If your oxygen saturation tends to run on the lower side, there are several natural ways to support healthier oxygen levels.

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For most people, the goal is not necessarily to push SpO2 higher and higher. Instead, it is to improve the underlying factors that affect breathing, lung function, circulation, posture, sleep, and overall fitness.

Practice Better Breathing Habits

Many people unknowingly breathe too shallowly or too rapidly.

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Shallow chest breathing can reduce oxygen efficiency and keep the body in a more stressed state.

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Try practicing diaphragmatic breathing, which means breathing deeply into the belly rather than taking quick shallow breaths into the chest.

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Slow nasal breathing may also help improve oxygen exchange and support a calmer nervous system.

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One simple technique is to inhale slowly through the nose for about four seconds, then exhale for six seconds. Longer exhales can help stimulate the parasympathetic nervous system and encourage a slower breathing pattern.

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James Nestor's book Breath also highlights the importance of nasal breathing over mouth breathing. Breathing through the nose helps warm, humidify, and filter the air while also increasing nitric oxide production, which may help blood vessels dilate and improve oxygen delivery.

Consider Mouth Taping Carefully

Some people find that gently taping the mouth shut at night encourages nasal breathing and reduces mouth breathing during sleep.

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Mouth taping has become popular because mouth breathing may worsen snoring, dry mouth, poor sleep, and overnight oxygen dips in some people.

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However, mouth taping is not appropriate for everyone. If you have significant nasal congestion, sleep apnea, obesity, or trouble breathing through your nose, mouth taping may make sleep worse.

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It is best to think of mouth taping as a possible tool for mild mouth breathing, not a replacement for getting evaluated for sleep apnea or nasal obstruction.

Exercise Regularly

Regular movement improves lung function, circulation, cardiovascular fitness, and the body's ability to deliver oxygen efficiently.

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Walking, cycling, swimming, hiking, and interval training can all help improve oxygen utilization over time.

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Aerobic exercise is especially helpful because it strengthens both the heart and lungs.

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Even light movement can help if you have been sedentary.

Improve Your Posture

Poor posture can compress the lungs and make it harder to take full breaths.

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Slouching forward, sitting for long periods, and spending too much time hunched over a screen can reduce breathing efficiency.

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Standing tall, stretching the chest, strengthening the upper back, and opening up the rib cage can all help support deeper breathing.

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Yoga, mobility work, and thoracic spine exercises may be particularly helpful.

Spend Time Outdoors

Fresh air, walking outdoors, and spending time in nature can all encourage better breathing patterns.

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In addition, exercise outdoors may improve oxygen delivery more than sitting indoors all day.

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Air quality matters too. Poor indoor air quality, smoke exposure, mold, and pollution can all make breathing less efficient.

Address Nasal Congestion

If you constantly breathe through your mouth because of allergies, congestion, or sinus issues, your oxygen efficiency may be lower.

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Addressing nasal congestion can help improve airflow and oxygenation.

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Helpful strategies may include:

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• Saline nasal rinses
• Humidifiers
• Managing allergies
• Sleeping with your head slightly elevated
• Nasal strips
• Avoiding sleeping completely flat if congestion is worse at night

Prioritize Sleep

Because oxygen levels can drop during sleep, getting enough quality sleep is important.

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If you snore, wake up tired, gasp during sleep, or notice low overnight oxygen readings, it may be worth getting evaluated for sleep apnea.

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Treating sleep apnea can make a major difference in oxygen levels, energy, heart health, and longevity.

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Sleeping on your side rather than your back may also help reduce snoring and improve airflow for some people.

Nutrients to Focus On For Better Oxygenation

Iron

Iron is needed to make hemoglobin, the protein in red blood cells that carries oxygen.

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If you are iron deficient or anemic, oxygen delivery may suffer.

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Iron is one of the most important nutrients for oxygen transport because it helps your red blood cells carry oxygen throughout the body.

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Foods rich in iron include:

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• Red meat
• Sardines
• Oysters
• Mussels
• Dark turkey meat
• Lentils
• Beans
• Pumpkin seeds
• Spinach
• Tofu

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There are two forms of iron:

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• Heme iron, which is found in animal foods and is more easily absorbed
• Non-heme iron, which is found in plant foods and is less easily absorbed

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To improve iron absorption:

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• Pair iron-rich foods with vitamin C-rich foods like citrus, strawberries, kiwi, bell peppers, tomatoes, or broccoli
• Cook acidic foods in cast iron pans
• Avoid drinking tea or coffee with iron-rich meals because they can reduce absorption
• Avoid taking large amounts of calcium at the same time as iron because calcium can interfere with absorption

Vitamin B12

Vitamin B12 helps your body make healthy red blood cells.

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Low B12 levels can contribute to certain types of anemia and fatigue.

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Foods rich in vitamin B12 include:

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• Beef
• Liver
• Salmon
• Sardines
• Tuna
• Eggs
• Dairy products
• Shellfish

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To improve B12 absorption:

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• Eat enough stomach acid-supporting foods and protein
• Avoid unnecessary long-term use of acid-blocking medications if possible, since they can reduce B12 absorption
• Older adults and people on plant-based diets may benefit from a supplement because B12 absorption tends to decline with age

Folate

Folate helps produce healthy red blood cells and works together with vitamin B12.

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Foods rich in folate include:

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• Dark leafy greens
• Lentils
• Beans
• Avocados
• Asparagus
• Broccoli
• Beets
• Citrus fruits

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To maximize folate intake:

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• Eat some folate-rich vegetables raw or lightly cooked, since prolonged cooking can reduce folate content
• Pair folate-rich foods with adequate B12 intake, since the two nutrients work together

Copper

Copper helps your body use iron properly and supports red blood cell formation.

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Without enough copper, iron cannot be efficiently incorporated into hemoglobin.

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Foods rich in copper include:

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• Oysters
• Liver
• Cashews
• Sesame seeds
• Sunflower seeds
• Dark chocolate
• Mushrooms
• Lentils

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To support copper balance:

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• Avoid taking very high-dose zinc supplements unless advised by your doctor, since too much zinc can interfere with copper absorption

Protein

Protein provides the amino acids needed to build hemoglobin and red blood cells.

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Low protein intake can make it harder for the body to repair tissues, build muscle, and maintain healthy oxygen transport.

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Foods rich in protein include:

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• Beef
• Poultry
• Fish
• Eggs
• Greek yogurt
• Cottage cheese
• Lentils
• Beans
• Tofu
• Tempeh

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To maximize protein intake:

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• Spread protein throughout the day rather than eating most of it at one meal
• Aim to include protein with every meal to better support muscle, recovery, and red blood cell production

Avoid Smoking and Secondhand Smoke

Smoking reduces oxygen delivery throughout the body.

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It damages the lungs, increases inflammation, and reduces the blood's ability to carry oxygen efficiently.

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Secondhand smoke can also impair lung function.

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Quitting smoking is one of the best things you can do for oxygen levels and long-term health.

Healthy oxygen levels are not just about the lungs

Rather, they reflect how well your respiratory system, heart, circulation, posture, sleep, and metabolism are working together.

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Simple habits like regular exercise, better posture, nasal breathing, addressing congestion, eating enough iron-rich foods, sleeping on your side, and avoiding smoking can all help support healthier SpO2 naturally over time.