Eggs. Garlic. Cheese. 8 unexpected foods that can go in the freezer.
As a dietitian — and a mom of two toddlers who constantly change their minds about what they'll eat — I've learned that freezing foods can be a game changer. It saves time, cuts down on waste and helps stretch the grocery budget. Plus, frozen foods can last for months, maintain their nutrition and still taste great.
While you can buy plenty of frozen items at the store, you might be surprised by how many fresh foods you can freeze right at home. I toss prewashed spinach in the freezer before it wilts for future smoothies, and cut up fresh fruit to save before heading out of town. But freezing isn't just for produce: Things like eggs, cheese, grains and even bread freeze well too. Freezing gives you more chances to use up what you buy, helps you take advantage of sales (think cheap summer berries!) and makes it easier to keep staples on hand for quick meals.
Here are eight surprising foods you can freeze — and how to do it right:
Eggs
Eggs usually last about three to five weeks when properly refrigerated, but if they're nearing their expiration date, freezing them is a smart way to avoid waste. They're great to have on hand for baking, scrambles, frittatas or casseroles.
How to freeze: Never freeze eggs in their shell. Instead, crack them open and store whole eggs or just the whites in a freezer-safe container. For easy measuring, pour them into an ice cube tray (one per slot) and freeze. Yolks can get thick and gooey when frozen, so the American Egg Board recommends mixing in 1/8th teaspoon of salt or 1½ teaspoons of sugar per 1/4 cup of egg yolks (4 yolks) before freezing to help prevent them from becoming gelatinous. Make sure to label containers with how many eggs, whites or yolks are inside for easy use later.
Avocados
Anyone who has ever bought an avocado knows they have a very short ripeness window — making them possibly the most high-maintenance fruit around. They seem to go from too hard to eat to overripe in a day. Help them last a little longer by freezing ripe avocados to use in guacamole, smoothies or even baking. They'll maintain their heart-healthy monounsaturated fats, making them just as nutritious as fresh.
How to freeze: Peel, pit and mash the avocados, then transfer to an airtight container or freezer bag. Adding a bit of lemon juice can help prevent browning. You can also freeze slices, but they might turn mushy when thawed.
Bread
Can't ever finish a whole loaf before it goes stale? Not only does freezing bread extend its shelf life, it can also boost its nutrition by increasing resistant starch — a type of carbohydrate that acts like fiber, digests more slowly and supports better blood sugar control. Bread also thaws quickly. Just leave a slice out for a bit or pop it into the toaster for a warm, crispy bite.
How to freeze: For presliced loaves, squeeze out excess air from the bag and simply place it in the freezer. For whole loaves, slice them first so you can grab just what you need. Pro tip: Double-bag bread to help prevent freezer burn.
Grains (cooked and uncooked)
If there's one food worth batch cooking to save time, it's grains. Cooked rice, quinoa or barley freeze nicely and make meals easier, especially on busy nights. Just grab a portion of frozen cooked grains, reheat with a splash of water to prevent drying out and toss into grain bowls, stir-fries, soups or salads.
You can also freeze uncooked grains. While they generally have a long shelf life, their natural fats can go rancid over time. Freezing extends their life and helps kill any weevil (a type of insect) eggs or larvae that might be present (yes, unfortunately, this is a real thing).
How to freeze: Cool cooked grains completely before portioning them out into freezer-friendly bags or containers (I like 1-cup servings). For uncooked grains, divide them into your usual portion sizes and store them in airtight containers to protect against moisture.
Cheese
Freezing cheese is a practical way to make it last longer and keep it from drying out or growing mold before you can finish it. Hard cheeses, like cheddar or parmesan, typically freeze better than soft ones. Frozen cheese also works best in dishes where it's going to melt anyway — think pizza, quesadillas, grilled cheese, eggs or casseroles.
How to freeze: Shred or cut cheese into smaller portions before freezing. If shredding, toss the pieces with a bit of cornstarch to prevent clumping. For sliced cheese, layer wax or parchment paper between slices. Wrap everything tightly in wax paper or plastic wrap and store in a freezer-safe bag or container.
Tofu
Freezing tofu can actually improve its texture. It becomes firmer, chewier (almost meatier) and better absorbs flavor from marinades and sauces. Frozen tofu also crumbles less, making it perfect for stir-fries, soups, hot pots or even grilling. Just thaw in the fridge and it's ready to use.
How to freeze: Press tofu to remove as much liquid as you can. Then slice it into desired sizes and freeze on a parchment-lined baking sheet. Once they're solid, transfer the slices to a freezer-safe container or bag. You can also freeze the whole block — it just takes longer to thaw.
Tomato paste
Ever open a can of tomato paste because you need just a spoonful for a recipe and then wonder, What now? That's where freezing comes in: It allows you to keep the rest for your next dish and saves you from opening a new can every time. Frozen tomato paste holds its flavor well and is easy to toss into sauces, soups, stews and chilis straight from the freezer.
How to freeze: Scoop tablespoon-sized portions onto a parchment-lined baking sheet or into an ice cube tray. When frozen, transfer the dollops to an airtight container or freezer bag.
Peeled garlic
Fresh garlic lasts a while, but it can sprout or go soft before you know it. Freezing garlic helps you hold on to its flavor and saves you the hassle of peeling it later. When you're ready to cook, just grab a clove straight from the freezer — no need to thaw.
How to freeze: Peel cloves and freeze them whole or minced in an air-tight container or freezer bag. If you typically sauté your garlic, try mixing minced garlic with a little olive or avocado oil in an ice cube tray. Once the cubes are solid, pop them out and store in a sealed bag for easy use.
Bottom line
Freezing food is an easy way to cut down on waste and save time during the week. There are so many more foods you can freeze, and with a bit of trial and error, you'll find what works best for you. Just be sure to use air-tight containers or freezer bags to prevent freezer burn. And if you spot any, no big deal — just cut them off, and the rest is still good to use.
Maxine Yeung is a dietitian and board-certified health and wellness coach.
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Scientists say it may be possible to protect aging brains from Alzheimer's with an old remedy — lithium
In a major new finding almost a decade in the making, researchers at Harvard Medical School say they've found a key that may unlock many of the mysteries of Alzheimer's disease and brain aging — the humble metal lithium. Lithium is best known to medicine as a mood stabilizer given to people who have bipolar disorder and depression. It was approved by the US Food and Drug Administration in 1970, but it was used by doctors to treat mood disorders for nearly a century beforehand. Now, for the first time, researchers have shown that lithium is naturally present in the body in tiny amounts and that cells require it to function normally — much like vitamin C or iron. It also appears to play a critical role in maintaining brain health. In a series of experiments reported Wednesday in the journal Nature, researchers at Harvard and Rush universities found that depleting lithium in the diet of normal mice caused their brains to develop inflammation and changes associated with accelerated aging. 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Close examination of human and animal brain tissues, along with genetic investigations in the study, found the mechanism that appears to be at play: Beta amyloid plaques — the sticky deposits that gum up the brains of Alzheimer's patients — bind to lithium and hold it, including the type that's normally present in the body, as well as the commonly prescribed form. This binding depletes lithium available for nearby cells, including important scavengers known as microglia. When the brain is healthy and functioning normally, microglia are waste managers, clearing away beta amyloid before it can accumulate and can cause harm. In the team's experiments, microglia from the brains of lithium-deficient mice showed a reduced ability to sweep away and break down beta amyloid. Yankner believes this creates a downward spiral. The accumulation of beta amyloid soaks up more and more lithium, further crippling the brain's ability to clear it away. He and his colleagues tested different lithium compounds and found one — lithium orotate — that doesn't bind to amyloid beta. When they gave lithium orotate to mice with signs of Alzheimer's in their brains, these changes reversed: Beta amyloid plaques and tangles of tau that were choking the memory centers of the brain were reduced. Mice treated with lithium were once again able to navigate mazes and learn to identify new objects, whereas those who got placebos showed no change in their memory and thinking deficits. In its natural form, lithium is an element, a soft, silvery-white metal that readily combines with other elements to form compounds and salts. It's naturally present in the environment, including in food and water. Scientists have never fully known how it works to improve mood — only that it does. The original formula for 7Up soda included lithium — it was called 7Up Lithiated Lemon Soda — and touted as a hangover cure and mood lifter 'for hospital or home use.' Some hot springs known to contain mineral water brimming with lithium became sought out wellness destinations for their curative powers. Still, people who take prescription doses of lithium — which were much higher than the doses used in the new study — can sometimes develop thyroid or kidney toxicity. Tests of the mice given low doses of lithium orotate showed no signs of damage. That's encouraging, Yankner said, but it doesn't mean people should try to take lithium supplements on their own. 'A mouse is not a human. Nobody should take anything based just on mouse studies,' Yankner said. 'The lithium treatment data we have is in mice, and it needs to be replicated in humans. We need to find the right dose in humans,' he added. The normal amounts of lithium in our bodies, and the concentrations given to the mice, are small — about 1,000 times lower than doses given to treat bipolar disorder, Yankner notes. Yankner said he hoped toxicity trials of lithium salts would start soon. Neither he nor any of his co-authors have a financial interest in the outcome of the research, he said. The National Institutes of Health was the major funder of the study, along with grants from private foundations. 'NIH support was absolutely critical for this work,' Yankner said. The new research corroborates earlier studies hinting that lithium might be important for Alzheimer's. A large Danish study published in 2017 found people with higher levels of lithium in their drinking water were less likely to be diagnosed with dementia compared with those whose tap water contained naturally lower lithium levels. Another large study published in 2022 from the United Kingdom found that people prescribed lithium were about half as likely has those in a control group to be diagnosed with Alzheimer's, suggesting a protective effect of the drug. But lithium's use in psychiatry caused it to become type cast as therapeutic, Yankner said. No one realized it might be important to the body's normal physiology. That happened in part because the amounts of lithium that typically circulate in the body are so small, they couldn't be quantified until recently. Yankner and his team had to adapt new technology to measure it. In the first stage of the research, the scientists tested the brain tissue and blood of older patients collected by the brain bank at Rush University for trace levels of 27 metals. Some of the patients had no history of memory trouble, while others had early memory decline and pronounced Alzheimer's. While there was no change in the levels of most metals they measured, lithium was an exception. Lithium levels were consistently lower in patients with mild cognitive impairment or Alzheimer's compared to those with normal brain function. The brains of patients Alzheimer's disease also showed increased levels of zinc and decreased levels of copper, something scientists had observed before. Consistently finding lower lithium levels in the brains of people with memory loss amounted to a smoking gun, Yankner said. 'At first, frankly, we were skeptical of the result because it wasn't expected,' said Yankner. But it held up even when they checked samples from other brain banks at Massachusetts General Hospital, Duke and Washington universities. 'We wanted to know whether this drop in lithium was biologically meaningful, so we devised an experimental protocol where we could take lithium selectively out of the diet of mice and see what happens,' Yankner said. When they fed the mice a low-lithium diet, simply dropping their natural levels by 50%, their brains rapidly developed features of Alzheimer's. 'The neurons started to degenerate. The immune cells in the brain went wild in terms of increased inflammation and worse maintenance function of the neurons around them, and it looked more like an advanced Alzheimer patient,' Yankner said. The team also found the gene expression profiles of lithium-deficient mice and people who had Alzheimer's disease looked very similar. The researchers then started to look at how this drop in lithium might occur. Yankner said in the earliest stages there's a decrease in the uptake of lithium in the brain from the blood. They don't yet know exactly how or why it happens, but it's likely to be from a variety of things including reduced dietary intake, as well as genetic and environmental factors. The major source of lithium for most people is their diet. Some of the foods that have the most lithium are leafy green vegetables, nuts, legumes and some spices like turmeric and cumin. Some mineral waters are also rich sources. In other words, Yankner said, a lot of the foods that have already proven to be healthy and reduce a person's risk of dementia may be beneficial because of their lithium content. 'You know, oftentimes one finds in science that things may have an effect, and you think you know exactly why, but then subsequently turn out to be completely wrong about why,' he said.


CNN
20 minutes ago
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Scientists say it may be possible to protect aging brains from Alzheimer's with an old remedy — lithium
Chronic diseases Dementia Getting olderFacebookTweetLink Follow In a major new finding almost a decade in the making, researchers at Harvard Medical School say they've found a key that may unlock many of the mysteries of Alzheimer's disease and brain aging — the humble metal lithium. Lithium is best known to medicine as a mood stabilizer given to people who have bipolar disorder and depression. It was approved by the US Food and Drug Administration in 1970, but it was used by doctors to treat mood disorders for nearly a century beforehand. Now, for the first time, researchers have shown that lithium is naturally present in the body in tiny amounts and that cells require it to function normally — much like vitamin C or iron. It also appears to play a critical role in maintaining brain health. In a series of experiments reported Wednesday in the journal Nature, researchers at Harvard and Rush universities found that depleting lithium in the diet of normal mice caused their brains to develop inflammation and changes associated with accelerated aging. In mice that were specially bred to develop the same kinds of brain changes as humans with Alzheimer's disease, a low-lithium diet revved the buildup of sticky proteins that form plaques and tangles in the brains that are hallmarks of the disease. It also sped up memory loss. Maintaining normal lithium levels in mice as they aged, however, protected them from brain changes associated with Alzheimer's. If further research supports the findings, it could open the door to new treatments and diagnostic tests for Alzheimer's, which affects an estimated 6.7 million older adults in the United States, according to the US Centers for Disease Control and Prevention. The research provides a unifying theory that helps explain so many of the puzzle pieces scientists have been trying to fit together for decades. 'It is a potential candidate for a common mechanism leading to the multisystem degeneration of the brain that precedes dementia,' said Dr. Bruce Yankner, a professor of genetics at Harvard Medical School, who led the study. 'It will take a lot more science to determine whether this is a common pathway… or one of several pathways,' to Alzheimer's, he added. 'The data are very intriguing.' In an editorial published in Nature, Dr. Ashley Bush, a neuroscientist who directs the Melbourne Dementia Research Center at the University of Melbourne in Australia, said the researchers 'present compelling evidence that lithium does in fact have a physiological role and that normal aging might impair the regulation of lithium levels in the brain.' He was not involved in the study. Close examination of human and animal brain tissues, along with genetic investigations in the study, found the mechanism that appears to be at play: Beta amyloid plaques — the sticky deposits that gum up the brains of Alzheimer's patients — bind to lithium and hold it, including the type that's normally present in the body, as well as the commonly prescribed form. This binding depletes lithium available for nearby cells, including important scavengers known as microglia. When the brain is healthy and functioning normally, microglia are waste managers, clearing away beta amyloid before it can accumulate and can cause harm. In the team's experiments, microglia from the brains of lithium-deficient mice showed a reduced ability to sweep away and break down beta amyloid. Yankner believes this creates a downward spiral. The accumulation of beta amyloid soaks up more and more lithium, further crippling the brain's ability to clear it away. He and his colleagues tested different lithium compounds and found one — lithium orotate — that doesn't bind to amyloid beta. When they gave lithium orotate to mice with signs of Alzheimer's in their brains, these changes reversed: Beta amyloid plaques and tangles of tau that were choking the memory centers of the brain were reduced. Mice treated with lithium were once again able to navigate mazes and learn to identify new objects, whereas those who got placebos showed no change in their memory and thinking deficits. In its natural form, lithium is an element, a soft, silvery-white metal that readily combines with other elements to form compounds and salts. It's naturally present in the environment, including in food and water. Scientists have never fully known how it works to improve mood — only that it does. The original formula for 7Up soda included lithium — it was called 7Up Lithiated Lemon Soda — and touted as a hangover cure and mood lifter 'for hospital or home use.' Some hot springs known to contain mineral water brimming with lithium became sought out wellness destinations for their curative powers. Still, people who take prescription doses of lithium — which were much higher than the doses used in the new study — can sometimes develop thyroid or kidney toxicity. Tests of the mice given low doses of lithium orotate showed no signs of damage. That's encouraging, Yankner said, but it doesn't mean people should try to take lithium supplements on their own. 'A mouse is not a human. Nobody should take anything based just on mouse studies,' Yankner said. 'The lithium treatment data we have is in mice, and it needs to be replicated in humans. We need to find the right dose in humans,' he added. The normal amounts of lithium in our bodies, and the concentrations given to the mice, are small — about 1,000 times lower than doses given to treat bipolar disorder, Yankner notes. Yankner said he hoped toxicity trials of lithium salts would start soon. Neither he nor any of his co-authors have a financial interest in the outcome of the research, he said. The National Institutes of Health was the major funder of the study, along with grants from private foundations. 'NIH support was absolutely critical for this work,' Yankner said. The new research corroborates earlier studies hinting that lithium might be important for Alzheimer's. A large Danish study published in 2017 found people with higher levels of lithium in their drinking water were less likely to be diagnosed with dementia compared with those whose tap water contained naturally lower lithium levels. Another large study published in 2022 from the United Kingdom found that people prescribed lithium were about half as likely has those in a control group to be diagnosed with Alzheimer's, suggesting a protective effect of the drug. But lithium's use in psychiatry caused it to become type cast as therapeutic, Yankner said. No one realized it might be important to the body's normal physiology. That happened in part because the amounts of lithium that typically circulate in the body are so small, they couldn't be quantified until recently. Yankner and his team had to adapt new technology to measure it. In the first stage of the research, the scientists tested the brain tissue and blood of older patients collected by the brain bank at Rush University for trace levels of 27 metals. Some of the patients had no history of memory trouble, while others had early memory decline and pronounced Alzheimer's. While there was no change in the levels of most metals they measured, lithium was an exception. Lithium levels were consistently lower in patients with mild cognitive impairment or Alzheimer's compared to those with normal brain function. The brains of patients Alzheimer's disease also showed increased levels of zinc and decreased levels of copper, something scientists had observed before. Consistently finding lower lithium levels in the brains of people with memory loss amounted to a smoking gun, Yankner said. 'At first, frankly, we were skeptical of the result because it wasn't expected,' said Yankner. But it held up even when they checked samples from other brain banks at Massachusetts General Hospital, Duke and Washington universities. 'We wanted to know whether this drop in lithium was biologically meaningful, so we devised an experimental protocol where we could take lithium selectively out of the diet of mice and see what happens,' Yankner said. When they fed the mice a low-lithium diet, simply dropping their natural levels by 50%, their brains rapidly developed features of Alzheimer's. 'The neurons started to degenerate. The immune cells in the brain went wild in terms of increased inflammation and worse maintenance function of the neurons around them, and it looked more like an advanced Alzheimer patient,' Yankner said. The team also found the gene expression profiles of lithium-deficient mice and people who had Alzheimer's disease looked very similar. The researchers then started to look at how this drop in lithium might occur. Yankner said in the earliest stages there's a decrease in the uptake of lithium in the brain from the blood. They don't yet know exactly how or why it happens, but it's likely to be from a variety of things including reduced dietary intake, as well as genetic and environmental factors. The major source of lithium for most people is their diet. Some of the foods that have the most lithium are leafy green vegetables, nuts, legumes and some spices like turmeric and cumin. Some mineral waters are also rich sources. In other words, Yankner said, a lot of the foods that have already proven to be healthy and reduce a person's risk of dementia may be beneficial because of their lithium content. 'You know, oftentimes one finds in science that things may have an effect, and you think you know exactly why, but then subsequently turn out to be completely wrong about why,' he said.

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