If your blood pressure regularly falls below 90/60 mmHg and you feel dizzy, lightheaded, or fatigued, certain foods and eating strategies can help bring it up. The most effective dietary change is increasing your salt and fluid intake, but other foods and nutrients play a role too.
Salt: The Most Direct Way to Raise Blood Pressure
Sodium is the single most powerful dietary tool for raising blood pressure. When you eat more salt, your body retains more water, which expands your blood volume, increases cardiac output, and pushes pressure higher. This is exactly why people with high blood pressure are told to cut back on salt, and why it works in reverse for people with low blood pressure.
For people with chronic low blood pressure or conditions like orthostatic hypotension (feeling faint when standing), medical guidelines suggest significantly more sodium than the general population consumes. The American Society of Hypertension recommends 2,400 to 4,000 mg of sodium per day for these patients, while some specialists suggest even higher amounts, up to 4,000 to 8,000 mg of sodium daily for people with orthostatic disorders. For context, the general population guideline is about 2,000 mg per day. A common clinical approach is adding 1,000 to 2,000 mg of sodium to the diet three times daily.
Practical ways to increase salt intake:
- Salty snacks: Olives, pickles, salted nuts, pretzels, and cheese
- Broth and soup: A cup of chicken or bone broth can contain 800 to 1,000 mg of sodium
- Canned foods: Canned vegetables, beans, and fish packed in brine
- Table salt: Simply adding extra salt to meals
Fluids and Blood Volume
Dehydration is one of the most common causes of low blood pressure. When your body doesn’t have enough fluid, your blood volume drops, and so does the pressure pushing blood through your arteries. When plasma becomes more concentrated from too little water, your body activates hormonal pathways that constrict blood vessels and retain water to compensate, but this system works best when you’re actually drinking enough.
Aim for at least 6 to 8 cups of water per day (roughly 1.5 to 2 liters). Pairing water with sodium-rich foods or drinking electrolyte beverages helps your body hold onto the fluid rather than just passing it through. Sports drinks, coconut water, or water with a pinch of salt all serve this purpose.
Caffeine for a Quick Boost
Coffee, tea, and other caffeinated drinks cause a reliable short-term rise in blood pressure. A single dose of caffeine raises systolic pressure by 3 to 15 mmHg and diastolic pressure by 4 to 13 mmHg. The effect kicks in within 30 minutes, peaks at 1 to 2 hours, and can last more than 4 hours.
This makes caffeine useful as a quick fix before situations where you know your blood pressure tends to drop, like standing for long periods or after meals. A cup of coffee or strong tea before breakfast is a simple strategy many people with low blood pressure rely on. The effect is most pronounced if you don’t drink caffeine regularly, since habitual users develop some tolerance.
Licorice Root
Real licorice (not the candy flavored with anise) contains an active compound that blocks an enzyme in your kidneys responsible for deactivating cortisol. When that enzyme is blocked, cortisol floods the kidney’s mineral-regulating receptors, causing your body to hold onto sodium and excrete potassium. The result is higher blood pressure.
This effect is potent enough that the European Union’s scientific committee on food set an upper daily limit of 100 mg of the active compound, glycyrrhizin, found in roughly 50 grams of licorice. One documented case involved a patient consuming six licorice tea bags daily (600 mg of glycyrrhizin), which caused dangerously high blood pressure and low potassium. If you’re using licorice to raise blood pressure, treat it with respect. Small amounts of licorice tea or supplements can help, but exceeding the recommended limit carries real risks, especially potassium depletion.
B12-Rich Foods
Vitamin B12 deficiency can directly cause low blood pressure through two pathways. First, it leads to a type of anemia where your body produces fewer and larger red blood cells, reducing the blood’s oxygen-carrying capacity. Second, and less widely known, B12 deficiency damages the autonomic nerves that control blood vessel constriction. When those nerves don’t work properly, your body can’t tighten blood vessels in response to position changes, causing blood to pool in your legs and your pressure to drop.
Case reports have documented patients with severe hypotension from B12 deficiency who recovered completely after supplementation. Foods rich in B12 include beef liver, clams, sardines, nutritional yeast (fortified), eggs, and dairy products. If you follow a vegan or vegetarian diet, you’re at higher risk for deficiency and may need a supplement.
How You Eat Matters Too
Large meals, especially carbohydrate-heavy ones, can cause a significant blood pressure drop after eating. This happens because your body diverts blood to the digestive system, temporarily reducing pressure elsewhere. This condition, called postprandial hypotension, is particularly common in older adults.
The fix is straightforward: eat six smaller meals throughout the day instead of three large ones, and keep those meals lower in carbohydrates. A plate with protein, healthy fats, and non-starchy vegetables will keep your blood pressure more stable than a big bowl of pasta or a heavy sandwich. Drinking water before meals and having a cup of coffee or tea with food can also help offset the post-meal dip.
A Sample Day for Low Blood Pressure
Putting this together, a practical day might look like this: coffee with breakfast, which includes eggs with salt and a side of cheese. A mid-morning snack of salted nuts and a glass of water. Lunch built around protein and vegetables rather than a large sandwich or rice bowl. An afternoon cup of broth or tea. A smaller dinner with liberal seasoning, followed by a light evening snack. Throughout the day, steady water intake paired with salty foods ensures your body maintains the fluid volume it needs to keep pressure stable.
If you’re eating well, staying hydrated, and using salt liberally but still experiencing symptoms like dizziness, fainting, or persistent fatigue, the cause of your low blood pressure may be something dietary changes alone can’t fix. Underlying conditions like adrenal insufficiency, heart problems, or medication side effects all warrant investigation.