that sweet, rich taste found in milk teas and desserts, manufacturers add large amounts of sugar, cream, butter, and condensed milk.

Once processed into taro paste, its original benefits are lost. It becomes a high-calorie, fast-absorbing food. For instance, commercial taro paste can reach up to 230 kcal per 100g—nearly three times higher than steamed taro—with a fat content soaring to 18%.

Advice: If you want the health benefits of taro, eat the original, unprocessed root. Treat taro paste as a dessert, not a diet food.

2. 100% Fruit Juice

The Myth: A convenient way to consume healthy fruits.

The Reality: A concentrated glass of liquid sugar.

It is easy to assume that since fruit is healthy, fruit juice must be healthy too. But fruit juice is not a concentration of fruit nutrients; it is a concentration of fruit sugar.

For example, a 500ml glass of orange juice contains roughly 48 grams of sugar. For comparison, 500ml of cola contains about 53 grams of sugar. Drinking a large glass of juice almost exhausts your entire recommended daily limit for added sugars (which should be kept under 50g, ideally below 25g).

Furthermore, liquid fructose is absorbed very quickly. Research shows that high fructose intake is linked to an increased risk of non-alcoholic fatty liver disease. A study published in Cell Metabolism demonstrated that fructose is 2 to 3 times more effective at increasing liver fat than glucose [1].

Excessive fructose intake is also associated with elevated uric acid levels (increasing gout risk) and decreased insulin sensitivity.

Advice: Whole fruits are safe and highly recommended, as their fiber slows sugar absorption. If you want the benefits of fruit, eat them whole rather than drinking them.

3. Flavored Oatmeal

The Myth: A high-fiber, whole-grain breakfast.

The Reality: Highly processed food loaded with added sugar.

Pure oats are undeniably healthy. Research indicates that consuming 60–80 grams of oats daily can help lower blood lipids, manage blood sugar, and improve digestion [2].

However, the "flavored oatmeal" found on supermarket shelves is a different story. These products fall into three highly processed categories:

1. Mixed Fruit & Nut Granola: While it contains grains and dried fruit, it is often baked in oil and heavily coated in refined sugar.

2. Instant Flavored Oatmeal Packets: To make them taste creamy and sweet, manufacturers add non-dairy creamers and sugar, which often outweigh the actual oat content. The extensive processing also reduces their dietary fiber to around 1g/100g (compared to 6g/100g in pure oats), causing a rapid spike in blood sugar.

3. Cereal Loops: Despite being marketed as whole grains, these are essentially refined flours molded into shapes, completely lacking the benefits of whole oats and packed with sugar.

Advice: When buying oats, check the ingredient list. The only ingredient should be "rolled oats."

4. Dairy-Flavored Drinks

The Myth: A nutritious yogurt alternative. The Reality: Sugar water with a hint of dairy.

Yogurt is a genuinely healthy food. It is rich in protein, suitable for people with lactose intolerance, and contains probiotics that support gut health. However, many people accidentally purchase "dairy-flavored drinks" instead of actual yogurt.

These drinks are primarily composed of water and sugar, with only a small amount of milk powder or flavoring added. They offer very little nutritional value and significantly increase the risk of obesity, especially in children, while reinforcing a preference for sugary foods.

Advice: To avoid being misled, check the label:

1. Look at the protein content: Genuine yogurt must contain at least 2.9g/100g of protein (or 2.3g/100g for flavored yogurt). Do not buy it if the protein is below 2%.

2. Check added sugars: Opt for no-added-sugar or low-sugar varieties (under 5g/100g).

3. Check probiotic strains: Choose reputable brands with stable probiotic strains capable of surviving stomach acid [3].

5. Fruit and Vegetable Chips

The Myth: A natural, low-calorie snack.

The Reality: High in fat, salt, and calories.

Many believe that swapping potato chips for vegetable chips is a healthy choice. Unfortunately, most commercial veggie chips are far from healthy.

Currently, there are two main processing methods: Vacuum Frying (VF) and Freeze-Drying (FD) [4].

• VF (Vacuum Frying): The frying process significantly increases the fat content. Because dried vegetables have a porous structure, they act like sponges for oil. A typical fruit chip can contain up to 500 kcal and 14.9g of fat per 100g.

• FD (Freeze-Drying): While freeze-drying does not add fat, the calorie density is still very high because the water is removed. For example, 100g of freeze-dried bananas contains 1674 kJ of energy, compared to just 371 kJ for fresh bananas.

Additionally, to enhance the flavor, manufacturers often coat these chips in excessive amounts of salt and sugar, leading to high sodium and sugar intake.

Advice: Stick to fresh fruits and vegetables. If you need a snack, choose plain freeze-dried fruits with zero added sugar or oil, but still consume them in moderation.

Ultimately, it is not that these foods are inherently "bad," but there is a significant gap between how they are marketed and their actual nutritional profiles. By reading ingredient labels carefully, you can avoid these hidden traps and make genuinely healthy choices.

Nutritional Information of Fresh Bananas and Snack Products (per 100g)

References

[1] Jang C, Hui S, Lu W, Cowan AJ, Morscher RJ, Lee G, Liu W, Tesz GJ, Birnbaum MJ, Rabinowitz JD. The Small Intestine Converts Dietary Fructose into Glucose and Organic Acids. Cell Metab. 2018 Feb 6;27(2):351-361.e3.

[2] Whitehead A, Beck EJ, Tosh S, Wolever TM. Cholesterol-lowering effects of oat β-glucan: a meta-analysis of randomized controlled trials. Am J Clin Nutr. 2014 Dec;100(6):1413-21.

[3] Ohtsu T, Takagi A, Uemura N, et al. The Ameliorating Effect of Lactobacillus gasser OLL2716 on Functional Dyspepsia in Helicobacter pylori-Uninfected Individuals: A Randomized Controlled Study. Digestion 2017,96:92-102.

[4] Liang Zhaoxin, Wang Xuechao, Chen Hongbin. Practical Technology and Supporting Equipment for Vacuum Low-Temperature Frying of Fruit and Vegetable Chips [J]. Guangxi Agricultural Sciences, 2003(1):54-56. DOI:10.3969/j.issn.2095-1191.2003.01.028.

[5] Bananas, Raw.” USDA, Apr. 2018, https://fdc.nal.usda.gov/food-details/173944/nutrients.