Will a smoothie go bad in the fridge overnight?

Smoothies make for a delicious and nutritious breakfast or snack. They’re quick and easy to make, packed with fruits, vegetables, protein, fiber and other nutrients. However, the question arises – if you make a big batch of smoothies and store them in the fridge, will they go bad overnight?

How long do smoothies last in the fridge?

In general, smoothies stored in an airtight container in the refrigerator should last up to 3 days. The shelf life depends on a few factors:

  • Ingredients used – Fruits and vegetables with higher water content tend to spoil faster. Leafy greens like spinach may only last 1-2 days.
  • Acidity level – Smoothes with citrus fruits or yogurt tend to last longer due to the higher acidity.
  • Additional ingredients – Things like chia seeds, nuts, nut butters, and protein powders can extend the fridge life.
  • Storage container – An airtight container prevents exposure to air and bacteria.
  • Fridge temperature – Colder temps (34-40°F) slow spoilage.

So if you store your smoothie in an airtight container and keep your fridge cold, it should be safe for consumption within 3 days.

Signs your refrigerated smoothie has gone bad

Here are some signs that indicate your smoothie may have spoiled and is no longer good to drink:

  • Change in texture – Smoothies will thicken and become clumpy as they sit. Excess separation of solids and liquids is a red flag.
  • Mold growth – Fuzzy mold spots indicate spoilage. Toss immediately if you see this.
  • Unpleasant sour smell – A very sour, rotten or fermented odor means bacteria growth.
  • Fizzing/bubbling – Bubbles or carbonation can indicate fermentation.
  • Discoloration/browning – Oxidation causes smoothies to darken over time.
  • Weird taste – An excessively sour, bitter, or “off” taste usually means it’s gone bad.

Tips to extend the fridge life of smoothies

Here are some tips to help your smoothies stay fresher for longer:

  • Wash produce well before blending – this removes bacteria.
  • Start with chilled ingredients – this slows microbial growth.
  • Keep smoothies thicker rather than watery.
  • Add lemon/lime juice for acidity.
  • Blend in yogurt or kefir for probiotics.
  • Include chia seeds or flaxmeal as a natural thickener.
  • Store in an airtight container in the back of the fridge.
  • Only refrigerate for up to 3 days maximum.
  • Don’t let smoothies sit at room temp before refrigerating.
  • Avoid contamination – use clean utensils when portioning smoothies out.

What happens if you drink a spoiled smoothie?

Drinking a smoothie that has gone bad can cause unpleasant symptoms or illness. Here’s what can happen:

  • Upset stomach – Cramping, nausea, diarrhea may occur.
  • Food poisoning – From bacterial growth like salmonella, E. coli, listeria.
  • Allergic reaction – Mold can trigger asthma attacks or rashes in sensitive people.
  • Botulism poisoning – Toxins from clostridium botulinum bacteria can cause paralysis, difficulty breathing.

If you experience concerning symptoms after drinking a spoiled smoothie, seek medical care. Food poisoning usually resolves on its own, but dehydration and botulism require prompt treatment.

Can you freeze smoothies to extend fridge life?

Freezing is an excellent way to preserve smoothies for longer storage. Frozen smoothies can typically last 2-3 months in the freezer before quality deteriorates. Here are some freezing tips:

  • Use ripe, unspoiled fruits and vegetables.
  • Wash produce thoroughly before blending.
  • Freeze in an airtight container or resealable plastic bags.
  • Lay bags flat in freezer to prevent texture changes.
  • Leave 1/2 inch room for expansion.
  • Label with contents and date.
  • Avoid freezing for longer than 2-3 months.
  • Thaw overnight in fridge before consuming.

Freezing smoothies is ideal for making large batches to enjoy later. The cold temperature stops any bacterial growth and slows oxidation. Just be sure to store in an airtight container to prevent freezer burn.

Should you refrigerate smoothie ingredients?

Proper storage of smoothie ingredients is key for food safety. Here are some fridge and freezer recommendations:

Ingredient Fridge Freezer
Leafy greens (spinach, kale) 3-5 days 6 months
Berries (strawberries, blueberries) 3-6 days 8-12 months
Tropical Fruit (pineapple, mango) 5-7 days 6-12 months
Bananas Store at room temp until ripe. Once ripe, store in fridge. 6 months (when ripe)
Avocados Store at room temp until ripe. Once ripe, up to 5 days in fridge. Not recommended
Yogurt 7-10 days past sell-by date 1-2 months
Nuts, seeds, nut butters 6-12 months in airtight container 1 year

Storing smoothie ingredients properly prevents premature spoilage. Wash produce, don’t overfill fridge, and follow any use-by dates on packaged items.

What to do if you drank a bad smoothie?

If you accidentally drank a smoothie that tasted off or made you feel sick, follow these steps:

  1. Drink lots of water – This helps flush out any toxins and prevent dehydration from vomiting/diarrhea.
  2. Watch for concerning symptoms – Including vomiting, bloody stool, diarrhea lasting over 24 hours, fever higher than 101°F.
  3. Call your doctor – Seek medical advice, especially if symptoms are severe or persist longer than 24-48 hours.
  4. Discard smoothie – Throw out any remaining smoothie so no one else gets sick.
  5. Wash containers/appliances – Clean blender, glasses, utensils that touched the smoothie with hot soapy water.
  6. Get rest – Food poisoning can be draining, so take it easy while your body recovers.
  7. Stick to bland foods – Give your stomach a break with BRAT diet foods like rice, applesauce, toast, bananas.

Most cases of food poisoning from smoothies resolve on their own within 24-48 hours. But call your doctor right away if you have worrying symptoms or are at higher risk for complications.


In summary, smoothies stored in the refrigerator should generally last about 3 days before going bad. Signs of spoilage include changes in texture, smell, taste, and appearance. To extend fridge life, store smoothies in an airtight container, add acidic ingredients like citrus and yogurt, and keep fridge temps cold. Freezing smoothies can preserve them for 2-3 months. Always store smoothie ingredients like produce and leafy greens properly. If you accidentally drink a bad smoothie, drink fluids, watch for concerning symptoms, and discard any leftover smoothie so others don’t get sick. Be mindful of food safety when preparing and storing smoothies, and you can safely enjoy these nutritious beverages.

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