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Should you eat the skin of an avocado? Unpacking the nutrition, risks, and edible varieties

4 min read

According to a 2017 FDA report, harmful bacteria like Salmonella and Listeria were found on a percentage of avocado skins, highlighting the importance of proper washing before consumption. Given this fact and its tough texture, the question remains: should you eat the skin of an avocado, and is it even safe?

Quick Summary

The skin of common avocados like Hass is generally not consumed due to its tough, bitter taste and high fiber content, which can be hard to digest. While some unique varieties have thin, edible skins, most contain persin, a compound toxic to many animals but harmless to humans in low concentrations. Concerns include pesticide residue and bacterial transfer from the unwashed skin to the edible flesh during cutting.

Key Points

  • Not Recommended for Most Avocados: The skin of common varieties like Hass is tough, bitter, and generally not considered edible.

  • Contains Persin: Avocado skin contains persin, a toxin harmless to most humans but dangerous for many animals like birds, horses, and rabbits.

  • Prioritize Food Safety: Always wash avocados thoroughly before cutting, as the skin can harbor harmful bacteria like Listeria and pesticides that a knife can transfer to the flesh.

  • Edible Variety Exception: Some lesser-known, thin-skinned varieties like Mexicola and Puebla have skins that can be safely eaten.

  • Repurpose the Peel: Instead of eating it, use avocado skins for composting, creating natural dyes, or as a DIY face scrub.

  • Antioxidant Source: While avocado skin contains antioxidants, it's not a practical or palatable way to obtain them, and the flesh provides excellent nutrition.

  • High in Fiber: The skin is very fibrous, which can be difficult to digest and may cause discomfort.

In This Article

The Case Against Eating Avocado Skin

For the average consumer enjoying a Hass avocado, eating the skin is generally advised against for several key reasons, spanning taste, texture, digestion, and food safety. While the flesh is prized for its creamy texture and healthy fats, the skin presents a very different—and unappealing—proposition.

The Texture and Taste Hurdle

The skin of the popular Hass avocado is tough, thick, and has a leathery, bumpy texture. Attempting to chew and swallow this material would be an unpleasant and difficult experience. Even if you were able to get past the texture, the taste is often described as bitter and unappetizing. The culinary experience of eating avocado skin simply does not measure up to the rich, nutty flavor of the flesh.

Persin: The Fungicidal Toxin

All parts of the avocado plant, including the leaves, bark, skin, and pit, contain a natural fungicidal toxin called persin. While low concentrations of persin in the ripe fruit are considered harmless to most humans, it is highly toxic and dangerous for many animals, including birds, rabbits, horses, and ruminants. The concentration of persin is higher in the skin and pit, which is another reason it's best to avoid consumption, especially if you have a known allergy or sensitivity. For most humans, any adverse effects from persin are extremely rare, but it's not a compound you need in your diet.

Risks of Pesticide and Bacteria Contamination

Avocados are grown with pesticides and can harbor harmful bacteria like Salmonella and Listeria on their bumpy outer skin. Even if you don't plan to eat the skin, it is critical to thoroughly wash the avocado before cutting it. A knife slicing through the contaminated skin can drag bacteria and pesticide residue directly into the clean, edible flesh inside. This risk alone is a strong argument for proper washing and not consuming the peel.

Potential Nutritional Benefits and Edible Varieties

Despite the downsides of eating the skin of common varieties, some evidence suggests potential nutritional benefits, and certain specific varieties have thin, edible skins.

High Antioxidant and Fiber Content

Some reports indicate that the skin of the Hass avocado is particularly rich in antioxidants like phenols, flavonoids, and chlorophyll, even more so than the flesh itself. Avocado skin also contains dietary fiber, which supports healthy digestion. However, obtaining these nutrients from a tough, bitter, and fibrous peel is impractical and unnecessary, as the flesh itself is already a nutritional powerhouse packed with vitamins, minerals, and healthy fats.

Avocado Varieties with Edible Skin

For those determined to eat avocado skin, there are a few less common varieties that feature thin, smooth, and genuinely edible peels.

  • Mexicola: This variety is known for its small size, black edible skin, and rich flavor.
  • Puebla: One of the historical avocado varieties responsible for the industry in Southern California, the Puebla has a thin, dark purple-black skin that is edible.
  • Cocktail Avocados: These seedless, small, and oblong fruits have a smooth, thin, edible skin.

Note: These varieties are not commonly found in most grocery stores and have different flavor and texture profiles than the popular Hass avocado.

A Comparison of Avocado Skins

Feature Hass Avocado Skin Edible-Skin Varieties (e.g., Mexicola, Puebla)
Texture Tough, thick, and leathery Thin, smooth, and easily chewed
Taste Bitter and unappetizing Milder, sometimes with an anise-like flavor
Toxicity Contains low levels of persin, potentially higher in skin Contains persin, but concentrations are low enough to be consumed safely by humans
Availability Widely available in most grocery stores globally Rare; often found in specialty or local markets
Preparation Must be peeled and discarded due to texture Can be eaten whole with the flesh
Use Primarily for flesh in guacamole, toast, and salads Suitable for slicing and eating whole

Practical Ways to Utilize Avocado Skins

If you're looking for ways to use your leftover avocado skins without eating them, you're in luck. There are several creative and eco-friendly options.

  • Composting: Avocado peels, while slow to decompose, are a great addition to your compost pile. Cut them into smaller pieces to speed up the process.
  • Natural Plant Fertilizer: For a quicker nutrient boost, dry the peels and grind them into a powder to mix into your garden soil.
  • DIY Face Scrub: The residual flesh on the inside of the peel can be rubbed on your skin for a gentle, moisturizing exfoliation.
  • Natural Fabric Dye: Boiling avocado peels can create a natural dye for fabrics, yielding various shades of pink or peach.
  • Avocado Tea: Some traditional preparations involve sun-drying the peels and using them to make a tea infusion, which can provide antioxidants.

Conclusion

For the vast majority of consumers, eating the skin of an avocado is an unnecessary and unappetizing practice. While the skin contains some nutrients, its tough texture, bitter flavor, and the risk of harboring bacteria and pesticide residue make it undesirable for consumption. The small, thin-skinned edible varieties are an exception, but they are not the norm. The best and safest practice is to thoroughly wash the avocado before cutting, remove and discard the skin, and enjoy the delicious and nutritious flesh. For those who want to be sustainable, there are creative ways to repurpose the skins for your garden or skincare routine.

What to Do with Your Avocado Peel

Instead of eating the skin, here are some smart and safe alternatives:

  1. Always wash the avocado first, regardless of your intention.
  2. Compost it for nutrient-rich soil.
  3. Use it for a DIY face scrub by rubbing the leftover flesh on your skin.
  4. Create natural dye for fabrics.
  5. Use it as a seedling starter by filling the hollowed-out skin with compost.
  6. Dry and grind it into a powder for soil enrichment.
  7. Consult a certified professional before making significant dietary changes involving less common ingredients like avocado peel.

By following these recommendations, you can make the most of your avocado while avoiding the potential pitfalls of consuming the skin.

Food Network: You Really Should Be Washing Your Avocados

Frequently Asked Questions

For most humans, avocado skin is not considered poisonous, but it is generally not eaten due to its tough texture and bitter taste. It contains a compound called persin, which is highly toxic to many animals but usually harmless to people.

The skin of a Hass avocado is tough, fibrous, and has an unpleasant, bitter taste. Additionally, it can carry harmful bacteria and pesticides from the surface, which a knife can transfer to the flesh.

No, some rare and specific varieties, such as Mexicola, Puebla, and Cocktail avocados, have thin, edible skins. However, these are not the common varieties found in most supermarkets.

Persin is a natural fungicidal toxin found in the avocado plant. While toxic to many animals in high doses, the amount in ripe avocado fruit and skin is generally considered safe for human consumption.

Avocado skins can be used for composting, creating natural fabric dyes, or for a homemade face scrub. For gardening, drying and grinding the peels into a powder can enrich soil.

Before cutting into an avocado, thoroughly wash the exterior with cool or lukewarm water and scrub the surface gently. This prevents bacteria from being transferred from the skin to the flesh by your knife.

While some recipes suggest drying and grinding avocado peel for culinary uses, the tough texture and bitter flavor persist. Cooking does not eliminate the unpleasant characteristics or the potential for lingering contaminants, so it is still not recommended for human consumption.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.