Lots of folks wonder, Are potatoes bad when green. It’s a super common question, especially when you see those little green spots on your potatoes. For people just starting out in the kitchen, it can be a bit confusing to know what’s safe to eat.
Don’t worry, though. We’ll break it down super simply, step by step, so you know exactly what to do. Next, we’ll explore what makes them turn green and why that matters.
Why Do Potatoes Turn Green
Potatoes turn green when they are exposed to light for too long. This exposure happens after they are harvested and stored. When a potato sits around and sees sunshine, or even bright indoor light, it starts to make chlorophyll.
Chlorophyll is the same stuff that makes leaves green in plants. It’s a natural process that helps the plant, but for us eating the potato, it can be a sign of something else.
The Role of Solanine
The green color isn’t the only thing to think about. When potatoes get green, they also start to make a chemical called solanine. Solanine is a type of glycoalkaloid.
It’s a natural toxin that potatoes produce to protect themselves from insects and diseases. Think of it like the plant’s own defense system. Solanine is found in the skin and just under the skin of the potato, especially in the green areas.
It can also be found in the sprouts of the potato.
The amount of solanine in a potato is usually very small. Most of the time, it’s not enough to cause any real problems for us. However, if a potato has a lot of green on it, or if it has started to sprout a lot, the solanine levels can get higher.
This is where the concern comes in. Eating too much solanine can make you feel sick.
Are Potatoes Bad When Green
So, to directly answer the question Are potatoes bad when green. The answer is yes, they can be, if the greening is extensive. It’s not the green color itself that’s the main problem, but what the green color signals – the presence of solanine.
Potatoes with a light green tint or small green spots are usually okay to eat. You can simply peel off the green part, and the rest of the potato should be fine. The key is to remove all of the green areas.
However, if a potato is heavily green all over, or if it has significant sprouting, it’s best to throw it away. This is because it’s hard to remove all the solanine from heavily affected potatoes. The solanine can spread throughout the potato.
Eating a potato that has a high concentration of solanine can lead to solanine poisoning. This is also sometimes called potato sickness.
Symptoms of Solanine Poisoning
If you eat a potato with too much solanine, you might experience some unpleasant symptoms. These can show up a few hours after eating. Common symptoms include stomach upset, nausea, vomiting, and diarrhea.
Some people might also get a headache, dizziness, or even confusion. In very rare and extreme cases, it can cause more serious health issues.
It’s important to remember that these severe reactions are uncommon. They usually happen when someone eats a very large amount of green potato or a potato that is extremely high in solanine. For most people, a small bit of green potato that’s been peeled away won’t cause any issues at all.
The taste can also be affected; potatoes with high solanine can taste bitter.
How to Prevent Potatoes From Turning Green
The best way to avoid the problem of green potatoes is to store them properly. Potatoes need to be kept in a cool, dark, and dry place. Think of a pantry, a cellar, or a dark cupboard.
The ideal temperature for storing potatoes is between 45 and 55 degrees Fahrenheit (7 to 13 degrees Celsius).
- Keep them away from light. Store them in a paper bag, a burlap sack, or a dark bin.
- Avoid storing them with onions. Onions release gases that can make potatoes sprout faster.
- Don’t wash potatoes before storing them. Moisture can encourage rot and spoilage.
- Check your potatoes regularly. Remove any that are starting to go bad or sprout.
If you buy potatoes and notice they have some green on them, try to cut it off as soon as possible. The longer they sit in the light, the more solanine they will develop. When you’re cooking with potatoes, always look at them before peeling.
If you see significant greening, it’s a warning sign.
When to Discard a Green Potato
Deciding whether to keep or discard a green potato is key to staying safe. Here’s a simple guide:
- Small Green Spots: If there are just tiny green spots, you can peel them off thoroughly. Make sure to remove a little extra potato around the green area to be safe.
- Noticeable Green Skin: If a good portion of the potato’s skin is green, it’s safer to toss the whole potato. It’s hard to be sure you’ve removed all the solanine.
- Sprouting Potatoes: Potatoes that have long, white sprouts are also developing higher levels of solanine. If the sprouts are small and few, you can remove them along with the green skin. If the sprouts are large or there are many of them, it’s best to discard the potato.
- Bitter Taste: If a potato tastes bitter, this is a sign of solanine. Even if you can’t see much green, the bitterness means solanine is present, and you should not eat it.
It’s always better to be safe than sorry when it comes to your food. If in doubt, throw it out. Your health is more important than saving a potato.
Comparing Different Potato Storage Methods
Proper storage makes a big difference in how long potatoes last and whether they turn green. Let’s look at some common ways people store potatoes and what works best.
| Storage Method | Pros | Cons | Effect on Greening |
|---|---|---|---|
| Pantry/Dark Cupboard (Cool, Dry) | Keeps potatoes cool and dark. Good air circulation if in a breathable container. | Can get warm in some homes. Needs a container to keep out light. | Low risk of greening if consistently dark and cool. |
| Refrigerator | Very cool. Slows down sprouting. | Can make potatoes taste sweet and change their texture when cooked due to starch turning to sugar. Not ideal for long-term storage. | Minimal risk of greening due to darkness, but not recommended for best quality. |
| Plastic Bag in Light | Easy to store. | Traps moisture. Promotes sprouting and rot. Exposes potatoes to light if the bag is clear. | High risk of greening and spoilage. |
| Paper Bag/Burlap Sack (Cool, Dark) | Allows air circulation. Keeps potatoes dark. Breathable material helps prevent moisture buildup. | Needs a cool, dark place to be effective. | Low risk of greening. This is a great method. |
As you can see from the table, keeping potatoes cool, dark, and dry is the winning combination. Avoid clear plastic bags and direct sunlight. A breathable container in a dark pantry is usually the best bet for most households.
How Much Solanine Is Too Much
It’s hard to give an exact number for how much solanine is “too much” because it varies from person to person. However, scientists have some general guidelines. For adults, symptoms might start to appear if they consume around 200-400 milligrams of solanine.
This amount is found in a few pounds of potatoes that have significant greening or sprouting.
The average potato contains very small amounts of solanine, often less than 10 milligrams per 100 grams. Even green potatoes usually have much less than the dangerous levels. The problem arises when a potato is left in the light for a very long time, causing the solanine to build up significantly in the green parts and sprouts.
If you eat a potato with a small green spot and peel it off, you are likely consuming only a tiny fraction of solanine, far below any harmful level. The risk is higher with potatoes that are almost entirely green or have very large sprouts.
What About Baby Potatoes or New Potatoes
Baby potatoes, also called new potatoes, are harvested when they are very young and small. They have thin skins and are often eaten with the skin on. Because of their thin skins and short time from harvest to table, they usually have very little solanine.
It’s rare for baby potatoes to develop significant greening or sprouts before you eat them.
If you do notice a small green spot on a baby potato, you can still safely peel it off. The thin skin means that any greening will be very superficial. The risk of solanine poisoning from baby potatoes is extremely low.
Their delicate nature means they are typically enjoyed soon after purchase, minimizing exposure time.
Frequently Asked Questions
Question: Can I eat potatoes that have a few small green spots
Answer: Yes, you can eat potatoes with small green spots as long as you thoroughly peel off all the green parts. Cut away a little extra potato around the green area to be safe.
Question: What happens if I eat a potato with a lot of green
Answer: Eating potatoes with extensive greening can cause symptoms like nausea, vomiting, stomach pain, and diarrhea. This is due to higher levels of solanine.
Question: How should I store potatoes to prevent them from turning green
Answer: Store potatoes in a cool, dark, and dry place. Use a breathable container like a paper bag or burlap sack and keep them away from light.
Question: Do green potatoes taste bad
Answer: Yes, potatoes that have a high amount of solanine often taste bitter. This bitterness is a sign that the solanine level is elevated.
Question: Is it safe to feed green potatoes to pets
Answer: No, it is not safe to feed green potatoes or potato plants to pets. They contain solanine, which is toxic to animals as well as humans.
Final Thoughts
Are potatoes bad when green is a question that has a straightforward answer. Potatoes that have turned green can be harmful due to the presence of solanine. However, small green spots are usually not a problem if removed.
Always store potatoes properly in a cool, dark place. If a potato is heavily green or has large sprouts, it is safest to discard it entirely. Enjoy your potatoes knowing how to keep them safe and tasty.