Fruits are widely regarded as one of the healthiest foods we can eat. Rich in vitamins, fiber, and antioxidants, they are often recommended by doctors and nutritionists as a key part of a balanced diet. However, health experts warn that not all fruit sold on the market is safe to consume. Based on food safety research and medical observations, doctors caution that certain fruits—especially when improperly stored, overly processed, or artificially treated—may pose health risks. Price alone should never determine your choice.

Here are five types of fruit that doctors urge consumers to avoid, even when they are sold at very low prices.

1. Fruits With Unnatural White Residue or Wax Coating
One of the most common warning signs, as shown in the image, is fruit covered with an unnatural white or cloudy layer. While some fruits naturally produce a light protective bloom, excessive or uneven white residue may indicate artificial wax coatings or chemical preservatives. These coatings are sometimes applied to improve appearance and extend shelf life, but when poorly regulated, they can trap pesticides and bacteria on the fruit’s surface. Doctors advise avoiding fruits that look unnaturally shiny or chalky, especially if the coating cannot be easily washed off.

2. Overly Cheap Imported Fruits With No Clear Origin
Extremely cheap fruits may come from sources with weak food safety standards. In some cases, fruits are treated with chemicals to preserve freshness during long transportation periods. These substances may exceed safe limits or be banned in certain countries. Doctors warn that repeated consumption of chemically treated fruits may increase the risk of digestive problems, hormonal disruption, and long-term organ stress. Always check labels and prioritize fruits with clear origins and certifications.

3. Fruits Showing Signs of Mold or Soft Rot
Even small mold spots on fruit should not be ignored. Mold can produce mycotoxins—harmful substances that may spread beyond visible areas. Cutting off the moldy part does not make the fruit safe, as toxins may already be present throughout the flesh. Doctors emphasize that consuming mold-contaminated fruit can increase the risk of food poisoning, liver damage, and weakened immunity.

4. Fruits Stored for Excessively Long Periods
Some fruits are kept in cold storage for months before reaching consumers. While modern storage technology helps reduce waste, overly long storage can reduce nutritional value and increase the risk of chemical residue accumulation. Apples, for example, are sometimes stored for extended periods and treated with preservatives to maintain appearance. Doctors recommend choosing seasonal fruits whenever possible, as they are fresher and less likely to require heavy chemical treatment.

5. Fruits With Artificial Color or Uniform Appearance
Perfectly uniform size, color, and shape may seem appealing, but it can be a red flag. In nature, fruits vary. Artificial coloring agents or growth enhancers may be used to improve appearance, especially in low-cost produce. Some of these substances can irritate the digestive system or contribute to long-term health risks if consumed regularly. Doctors advise consumers to be cautious of fruits that look “too perfect” compared to natural standards.

How to Protect Yourself
Doctors stress that fruit itself is not the enemy—poor quality control is. To reduce risk, wash fruits thoroughly under running water, peel when appropriate, and buy from trusted vendors. Soaking fruits briefly in clean water with food-safe solutions may help remove surface residues. Most importantly, do not let price override safety. Cheap fruit is not a bargain if it compromises your health.