What Exactly is a Pip on an Apple?
In British English, a "pip" is the common term for a small seed found in fruit, particularly within an apple or orange. For Americans, this is typically referred to simply as an apple seed. These small, hard, dark brown or black seeds are housed in the apple's core, and their primary biological function is to germinate into a new apple tree.
The Apple's Botanical Structure
To fully appreciate what a pip is, it's helpful to understand the botanical anatomy of an apple. An apple is a 'pome,' a type of accessory fruit. This means the edible flesh isn't formed from the plant's ovary, but from the enlarged floral receptacle. The true fruit is the core itself, which is comprised of several distinct parts:
- Skin (Exocarp): The thin, outer protective layer.
- Flesh (Mesocarp): The juicy, edible part most people enjoy.
- Core (Endocarp/Carpels): The central, fibrous part that contains the seeds. It's essentially the tough inner chamber of the fruit.
- Pips (Seeds): The small, hard seeds, typically one or two per chamber (carpel) inside the core.
Is an Apple Pip Poisonous?
One of the most persistent myths about apples is that the pips are lethally poisonous. The truth is more nuanced. Apple seeds contain a compound called amygdalin, a cyanogenic glycoside that releases small amounts of hydrogen cyanide when crushed and digested. However, several factors make accidental poisoning from apple pips extremely unlikely:
- The Seeds Must Be Crushed: Amygdalin is only released when the seed is chewed or crushed. A whole, intact pip will pass through the digestive system harmlessly.
- High Dose Required: A lethal dose of cyanide is far higher than what could be released from a few accidentally-chewed seeds. A study suggests it would take around 83-500 crushed seeds to cause acute cyanide poisoning in an adult, which is an unrealistic quantity for casual consumption.
- Tough Core Protection: The hard, fibrous core and seed casing make it difficult to chew and crush the seeds by accident.
Comparing Pips with Stone Fruits
While apple pips are only a minor concern, the pits of other fruits have a different toxicity profile. Here is a comparison:
| Feature | Apple Pips (Seeds) | Stone Fruit Pits (e.g., Cherry, Peach) |
|---|---|---|
| Location | Contained within the fibrous, central core. | The hard, central 'stone' contains a single kernel/seed. |
| Structure | Small, dark brown/black seeds within multiple carpel chambers. | A single, large seed protected by a woody endocarp shell. |
| Toxicity | Contain amygdalin, releasing small amounts of cyanide when crushed. | Also contain amygdalin, releasing cyanide when the kernel is consumed. |
| Toxicity Concern | Very low risk due to small seed size and number. Large quantity needed to be dangerous. | Higher risk if the large kernel is deliberately crushed and eaten, though still requires a large dose. |
Growing an Apple Tree from a Pip
For those inspired to grow their own apple tree, planting a pip is a possibility, but there are important factors to consider. Apples grown from seeds are not genetically identical to the parent tree. The resulting tree will likely produce different, and often less desirable, fruit. For this reason, commercial apple varieties are not grown from pips but are propagated by grafting, where a desired variety is grown on a specific rootstock.
The Function of the Apple Core
The core's main job is to protect the seeds inside. It's a tough, fibrous area that is not particularly tasty or easy to chew, which is why most people discard it. Some people do eat the whole apple, core and all, with minimal risk, but it's largely a matter of personal preference and texture tolerance.
Common Myths About Apple Pips Debunked
- Myth: Eating a few apple seeds will kill you. Fact: The amount of cyanide released is tiny and harmless in small doses. You would need to eat an extremely large number of crushed seeds for it to be dangerous.
- Myth: Apple seeds are completely harmless. Fact: While a few are not dangerous, they are not entirely risk-free. It's best to avoid intentionally consuming large quantities of crushed seeds, particularly for children.
- Myth: All apple cores are inedible. Fact: The toughness of the core is the main reason it's typically discarded, not toxicity. Some people find no issue with eating the entire apple.
The Final Bite: The Truth About the Apple Pip
Ultimately, an apple pip is simply the seed, and the panic surrounding its toxicity is largely unwarranted for the average person. The body can safely process the small amount of amygdalin found in a few accidentally ingested pips. The main reason to discard the core is the fibrous, unpalatable texture, not a significant risk of poisoning. The next time you enjoy an apple, you can rest easy knowing that its pips are more of a botanical fact than a health risk.