Can You Eat the White Part of the Watermelon? | Smart Choice

Most people eat watermelon down to the pink and toss the rest. That white rim between the red and the green usually lands in the compost or the trash. It feels like the protective part — something too tough or bland to bother with.

It turns out that pale strip is not only edible but packs a different nutrient profile than the sweet flesh. The white rind is crunchy, mild, and contains a compound called L-citrulline that has drawn research interest for circulation and exercise recovery. So the answer to whether you can eat it is a straightforward yes.

The Rind’s Basic Safety Profile

The white layer is botanically the mesocarp. It is the part of the fruit that holds the whole structure together between the sweet endocarp and the tough exocarp.

Per the safe to eat rind overview at Healthline, the white rind is generally considered safe for most people to eat, just like the pink flesh. The green skin is also edible, though tougher and more bitter.

No special preparation is needed beyond washing the outer skin. Some people peel the green part off and eat just the white, which has a cucumber-like crunch and a mild, slightly vegetal flavor.

Why You Throw It Away

The habit of tossing the rind makes perfect sense. It does not taste like the pink part. It is paler, less sweet, and firmer. Culturally, it is just what people do. But from a nutrition standpoint, it is a missed opportunity.

• Texture expectations: The pink flesh is soft and juicy. The rind is firm and crunchy. People expect that first bite to melt, and the rind delivers something completely different.
• Sweetness difference: The rind contains far less sugar than the flesh. If you eat watermelon for the sweet bursts, the rind will not satisfy that craving directly.
• Convenience habit: It takes extra work to peel or cook the rind. In a world of pre-cut fruit bowls, the rind is an extra step most people skip.
• Lack of awareness: Most people do not know the rind offers different nutrients. It is not widely promoted as edible, even though many cuisines around the world already pickle, stir-fry, or juice it.

Once you know the rind is safe and has its own nutritional value, it becomes easier to try. Many cuisines around the world already pickle, stir-fry, or juice the rind.

L-Citrulline and the Nutrient Breakdown

The main reason the white rind gets attention from researchers is L-citrulline. This amino acid is found throughout the watermelon, but the concentration is notably higher in the rind.

A peer-reviewed paper hosted by NIH directly compared the two parts — rind more citrulline is the key reference for this point. The paper confirms the rind contains a significant amount of this compound relative to the flesh.

L-citrulline plays a role in the nitric oxide system. It converts to arginine in the kidneys, which then supports nitric oxide production. Some studies suggest this may help with vascular function and exercise recovery over the longer term.

These numbers come from pooled nutrition data. Individual watermelons vary based on variety, ripeness, and growing conditions. But the pattern is clear: the rind is not empty calories.

How to Eat the White Rind

If you decide to give the rind a try, there are several ways to eat it. The simplest method requires almost no effort.

1. Eat it raw: Wash the outside of the watermelon. Cut off the green skin with a knife or vegetable peeler. Slice the white part into strips or cubes. It has a mild flavor and a texture very similar to cucumber.
2. Pickle it: This is a common preparation in the Southern United States. The rind is simmered in a brine of vinegar, sugar, and spices until tender. It becomes a sweet-tart condiment.
3. Stir-fry or curry: In many parts of Asia and the Middle East, the rind is cut into chunks and cooked in savory dishes. It absorbs the flavors of the sauce while keeping a slight crunch.
4. Juice or smoothie: Toss chunks of the white rind into a blender with lime, mint, and a little sweetener. It blends smoothly and adds fiber and citrulline without dominating the flavor.

Cooking the rind softens the crunch. The green skin becomes gummier when cooked, so many recipes call for peeling it off first before cooking the white part alone.

What the Research Actually Says About Benefits

The research on watermelon rind is promising but still emerging. Human trials specifically on the rind are fewer than trials on the flesh or whole fruit.

The white rind also contains vitamin A, vitamin C, fiber, potassium, and magnesium. These are the same nutrients found in the flesh, but the ratios shift slightly in the rind, making it a worthwhile addition rather than a waste product.

Watermelon is the richest known natural source of citrulline. The Rind More Citrulline paper explains the mechanism in detail. L-citrulline enhances circulating L-arginine levels, which improves the synthesis of nitric oxide over time.

Longer-term consumption of watermelon and L-citrulline may improve vascular function. The effects are modest and should not be exaggerated — it is a food, not a medication.

The Bottom Line

Yes, you can eat the white part of the watermelon rind. It is safe, crunchy, and offers a different nutritional profile than the pink flesh — particularly in L-citrulline, fiber, and certain vitamins. You can eat it raw, pickled, or cooked.

If you have a medical condition that requires you to track potassium or amino acid intake closely, a registered dietitian can help you fit watermelon rind into your specific daily targets without surprises.