Tomatoes and Blood Pressure: What the Evidence Shows

Tomatoes and Blood Pressure: What the Science Says

Quick Answer: Tomatoes may help support healthy blood pressure as part of a balanced diet, but they are not a treatment. In an observational analysis of 7,056 older adults at high cardiovascular risk in Spain’s PREDIMED trial, people without hypertension who ate more than 110 grammes of tomatoes a day (roughly one medium tomato) had a 36% lower risk of developing hypertension than those eating less than 44 grammes. This shows a link, not proof of cause. Lycopene (a carotenoid antioxidant) and potassium are thought to play a role, and cooking tomatoes with a little oil makes lycopene easier to absorb. If you take blood pressure medication, keep taking it as prescribed and follow your doctor’s advice.

What You’ll Learn:

• How lycopene may affect blood pressure (proposed mechanisms)
• How much tomato was linked with benefit in studies (about 110 grammes a day)
• Fresh vs. cooked: which form delivers better outcomes
• Best tomato varieties for cardiovascular health
• What the evidence shows (including PREDIMED study findings)

Cardiovascular diseases are the leading cause of death worldwide, and high blood pressure is one of their main risk factors. Research involving 7,056 older adults found that higher tomato consumption was linked with slightly lower diastolic blood pressure and a lower risk of developing hypertension. It is peer-reviewed evidence, but it is observational, so it shows an association rather than proof that tomatoes cause the effect.

https://www.youtube.com/watch?v=PUJUhtnqTUE

Whether you’re cultivating Solanum lycopersicum varieties in your own garden or selecting produce at the greengrocer, understanding which forms—fresh versus processed—deliver the most absorbable lycopene helps you get more from this common fruit.

What Is Lycopene and Why Does It Lower Blood Pressure?

Definition: Lycopene is a fat-soluble carotenoid antioxidant (chemical formula C₄₀H₅₆) found in red-pigmented fruits and vegetables, with tomatoes and tomato products being the main dietary source (about 2.6 mg per 100g in raw tomatoes and about 29 mg per 100g in tomato paste, according to USDA data).

How Lycopene May Work: Three Proposed Mechanisms

1. ACE Inhibition (Angiotensin-Converting Enzyme Suppression)

• Laboratory and animal studies suggest lycopene may reduce ACE enzyme activity
• That would reduce angiotensin II production (the hormone that narrows blood vessels)
• This has not been shown to match the effect of ACE-inhibitor medicines in people

2. Nitric Oxide Production

• May support endothelial nitric oxide synthase (eNOS), mainly in lab studies
• Could improve nitric oxide availability
• Nitric oxide helps arteries relax and blood flow freely

3. LDL Oxidation Prevention

• May reduce oxidative stress in cholesterol particles
• Less LDL oxidation is thought to slow plaque formation (not proven in people)
• Tomato interventions lowered LDL cholesterol by about 0.22 mmol/L on average in a 2017 meta-analysis of intervention trials

Clinical Evidence: A 2024 observational analysis of the PREDIMED trial (7,056 older adults, led by researchers in Barcelona) found that people without hypertension who ate more than 110 grammes of tomatoes a day had a 36% lower risk of developing hypertension than those eating less than 44 grammes. Intermediate intake (44-82 g a day) was linked with about 0.65 mmHg lower diastolic pressure. These are small, population-level differences and do not replace blood pressure medication.

How Much Tomato Do You Need to Lower Blood Pressure?

What the PREDIMED analysis reported by intake (observational, not a dosing trial):

Practical Translation:

• 1 medium tomato (about 123g) = roughly the intake of the highest-intake group
• ½ cup tomato sauce (120g) = similar weight, with more absorbable lycopene
• 2 tablespoons tomato paste (30g) = concentrated source (about 9 mg lycopene, based on USDA data)

Tip: Eat tomatoes with some dietary fat (olive oil, avocado, nuts). Lycopene is fat-soluble, and in one small study adding avocado to salsa increased lycopene absorption about 4.4-fold (Unlu et al., Journal of Nutrition, 2005).

Fresh vs. Cooked Tomatoes: Which Is Better for Blood Pressure?

Short Answer: Cooked tomatoes provide more absorbable lycopene than raw ones, but no study has shown that cooked tomatoes lower blood pressure more than raw tomatoes.

The Processing Paradox

Raw Tomatoes:

• Lycopene mostly in the all-trans form, which is absorbed less readily
• Vitamin C (about 14 mg per 100g raw, USDA), some of which is lost with long cooking
• Intact cell walls limit carotenoid release
• Best use: Vitamin C intake, fresh eating

Cooked Tomatoes (especially cooked with a little oil):

• Some lycopene converts to cis-isomers, which are absorbed more readily
• Heat disrupts cell wall matrices, releasing bound lycopene
• Concentration effect (water evaporation increases density)
• Best use: Getting more absorbable lycopene

Lycopene Content by Processing Method

Bottom line: Concentrated products such as tomato paste supply far more lycopene per gram than fresh raw tomatoes (about 29 mg vs. 2.6 mg per 100g, USDA), and cooking makes it easier to absorb.

Best Tomato Varieties for Cardiovascular Health

Not all cultivars deliver equal lycopene content. Lycopene content varies with variety, ripeness, and growing conditions; deep-red, fully ripe fruit generally contains more. The figures below are not variety-specific lab values.

Lycopene by Cultivar Type

Good Choices for Cooking Down into Sauce:

1. San Marzano – Classic paste tomato for sauces
2. Roma – Widely available, consistent quality
3. Amish Paste – Meaty heirloom paste tomato

Step-by-Step: How to Prepare Tomatoes for Maximum Blood Pressure Benefits

Method 1: Slow-Roasted Tomato Concentrate

Ingredients:

• 1kg Roma or San Marzano tomatoes
• 30ml extra virgin olive oil
• 3 garlic cloves
• Fresh basil

Instructions:

1. Halve tomatoes lengthwise, remove seeds
2. Arrange cut-side up on baking tray
3. Drizzle with olive oil, add garlic
4. Roast at 160°C for 90-120 minutes (low and slow)
5. Blend until smooth with basil

Result: A concentrated sauce; cooking tomatoes down raises the lycopene in each spoonful

Method 2: Pressure-Cooked Tomato Sauce

Why pressure cooking: A quick, high-heat way to make a thick sauce; heat helps release lycopene from the tomato cells.

Instructions:

1. Combine 1kg tinned San Marzano tomatoes with aromatics
2. Pressure cook at high pressure for 15 minutes
3. Natural pressure release (10 minutes)
4. Blend or leave chunky as preferred

Result: A basic sauce; its lycopene and potassium content depends on the tomatoes used

Method 3: Raw Tomato + Healthy Fat Pairing

The Mediterranean Formula:

• 200g cherry tomatoes, halved
• ½ ripe avocado (provides 10g monounsaturated fat)
• 30ml olive oil dressing
• Rocket (arugula) for additional nitrates

Why it works: In a small study, adding avocado to salsa increased lycopene absorption about 4.4-fold, because lycopene is fat-soluble.

How to Select Quality Tomatoes: Visual Indicators

5-Point Quality Assessment:

1. Colour Saturation

• Deep, even red = usually more lycopene
• Pale pink/orange = usually less lycopene
• Uniform colour distribution indicates vine ripening

2. Firmness Test

• Slight give when pressed (indicates ripeness)
• Avoid mushy texture (cell wall breakdown, nutrient loss)
• Rock-hard = picked unripe (lycopene develops on plant)

3. Aromatic Profile

• Sweet, grassy scent at stem = usually ripe, flavourful fruit
• No smell = often picked early
• Fermented odour = overripe, avoid

4. Seasonal Timing

• UK glasshouse tomatoes (May-October): often picked riper
• Winter imports: often harvested less ripe
• Local vine-ripened fruit usually tastes best

5. Storage Temperature

• Avoid refrigerating unripe tomatoes (cold stops ripening and dulls flavour)
• Store at 18-20°C for 5-7 days maximum
• Refrigeration acceptable only after cutting

Processed Tomato Products: Sodium Warning

Critical Selection Criteria:

Label Reading Rule: Select products with “tomatoes” as the sole ingredient. Additives to avoid:

• Added sodium (>50 mg/100g)
• Added sugar/glucose-fructose syrup
• Calcium chloride (firming agent—harmless but unnecessary)

The Clinical Evidence: PREDIMED Trial Findings

Study Design

• Participants: 7,056 adults (aged 55-80) with cardiovascular risk factors
• Duration: 3-year longitudinal analysis
• Location: Spain (research led from Barcelona; published in the European Journal of Preventive Cardiology, 2024)
• Methodology: Observational analysis of PREDIMED trial data; tomato intake estimated from food questionnaires

Key Findings

Main Findings:

• 36% lower risk of developing hypertension with >110 g/day vs. <44 g/day (people without hypertension at the start; hazard ratio 0.64)
• About 0.65 mmHg lower diastolic blood pressure with intermediate intake (44-82 g/day) vs. the lowest intake
• Study type: observational, so it shows a link, not proof that tomatoes caused the difference

Dose-Response Relationship:

Other Points:

• Associations with lower blood pressure were clearest in people with grade 1 (mild) hypertension
• Tomato intake included tomato-based products as well as fresh tomatoes
• Diet was self-reported, and the results still need confirming in randomised trials

Supporting Meta-Analysis

Meta-Analysis (Cheng et al., Atherosclerosis, 2017): 21 intervention trials of tomato products or lycopene supplements

• Systolic BP: lycopene supplements lowered systolic blood pressure by about 5.7 mmHg
• Tomato products: lowered LDL cholesterol (about 0.22 mmol/L) and improved flow-mediated dilation, a measure of blood vessel function
• Other outcomes: no other significant effects were found, and trials were mostly small and short

Important Context: In a small 8-week randomised trial in people with hypertension, a tomato nutrient complex providing 15 or 30 mg of lycopene lowered systolic blood pressure, while synthetic lycopene alone did not, suggesting other tomato compounds may matter too (Wolak et al., Nutrients, 2019). Lycopene supplements are not approved by the FDA before they are sold and, like other supplements, may interact with medicines, so ask your doctor before taking them.

Complete nutrient analysis

Building a Potassium-Rich, Low-Sodium Diet Framework

The Sodium-Potassium Balance Equation:

Common targets: potassium 3,500-5,000 mg a day, ideally from food (2017 ACC/AHA blood pressure guideline), and sodium ideally <1,500 mg a day (American Heart Association). Important: if you have kidney disease or take medicines that can raise potassium (such as ACE inhibitors, ARBs, or potassium-sparing diuretics), ask your doctor before increasing potassium-rich foods.

High-Potassium Foods to Pair with Tomatoes

Daily Sample Menu (4,200 mg Potassium):

• Breakfast: Spinach omelette (400 mg) + banana (420 mg)
• Lunch: White bean + tomato salad (800 mg)
• Dinner: Baked sweet potato (540 mg) + tomato sauce pasta (450 mg)
• Snacks: Avocado toast (485 mg), cherry tomatoes (180 mg)

Sodium Restriction Strategies

Replace table salt with:

• Fresh basil, oregano, thyme (negligible sodium)
• Lemon juice, balsamic vinegar
• Garlic, onion powder (not garlic salt)
• Black pepper, smoked paprika

Processed foods to limit:

• Tinned soups (often several hundred mg sodium per serving)
• Processed meats (600-1,000 mg per 100g)
• Commercial sauces (300-600 mg per serving)
• Restaurant meals (often high in sodium)

Complementary Foods: The Mediterranean Synergy Effect

A Mediterranean-style pattern combines:

1. Tomatoes (lycopene + potassium)

• Part of an overall heart-healthy eating pattern
• More than 110g a day was the highest-intake group in the PREDIMED analysis

2. Extra Virgin Olive Oil (polyphenols)

• Oleocanthal (anti-inflammatory)
• Hydroxytyrosol (antioxidant)
• Its fat helps the body absorb lycopene

3. Leafy Greens (dietary nitrates)

• Nitrate → nitric oxide conversion
• May complement tomatoes in a vegetable-rich diet
• Include leafy greens such as spinach or rocket most days

4. Fatty Fish (omega-3)

• EPA + DHA support heart health
• At least 2 servings weekly (American Heart Association)
• Pair with tomato-based sauces

5. Nuts (arginine, magnesium)

• Arginine substrate for NO synthesis
• Magnesium cofactor for vascular function
• 30g daily (almonds, walnuts)

Clinical Outcome: In the PREDIMED trial (n=7,447), a Mediterranean diet supplemented with extra virgin olive oil or nuts was linked with about 30% fewer major cardiovascular events than a reduced-fat control diet. That result reflects the whole diet, not tomatoes alone.

Complete dietary guidelines

When Tomatoes Can’t Replace Medication

Medical Context Chart:

Critical Limitations:

• Evidence suggests tomatoes may help most as part of the diet for people with normal to mildly raised blood pressure
• Stage 2 hypertension usually needs prescribed medication; your doctor decides which
• Any blood pressure effect linked to tomatoes is small and cannot replace treatment

When to use tomatoes: ✓ As part of a heart-healthy diet
✓ Alongside prescribed medication, not instead of it
✓ Healthy eating for elevated blood pressure, following your doctor’s advice

When NOT to rely on tomatoes alone: ✗ Stage 2 hypertension (≥140/90 mmHg)
✗ Acute hypertensive episodes
✗ Replacing prescribed medication without medical supervision

Medical Guidance: If you take blood pressure medication, keep taking it exactly as prescribed and follow your doctor’s advice; do not stop or change the dose because you are eating more tomatoes. If you have kidney disease or take medicines that raise potassium, ask your GP before significantly increasing potassium-rich foods. Check your blood pressure as often as your doctor recommends.

Practical Checklist

✓ Everyday Intake:

• [ ] Include tomatoes most days (more than 110 grammes, about one medium tomato, was the highest-intake group in PREDIMED)
• [ ] Eat with some dietary fat (olive oil, avocado, nuts)
• [ ] Include cooked/processed forms (tinned, paste, sauce) for more absorbable lycopene

✓ Variety Selection:

• [ ] Choose paste varieties: San Marzano, Roma, Amish Paste
• [ ] Choose deep red, fully ripe fruit
• [ ] Buy in-season local tomatoes (May-October in UK)

✓ Preparation Methods:

• [ ] Slow-roast at 160°C for 90+ minutes (concentrates lycopene)
• [ ] Pressure-cook tinned tomatoes for a quick sauce
• [ ] Pair raw tomatoes with healthy fats (improves lycopene absorption)

✓ Processed Product Selection:

• [ ] Buy “no salt added” tinned tomatoes (<15 mg sodium/100g)
• [ ] Use plain tomato paste (about 29 mg lycopene/100g, USDA)
• [ ] Avoid commercial sauces (>300 mg sodium/100g)

✓ Dietary Integration:

• [ ] Aim for 3,500-5,000 mg potassium daily from food (beans, spinach, bananas), unless your doctor has told you to limit potassium
• [ ] Aim for less than 1,500 mg sodium daily (cut back on processed foods)
• [ ] Follow Mediterranean pattern (olive oil, leafy greens, fatty fish)

✓ Medical Monitoring:

• [ ] Check blood pressure as often as your doctor advises
• [ ] Maintain prescribed medications (don’t self-adjust)
• [ ] Consult GP before dietary substitution for drugs

What to Expect:

• No set timeline: studies have not established how quickly, or whether, tomatoes change an individual’s blood pressure
• Small changes: in the PREDIMED analysis, blood pressure differences linked to tomato intake were under 1 mmHg
• Track readings: a home monitor shows how your blood pressure responds to your overall diet and treatment
• Review regularly: share your readings with your doctor

Additional cardiovascular strategies

Source Links

• Effects of tomato-derived nutrients on cardiovascular health
• Can eating more tomatoes daily help lower high blood pressure?
• Eating a tomato a day reduces the risk of high blood pressure
• Heart-healthy foods comprehensive guide
• 10 easy things you can do to lower your blood pressure