Your immune system doesn’t need gummies. It needs these 6 things.

The short answer: The best immune support for fall is not in a gummy jar. Instead, it comes from sleep, protein, colorful produce, enough vitamin D, clean hands and regular movement. These basics may help your body do what it already knows how to do.

It’s the first cold snap. Someone at work is coughing, the kids brought something home, and the store has a whole wall of immune gummies by the register. So you grab a $20 bottle, just in case. We’ve all done it. However, real immune support for fall looks a lot less exciting, and it costs a lot less, too.

Here’s the truth: you can’t “boost” your immune system with one product. Your immune system is a whole network of cells and organs, and it runs on the same things the rest of your body needs. So let’s skip the hype and look at the six habits with the best research behind them.

What does immune support for fall actually look like?

Here are the six things your immune system may actually ask for this season:

• Sleep: seven or more hours most nights
• Protein: a solid serving at every meal
• Produce: a mix of colors every day
• Vitamin D: enough of it, checked with your doctor
• Clean hands: soap, water, 20 seconds
• Movement and calm: daily walks and real breaks from stress

According to Harvard’s Nutrition Source, a balanced diet plus healthy habits like good sleep and less stress is the best way to support normal immune function. No single food or supplement can do that job alone.

1. Sleep is the habit that does the most

If you only change one thing, make it bedtime. In one well-known study, researchers gave 164 healthy adults a cold virus through nose drops. Those who slept less than six hours a night the week before were 4.2 times more likely to catch the cold than those who slept seven or more.

That is one small study, so it is not the final word. Still, it points the same way as a lot of other research. Short sleep and a run-down body tend to go together. So protect your sleep like an appointment. Dim the lights an hour before bed, put your phone across the room, and keep the room cool.

2 and 3. Protein and colorful produce at every meal

Your body builds immune cells and antibodies from protein. That is why a toast-only breakfast or a salad with no protein can leave you short. Aim for a palm-size portion at each meal: eggs, Greek yogurt, chicken, fish, beans or lentils. For easy ideas, see our guide to how much protein you need.

Next, add color. Fruits and vegetables bring vitamin C, vitamin A, folate and fiber. Plus, fiber feeds the gut bacteria that work closely with your immune system. Fall makes this easy, too:

• Vitamin C: red bell peppers, broccoli, oranges, kiwi, Brussels sprouts
• Vitamin A: sweet potatoes, butternut squash, carrots, pumpkin, kale
• Zinc: pumpkin seeds, beans, lentils, eggs, beef
• Warm and easy: a pot of turmeric ginger red lentil soup covers protein, color and fiber in one bowl

4. Vitamin D: ask before you add it

Your skin makes vitamin D from sunlight. In the fall and winter, days get shorter, and many of us spend them indoors. As a result, vitamin D levels can dip.

Vitamin D plays a role in immune function, and the recommended amount for most adults is 600 IU a day. Food sources include wild salmon, sardines, egg yolks and fortified milk. However, more is not always better. Very high doses can cause problems, so talk to your doctor before you start a supplement. A simple blood test can tell you where you stand.

5 and 6. Wash your hands, then go for a walk

Hand washing is not glamorous, but it works. The CDC reports that regular hand washing may cut colds and other respiratory illnesses by about 16 to 21% in the general public. So scrub with soap for 20 seconds, especially before you eat and after you get home.

Then move your body. Regular, moderate activity like a brisk 30-minute walk is linked with healthier immune function. On cold nights, try our 20-minute indoor workout instead. Also, movement is one of the best ways to take the edge off stress. Long-term stress may wear down your defenses, so a walk, a few slow breaths or a quiet cup of tea all count as immune support for fall.

Elderberry gummies and mega-dose vitamin C: the hype

Now for the wall of gummies. Elderberry is the star of that shelf. Some early studies suggest it may ease cold or flu symptoms. However, the studies are small, the results are mixed, and the NIH says there is not enough research to know if it truly helps. Many gummies also add sugar.

Mega-dose vitamin C is a similar story. A large Cochrane review found that taking vitamin C every day did not lower how often most adults caught colds. For regular takers, colds were only about 8% shorter. Meanwhile, half a cup of chopped red bell pepper already gives you more vitamin C than most women need in a day.

So instead of spending $20 on gummies, spend it on peppers, citrus, eggs and a bag of lentils. That’s real immune support for fall you can actually eat.

Putting it together on a busy fall day

This doesn’t need a new routine. Instead, tuck the six habits into the day you already have. Here is what that can look like:

• Morning: eggs or Greek yogurt with fruit, plus 10 minutes of daylight on the porch or a short walk. Need ideas? Try one of these high-protein breakfasts.
• Midday: a warm bowl of Greek lemon chickpea soup with a side of sliced peppers, and a real hand wash before you eat.
• Afternoon: water, a handful of pumpkin seeds, and a five-minute stretch away from the screen.
• Evening: a plate that is half vegetables, a palm of protein, then lights low and phone away by 9:30.

None of it is perfect, and it doesn’t have to be. Small habits you repeat most days may matter far more than one big push in January.

Frequently asked questions

Save this for the next time the gummy wall calls your name, and send it to the friend who is already sniffling.

This article is for general information and is not medical or nutrition advice.