What the evidence says. Several controlled trials; effects real but modest or context-dependent.
Nutrition per serving 1 oz (28 g, ~19 pecan halves)
Sugars1.1 g4%
Fibre2.7 g10%
Other carbs0.1 g0%
Protein2.6 g9%
Fat20.1 g72%
Other1.4 g5%
What's in one serving, by weight — average composition (USDA).One serving as % of the adult daily requirement (FDA Daily Values). The bold outer ring = 100% of a day's needs.
Pecan (Carya illinoinensis) is a nut or seed used for lowers ldl and total cholesterol in controlled trials (~6% ldl reduction). NutriDex grades the human evidence as Moderate. Pecans have moderate, lipid-focused evidence. Several short-to-medium randomized controlled trials show that eating roughly 1-2 oz (28-57 g) daily, in place of usual snacks, meaningfully lowers LDL cholesterol (around 6%), total and non-HDL cholesterol, apolipoprotein B and triglycerides, and improves cholesterol ratios and lipoprotein particle counts. A 2018 Nutrients pecan-rich-diet RCT in overweight adults also improved fasting insulin and insulin resistance, and a 2025 Journal of Nutrition snack-substitution RCT confirmed the lipid benefits with better diet quality and no weight gain. These are surrogate markers measured over weeks, not hard cardiovascular endpoints. Pecan-specific trials on heart attacks, diabetes or mortality do not exist; those benefits are extrapolated from the wider tree-nut literature, where large cohorts (Aune 2016 meta-analysis) and the PREDIMED trial link nut intake to lower cardiovascular events and all-cause mortality. As a single nut, pecans sit at moderate evidence: consistent lipid effects, but less data than walnuts or almonds.
Purported Benefits
✓Lowers LDL and total cholesterol in controlled trials (~6% LDL reduction)
✓Reduces non-HDL cholesterol, apolipoprotein B and triglycerides
✓Improves the total-to-HDL cholesterol ratio and lipoprotein particle profile
✓Improves fasting insulin and insulin sensitivity (HOMA-IR) in short trials
✓Part of the tree-nut group linked to lower CVD and all-cause mortality in cohorts
✓Nutrient-dense source of MUFA, fiber and antioxidants with no weight gain at studied doses
Dosing & Compounds
Typical Dose
About 1-2 oz (28-57 g) per day, a small-to-large handful, replacing other snacks rather than added on top.
Active Compounds
Monounsaturated fat (oleic acid)Polyunsaturated fat (linoleic acid)Dietary fiberPhytosterols (beta-sitosterol)Vitamin E (gamma-tocopherol)MagnesiumPolyphenols and flavonoids (ellagic acid, condensed tannins)L-arginineZinc and copper
Safety & Cautions
⚠
Pecans are tree nuts and can trigger IgE-mediated allergy, including life-threatening anaphylaxis; anyone with tree-nut or peanut allergy should avoid them. They are calorie-dense (about 195-200 kcal per 1 oz/28 g), so use them to replace other snacks rather than add to the diet to avoid weight gain. Whole or large pieces are a choking hazard for young children. Buy fresh and store cool/airtight, as their high unsaturated-fat content makes them prone to rancidity. Educational only — always check with your doctor or pharmacist before combining Pecan with any medicine.
Pecan is most often taken for Lowers LDL and total cholesterol in controlled trials (~6% LDL reduction), Reduces non-HDL cholesterol, apolipoprotein B and triglycerides, Improves the total-to-HDL cholesterol ratio and lipoprotein particle profile, Improves fasting insulin and insulin sensitivity (HOMA-IR) in short trials. A buttery tree nut shown in trials to lower LDL cholesterol
Does Pecan work — what does the evidence say?
Moderate evidence. Several controlled trials; effects real but modest or context-dependent. Pecans have moderate, lipid-focused evidence. Several short-to-medium randomized controlled trials show that eating roughly 1-2 oz (28-57 g) daily, in place of usual snacks, meaningfully lowers LDL cholesterol (around 6%), total and non-HDL cholesterol, apolipoprotein B and triglycerides, and improves cholesterol ratios and lipoprotein particle counts. A 2018 Nutrients pecan-rich-diet RCT in overweight adults also improved fasting insulin and insulin resistance, and a 2025 Journal of Nutrition snack-substitution RCT confirmed the lipid benefits with better diet quality and no weight gain. These are surrogate markers measured over weeks, not hard cardiovascular endpoints. Pecan-specific trials on heart attacks, diabetes or mortality do not exist; those benefits are extrapolated from the wider tree-nut literature, where large cohorts (Aune 2016 meta-analysis) and the PREDIMED trial link nut intake to lower cardiovascular events and all-cause mortality. As a single nut, pecans sit at moderate evidence: consistent lipid effects, but less data than walnuts or almonds.
What is the typical dose of Pecan?
About 1-2 oz (28-57 g) per day, a small-to-large handful, replacing other snacks rather than added on top.
Is Pecan safe? Any cautions or side effects?
Pecans are tree nuts and can trigger IgE-mediated allergy, including life-threatening anaphylaxis; anyone with tree-nut or peanut allergy should avoid them. They are calorie-dense (about 195-200 kcal per 1 oz/28 g), so use them to replace other snacks rather than add to the diet to avoid weight gain. Whole or large pieces are a choking hazard for young children. Buy fresh and store cool/airtight, as their high unsaturated-fat content makes them prone to rancidity.
How many studies support Pecan?
NutriDex cites 11 sources for Pecan, graded "Moderate".
Cite this page
APA
Peh, D. (2026). Pecan (Carya illinoinensis): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 16 Sept 2026, from https://nutridex.info/s/pecan
BibTeX
@misc{nutridex_pecan,
author = {Peh, Daryl},
title = {Pecan (Carya illinoinensis): Benefits, Dosage, Side Effects \& Evidence},
year = {2026},
howpublished = {NutriDex --- The Supplement Research Compendium},
url = {https://nutridex.info/s/pecan},
note = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-09-16}
}
For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.