NutriDex

The Supplement Research Compendium
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Pistachio

Pistacia vera

A green tree nut with trial-backed LDL-lowering and modest glycemic effects

Moderate evidence 🥜Nuts🫀Heart & Metabolic⏳Longevity

✚ Updated · How we grade evidence

Evidence tier
Moderate
Research weight
Citations
10 verified / 10
Classification
Nuts
❝
What the evidence says. Several controlled trials; effects real but modest or context-dependent.

Nutrition per serving 1 oz (28 g, ~49 kernels)

28gSERVING
  • Sugars 2.1 g8%
  • Fibre 3 g11%
  • Other carbs 2.5 g9%
  • Protein 5.6 g20%
  • Fat 12.7 g45%
  • Other 2.1 g8%
What's in one serving, by weight — average composition (USDA).
Fiber11%Protein11%Vitamin E5%Magnesium8%Copper40%Manganese15%Zinc6%Selenium4%
One serving as % of the adult daily requirement (FDA Daily Values). The bold outer ring = 100% of a day's needs.
157 kcal5.6 g protein3 g fiber13 g fat
NutrientPer serving% daily value
Fiber3 g11%
Protein5.6 g11%
Vitamin E0.8 mg5%
Magnesium34 mg8%
Copper0.36 mg40%
Manganese0.34 mg15%
Zinc0.62 mg6%
Selenium2 µg4%
Phosphorus137 mg11%
Potassium287 mg6%
Iron1.1 mg6%
Calcium29 mg2%
Folate14 µg4%

Composition data: USDA FoodData Central ↗

What is Pistachio?

Pistachio (Pistacia vera) is a nut or seed used for lowers ldl ('bad') and total cholesterol modestly in controlled trials. NutriDex grades the human evidence as Moderate. Pistachios have moderate human evidence for heart-related benefits, mostly from short-term randomized controlled trials (RCTs) on blood lipids. A 2023 meta-analysis of RCTs (Critical Reviews in Food Science and Nutrition) found pistachio consumption lowered total cholesterol, LDL cholesterol and triglycerides, with no change in HDL. For blood sugar, a 2022 meta-analysis of RCTs in the British Journal of Nutrition found modest reductions in fasting glucose and insulin resistance (HOMA-IR) but no clear effect on HbA1c, so glycemic benefits are real but limited. Evidence for hard outcomes (heart attacks, death) comes from observational cohorts and nut trials such as PREDIMED, where higher nut intake tracked with lower cardiovascular and all-cause mortality; these were not pistachio-specific. Trials consistently show pistachios do not cause weight gain when swapped for other snacks. Overall, pistachios are a heart-healthy nut with proven surrogate-marker effects but limited pistachio-specific outcome data.

Purported Benefits

✓Lowers LDL ('bad') and total cholesterol modestly in controlled trials
✓Reduces triglycerides without lowering HDL cholesterol
✓May modestly improve fasting blood glucose and insulin resistance in prediabetes/type-2 diabetes
✓Does not promote weight gain despite calorie density when eaten in place of other snacks
✓Provides plant protein, fiber and unsaturated fats supporting heart health
✓Part of nut-rich dietary patterns linked to lower cardiovascular and all-cause mortality in cohorts

Dosing & Compounds

Typical Dose
1-2 oz (~28-56 g, a small-to-medium handful) of unsalted pistachios per day, ideally replacing less healthy snacks
Active Compounds
Monounsaturated fatty acids (MUFA)Polyunsaturated fatty acids (PUFA)Dietary fiberPlant proteinPotassiumMagnesiumVitamin B6PhytosterolsLutein/zeaxanthin and polyphenol antioxidants

Safety & Cautions

Pistachios are a tree nut and can cause IgE-mediated allergic reactions including life-threatening anaphylaxis in sensitized people; anyone with tree-nut or peanut allergy should avoid them. They are calorie-dense (~160 kcal per oz), so portion control matters and salted/honey-roasted versions add sodium and sugar. Whole nuts are a choking hazard for children under about 4 years. Like other nuts, pistachios can rarely carry aflatoxin if improperly stored, so buy fresh and discard moldy or off-smelling nuts. Educational only — always check with your doctor or pharmacist before combining Pistachio with any medicine.

Key Studies ★ 10 studies

Meta-analysis Ghanavati 2023 (Mohammadi-Sartang) meta-analysis ✓ PubMed
Pooled RCTs found pistachio consumption significantly reduced total cholesterol, LDL cholesterol and triglycerides, with no effect on HDL cholesterol.
Meta-analysis Nadi 2022 meta-analysis ✓ PubMed
Meta-analysis of RCTs showed pistachios modestly lowered fasting blood glucose and HOMA-IR insulin resistance, but did not significantly change HbA1c or fasting insulin.
meta-analysis Asbaghi et al. 2021 ✓ Source
Meta-analysis of 13 RCTs (563 participants): pistachio consumption significantly reduced systolic blood pressure (MD -2.12 mmHg, 95% CI -3.65 to -0.59, P=0.007), with a non-significant effect on flow-mediated dilation (endothelial function).
Meta-analysis Aune 2016 dose-response meta-analysis ✓ PubMed
In prospective cohorts, ~28 g/day of total nuts was associated with ~29% lower coronary heart disease, ~21% lower CVD mortality and ~22% lower all-cause mortality (not pistachio-specific).
meta-analysis Aune et al. 2016 ✓ Full text
Dose-response meta-analysis of prospective studies: each 28 g/day of nuts was associated with relative risks of 0.71 for coronary heart disease, 0.79 for cardiovascular disease, 0.81 for all-cause mortality, and 0.85 for cancer.
meta-analysis Mohammadifard et al. 2015 ✓ PubMed
Meta-analysis of RCTs on nuts and blood pressure: pistachios significantly reduced systolic blood pressure (-1.82 mmHg) and diastolic blood pressure (-0.80 mmHg), the only nut type showing significant BP-lowering effects.
RCT Sauder et al. 2015 ✓ Full text
Randomized crossover controlled-feeding trial in 30 adults with well-controlled type 2 diabetes: a diet with pistachios (20% energy, 4 weeks) lowered total cholesterol (4.00 vs 4.15 mmol/L, P=0.048) and triglycerides (1.56 vs 1.84 mmol/L, P=0.003) versus control, without changing HbA1c.
RCT Hernandez-Alonso et al. 2015 ✓ PubMed
Randomized crossover trial (EPIRDEM) in 54 prediabetic adults: 4 months of pistachios (57 g/day) lowered fasting glucose, insulin, and HOMA-IR and reduced fasting and post-OGTT glucose versus a control diet.
RCT Sari et al. 2010 ✓ PubMed
Randomized crossover trial in 32 healthy young men: a pistachio diet (20% energy, 4 weeks) reduced LDL-C and total cholesterol and improved endothelial function (flow-mediated dilation) and markers of oxidative stress versus a control Mediterranean diet.
Cohort Guasch-Ferre 2013 (PREDIMED cohort analysis) ✓ PubMed
Among high-CVD-risk adults, eating nuts >3 servings/week was associated with a 39% lower all-cause mortality risk versus non-consumers.
10 sources cited · 10 verified Search all studies on PubMed ↗

Common questions about Pistachio

What is Pistachio used for?

Pistachio is most often taken for Lowers LDL ('bad') and total cholesterol modestly in controlled trials, Reduces triglycerides without lowering HDL cholesterol, May modestly improve fasting blood glucose and insulin resistance in prediabetes/type-2 diabetes, Does not promote weight gain despite calorie density when eaten in place of other snacks. A green tree nut with trial-backed LDL-lowering and modest glycemic effects

Does Pistachio work — what does the evidence say?

Moderate evidence. Several controlled trials; effects real but modest or context-dependent. Pistachios have moderate human evidence for heart-related benefits, mostly from short-term randomized controlled trials (RCTs) on blood lipids. A 2023 meta-analysis of RCTs (Critical Reviews in Food Science and Nutrition) found pistachio consumption lowered total cholesterol, LDL cholesterol and triglycerides, with no change in HDL. For blood sugar, a 2022 meta-analysis of RCTs in the British Journal of Nutrition found modest reductions in fasting glucose and insulin resistance (HOMA-IR) but no clear effect on HbA1c, so glycemic benefits are real but limited. Evidence for hard outcomes (heart attacks, death) comes from observational cohorts and nut trials such as PREDIMED, where higher nut intake tracked with lower cardiovascular and all-cause mortality; these were not pistachio-specific. Trials consistently show pistachios do not cause weight gain when swapped for other snacks. Overall, pistachios are a heart-healthy nut with proven surrogate-marker effects but limited pistachio-specific outcome data.

What is the typical dose of Pistachio?

1-2 oz (~28-56 g, a small-to-medium handful) of unsalted pistachios per day, ideally replacing less healthy snacks

Is Pistachio safe? Any cautions or side effects?

Pistachios are a tree nut and can cause IgE-mediated allergic reactions including life-threatening anaphylaxis in sensitized people; anyone with tree-nut or peanut allergy should avoid them. They are calorie-dense (~160 kcal per oz), so portion control matters and salted/honey-roasted versions add sodium and sugar. Whole nuts are a choking hazard for children under about 4 years. Like other nuts, pistachios can rarely carry aflatoxin if improperly stored, so buy fresh and discard moldy or off-smelling nuts.

How many studies support Pistachio?

NutriDex cites 10 sources for Pistachio, graded "Moderate".

Cite this page
APA

Peh, D. (2026). Pistachio (Pistacia vera): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 26 Jun 2026, from https://nutridex.info/s/pistachio

BibTeX
@misc{nutridex_pistachio,
  author       = {Peh, Daryl},
  title        = {Pistachio (Pistacia vera): Benefits, Dosage, Side Effects \& Evidence},
  year         = {2026},
  howpublished = {NutriDex --- The Supplement Research Compendium},
  url          = {https://nutridex.info/s/pistachio},
  note         = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-06-26}
}

For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.

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