When you buy juice, you’ll find both pasteurized and unpasteurized options. Pasteurized juice is heated to kill germs, making it safer and extending shelf life. Unpasteurized juice skips this step, preserving more natural nutrients but increasing the risk of harmful bacteria.
This explainer breaks down what pasteurization means, how it affects nutrition and safety, and who should be cautious with raw juice.
Differences Between Pasteurized and Unpasteurized Juice
Pasteurized juice is heat-treated to kill harmful bacteria, making it safer to drink, while unpasteurized juice is raw and untreated, retaining more natural enzymes and some vitamins but carrying more risk. Pasteurization involves heating juice to a specific temperature briefly, typically between 135°F and 160°F, to destroy pathogens and extend shelf life.
Pasteurization uses common methods such as high-temperature short-time (HTST), which heats juice to around 160°F for 15 to 30 seconds, or flash pasteurization, which is even quicker. This process reduces the chance of foodborne illness and slows spoilage, allowing pasteurized juice to stay fresh longer when refrigerated.
Unpasteurized juice, often labeled as raw or fresh squeezed, skips this heat treatment. It may preserve some enzymes and heat-sensitive vitamins like vitamin C better than pasteurized juice, but it can also harbor bacteria like E. coli or Salmonella. This makes unpasteurized juice riskier for young children, older adults, pregnant people, and those with weakened immune systems.
| Type of Juice | Process | Safety | Shelf Life | Nutrient Impact |
|---|---|---|---|---|
| Pasteurized | Heat treated 135–160°F briefly | Lower risk from bacteria | Longer when refrigerated | Some heat-sensitive vitamins reduced |
| Unpasteurized | No heat treatment | Higher risk of pathogens | Short, usually days refrigerated | More natural enzymes, more heat-sensitive vitamins |
Check the Label for Added Sugar and Storage Advice
Most store-bought juices are pasteurized, which is usually clearly stated on the label. Terms like “pasteurized,” “heat treated,” or “hot filled” indicate the juice has gone through this safety process. Unpasteurized juices may be labeled as “raw,” “fresh squeezed,” or simply not mention pasteurization and often carry a warning label stating they have not been pasteurized and may contain harmful bacteria.
Added sugars are common in many commercial juices, even those labeled 100% juice blends. Checking the Nutrition Facts label is key: look for sugars listed under total carbohydrates and added sugars. Consuming excess added sugar can affect blood sugar control and overall health, so choosing juices without added sugars or limiting intake to about 4 to 8 oz (half to one cup) daily is wise.
Pasteurized juice has a longer shelf life, often weeks unopened and refrigerated. Once opened, it should be consumed within 7 to 10 days. Unpasteurized juice is highly perishable and should be kept refrigerated and consumed within 2 to 3 days of opening, sometimes sooner. Always follow storage instructions on the label to keep juice safe and fresh.
Who Should Avoid Unpasteurized Juice and Why
Unpasteurized juice is not safe for certain groups due to the risk of harmful bacteria. These juices can contain pathogens like Escherichia coli, Salmonella, and Cryptosporidium that pasteurization kills by heating the juice to a set temperature briefly.
Pregnant women, young children, older adults, and people with weakened immune systems should avoid unpasteurized juice entirely. Their bodies are less able to fight infections that these bacteria cause, which can lead to serious illness.
You’ll often find a warning label on unpasteurized juices stating they are not recommended for these high-risk groups. This label is a clear sign that those vulnerable should stick to pasteurized products.
Regulatory agencies advise these groups to choose pasteurized juice because it reduces the chance of foodborne illness without compromising safety. For most other adults, unpasteurized juice carries a higher but still relatively low risk if the juice is fresh and handled properly.
How Nutrients Differ Between Pasteurized and Unpasteurized Juice
Pasteurization reduces some nutrients but preserves others, striking a balance between safety and nutrition. Vitamin C, which is sensitive to heat, typically decreases by about 10 to 30 percent during pasteurization.
Minerals like potassium and calcium remain largely unaffected because they’re stable under heat. This means pasteurized juice still provides essential minerals reliably.
Unpasteurized juice retains natural enzymes that some believe support digestion, although these enzymes don’t survive stomach acid well. These juices also have slightly higher vitamin content because they skip the heating step.
Choosing between pasteurized and unpasteurized orange juice, for example, often comes down to your priority: pasteurized offers safer consumption with a modest nutrient loss, while unpasteurized provides more natural vitamins if you are healthy and cautious about risks.
| Nutrient | Change After Pasteurization |
|---|---|
| Vitamin C | Decreases by 10-30% |
| Minerals (Potassium, Calcium) | Minimal change |
| Enzymes | Mostly destroyed |
| Other Vitamins (like B-complex) | Slight loss |
If you want to maximize vitamin C intake but have concerns about safety, consider drinking pasteurized juice immediately after opening and storing it properly to preserve nutrients.
For a deeper look at how pasteurization affects juice nutrition, you can check out our detailed guide on does pasteurization reduce juice nutrients.
How to Safely Enjoy Unpasteurized Juice at Home
You can enjoy unpasteurized juice at home safely by following careful steps to minimize bacterial risks. Start by thoroughly washing all fruits and vegetables under running water to remove dirt and surface bacteria before juicing.
Use clean, sanitized equipment for juicing to prevent contamination. Wash hands well and clean all surfaces and utensils before and after use.
Drink freshly made unpasteurized juice immediately whenever possible. If you have leftovers, refrigerate them promptly and consume within 24 hours to avoid bacterial growth.
If you want to reduce the risk further without buying pasteurized juice, you can pasteurize juice at home by heating it carefully to 160°F (71°C) for at least 6 seconds. Use a reliable kitchen thermometer and avoid boiling, which can alter flavor and nutrients.
What to Do Next: Choosing and Handling Juice Safely
Choosing between pasteurized and unpasteurized juice starts with assessing your health risks. If you are pregnant, older, immunocompromised, or serving young children, pasteurized juice is the safer choice.
Always check the label for pasteurization status and added sugar. Juice labeled pasteurized has been heat-treated to kill bacteria, while unpasteurized juice will often say “raw” or “fresh” but carries higher risk.
Store juice promptly in the refrigerator and consume it within the time suggested on the label or within 24 hours if homemade and unpasteurized. Proper storage slows bacterial growth and preserves quality.
Pasteurized juice offers convenience and longer shelf life without the safety concerns of raw juice. If you prefer unpasteurized juice for taste or nutrition, consider home pasteurization as a middle ground.
