Watermelon is undoubtedly one of our favorite fruits—especially when temperatures start to rise. Fresh, juicy, and naturally sweet, it delivers hydration, quick energy, and a satisfying crunch in every bite. Because it is composed of more than 90% water, watermelon is particularly refreshing during hot weather and can help support hydration when temperatures exceed 30°C.

Beyond its cooling effect, watermelon contains vitamins such as vitamin C and vitamin A, along with antioxidants like lycopene. It also has a mild diuretic effect, which may help the body eliminate excess fluids and reduce temporary water retention. Affordable, widely available, and easy to store whole for several days, watermelon is often considered one of summer’s healthiest treats.

However, despite its many benefits, watermelon is not entirely without risk. There are certain issues consumers should be aware of to avoid potential health problems.

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When Watermelon May Be Unsafe

Although rare, some watermelons can pose safety concerns. One warning sign appears when you cut the fruit open and notice large internal cracks or hollow cavities in the flesh.

Many people assume this is harmless and continue eating it. In most cases, internal cracking is caused by uneven growth, pollination problems, or sudden changes in temperature during cultivation. However, in some discussions, cracks have been associated with the use of growth regulators.

One chemical that has raised concern is Forchlorfenuron, a plant growth accelerator sometimes used in agriculture to increase fruit size. It is sprayed on crops to stimulate cell division and promote faster growth.

Why Is This a Concern?

There have been debates about whether excessive exposure to certain plant growth regulators could pose health risks. Some claims suggest possible links to neurological or long-term health effects, though regulatory agencies in many countries allow controlled use within specific safety limits.

It’s important to note that internal cracks alone do not automatically mean a watermelon contains harmful chemicals. Cracking can occur naturally. However, if the fruit looks abnormal, has an unusual texture, tastes bitter, or appears overly soft and watery, it’s safer to avoid consuming it.

When in doubt, discard the fruit rather than take a risk.

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Other Potential Risks to Consider

Even without chemical concerns, watermelon can cause issues in certain situations:

• Overconsumption may lead to bloating or digestive discomfort due to its high water and natural sugar content.

• People with diabetes should monitor portion sizes because watermelon has a relatively high glycemic index.

• Eating improperly stored watermelon may increase the risk of bacterial contamination.

Like any food, moderation and proper storage are key.

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How to Choose a Good Watermelon

Selecting a high-quality watermelon significantly reduces the risk of problems.

Look for:

• A firm, smooth rind without soft spots

• A creamy yellow “ground spot” (where it rested on the soil)

• A heavy weight for its size (indicating high water content)

• A hollow sound when tapped

• Clearly defined stripes

Avoid watermelons with visible bruises, cracks on the outside, or signs of leakage.

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How to Keep Watermelon Fresh

Proper storage helps maintain both freshness and safety.

1. Store It Whole When Possible

Keep the watermelon whole until you’re ready to eat it. A whole watermelon lasts longer because the protective rind prevents bacterial contamination.

2. Keep It Cool

While you can store a whole watermelon at room temperature away from direct sunlight, refrigeration slows the ripening process and extends freshness. Cooler temperatures also help preserve nutrients like vitamin C.

3. Refrigerate Immediately After Cutting

Once cut, watermelon begins losing moisture and freshness quickly. To keep it safe:

• Wrap tightly in plastic wrap or

• Place in an airtight container

• Refrigerate immediately

Cut watermelon should ideally be consumed within 3–4 days. Leaving it uncovered can cause it to dry out and absorb odors from other foods.

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Final Thoughts

Watermelon remains one of the most refreshing and hydrating fruits available. It supports hydration, provides antioxidants, and offers a naturally sweet energy boost—especially valuable during hot summer days.

However, being mindful of quality, appearance, and storage conditions is essential. If the fruit shows unusual internal cracks, abnormal texture, or strange taste, it’s better to avoid eating it.

Enjoy watermelon—but choose wisely, store it properly, and consume it in moderation to get the benefits without the risks.