Does avocado raise blood sugar?

No. A 2025 meta-analysis pooled 6 randomized trials in 1,174 adults, mostly overweight or obese, eating 0.88 to 11 oz (25 to 300 g) of avocado a day for 4 to 24 weeks, and fasting blood glucose did not change: a difference of -0.05 mg/dL with an interval from -0.44 to 0.33, though the reviewers' unit may be a misprint for mmol/L. Two earlier meta-analyses reached the same answer.

Established. In the trials so far, mostly in adults with overweight or obesity, eating avocado did not raise fasting blood sugar. Three meta-analyses of randomized trials, from 2018, 2023 and 2025, found no change, and in the largest single trial, 1,008 adults for six months, insulin changed no differently from the usual diet.

The composition explains why there is little to raise it with. One raw avocado of 5.3 oz (150 g) has about 12.8 g of carbohydrate, and 10.1 g of that is fiber, with 1.0 g of sugars.

What the trials found

Three meta-analyses

The 2025 review is the largest, and its result on fasting glucose sat close to zero with no heterogeneity between trials. The reviewers rated that outcome high quality with serious imprecision. A 2018 meta-analysis of 18 avocado studies in 481 people found no difference in blood glucose, but only 2 of those studies measured it and they were compared in words rather than pooled. A small 2023 meta-analysis of 7 randomized trials, in Cureus, concluded that an avocado diet did not affect fasting glucose. It received a correction in 2024, not a retraction.

The large trial

The Habitual Diet and Avocado Trial gave 1,008 adults with a large waist one large avocado a day for six months, against their usual diet. Insulin, body weight and body mass index changed similarly in both groups. The Hass Avocado Board funded it.

Smaller trials, including people with insulin problems

In 93 adults with overweight or obesity and insulin resistance, replacing carbohydrate foods with avocado for 12 weeks did not reach significance on the main insulin sensitivity measure. HbA1c and fasting insulin showed trends toward avocado that also did not reach significance. In a 2026 double-blind feeding trial of 42 adults with high triglycerides, about 6.3 oz (180 g) of avocado a day in place of solid fats and added sugar did not change glucose or insulin over two 3-week periods.

In a 1994 crossover trial of 12 women with type 2 diabetes, a diet high in monounsaturated fat from avocado and olive oil kept blood sugar control similar to a high-carbohydrate diet for four weeks. That trial is very small and the avocado cannot be separated from the olive oil. In 26 overweight adults, a lunch with about half a Hass avocado built in gave a lower insulin response over three hours than the same lunch without it, from a single meal, and the abstract does not report glucose separately.

A freeze-dried extract of unripe avocado, 10 g a day for 12 weeks in 60 adults with obesity, did not change glucose tolerance. That is a supplement made from unripe fruit, and it says nothing about eating a ripe one.

Observational data

Among up to 14,591 Hispanic or Latino adults in the United States, those with type 2 diabetes who ate more avocado had lower HbA1c and fasting glucose, with no association in prediabetes. That is a cross-sectional snapshot, so reverse causation and other differences between eaters and non-eaters remain possible. In the Mexican survey above, women who ate avocado had lower odds of diabetes, with an adjusted odds ratio of 0.79, and men did not.

Unsettled. Whether avocado lowers blood sugar, as opposed to leaving it alone, is not settled. The hints come from trends that missed significance, one meal test and observational snapshots. No meta-analysis reports HbA1c or post-meal glucose, and only one tiny 1994 trial tested an avocado diet in people with type 2 diabetes.

Who should be careful

Not for everyone. Avocado flesh holds about 576 mg of potassium per 3.5 oz (100 g) by USDA data. The NIH Office of Dietary Supplements says that in people with chronic kidney disease, or taking ACE inhibitors or potassium-sparing diuretics, even dietary potassium below the adequate intake can cause high blood potassium. If either applies to you, a daily avocado habit is worth raising with your doctor.

People allergic to latex should know about latex-fruit syndrome. A systematic review found avocado among the most common allergenic fruits in people with it, alongside banana, kiwifruit and papaya.

What expert bodies say

The American Diabetes Association lists avocado first among sources of monounsaturated fat in its healthy eating guidance. It says nothing there about avocado and blood sugar. We found no statement from NIDDK, EFSA or the ADA on avocado and blood glucose specifically.

How we searched

What would change this answer

• A meta-analysis that reports HbA1c or blood sugar after meals, not only fasting glucose. None does yet.
• A randomized trial of avocado in adults with type 2 diabetes larger than the 12 women studied in 1994.
• Independent funding. The largest trial was paid for by the avocado industry, and a repeat without that tie would strengthen the result.

More on the fruit itself is on the avocado page.

Sources

1. ev-avbs-01 · Meta-analysis or systematic review · systematic review and random-effects meta-analysis of RCTs with GRADE · n = 1174
   The meta‐analysis revealed a lowering but non‐statistically significant effect of avocado supplementation on FBG (WMD: −0.05 mg/dL; 95% CI: −0.44, 0.33; p = 0.79).
   
   Who: adults in parallel RCTs of avocado intake (25-300 g/day, 4-24 weeks), mostly overweight or obese
   Effect: fasting blood glucose WMD -0.05 mg/dL (95% CI -0.44 to 0.33), p=0.79, I2=0%
   Certainty: GRADE for FBG is high, but with serious imprecision; the unit mg/dL with such a narrow CI is doubtful (possibly mmol/L).
   Food Science & Nutrition, 2025 (Effects of Avocado Products on Cardiovascular Risk Factors in Adults: A GRADE-Assessed Systematic Review and Meta-Analysis) · checked 2026-10-07 · we read the fulltext
2. ev-avbs-02 · Meta-analysis or systematic review · systematic review and random-effects meta-analysis, glucose by qualitative synthesis · n = 481
   In qualitative synthesis, there was no significant difference between groups for blood glucose (2 studies), homeostasis model assessment (1 of 2 studies), oxidized LDL (2 studies), high-sensitivity C-reactive protein (2 studies), or apolipoprotein B (2 studies) or, in 1 study each, for body mass index, systolic and diastolic blood pressure, arterial compliance, fibrinogen, interleukin 6, tumor necrosis factor α, and serum nitric oxide.
   
   Who: adults in 18 studies of avocado intake and cardiovascular risk factors
   Effect: blood glucose: no significant difference (2 studies, qualitative synthesis); HOMA: no difference in 1 of 2 studies
   Certainty: Glucose was not pooled quantitatively, only 2 studies.
   Am J Clin Nutr, 2018 · checked 2026-10-07 · we read the abstract
3. ev-avbs-03 · Meta-analysis or systematic review · systematic review and meta-analysis of RCTs (PRISMA) · n = 7 trials
   The avocado diet did not affect the TG and fasting glucose levels with minimal effect on SBP values.
   
   Who: adults in 7 RCTs comparing an avocado diet with habitual or low-fat diets
   Effect: fasting glucose not affected; LDL lower
   Certainty: Cureus, small review; a correction was issued in 2024 (38357408), not a retraction.
   Cureus, 2023 (Effect of Avocado Consumption on Risk Factors of Cardiovascular Diseases: A Systematic Review and Meta-Analysis) · checked 2026-10-07 · we read the fulltext
4. ev-avbs-04 · Randomized controlled trial(s) · multicentre randomized controlled parallel trial · n = 1008
   Changes in the other additional and post hoc measures (body weight, body mass index, insulin, very low-density lipoprotein concentrations, and total cholesterol:high-density lipoprotein cholesterol ratio) were similar between the 2 groups.
   
   Who: free-living adults with elevated waist circumference, 1 large avocado/day vs habitual diet for 6 months
   Effect: change in insulin similar between groups (with body weight, BMI, VLDL and total:HDL cholesterol ratio)
   Certainty: The largest RCT; funded by the Hass Avocado Board.
   J Am Heart Assoc, 2022 · checked 2026-10-07 · we read the abstract
5. ev-avbs-05 · Randomized controlled trial(s) · single-center randomized controlled parallel trial · n = 93
   Differences in fasting insulin (Δ0-12 wk, P = 0.0855) and improved glycated hemoglobin (Δ0-12 wk, P = 0.0632) after AV compared with C were suggested.
   
   Who: adults with overweight or obesity and insulin resistance, avocado vs energy-matched low-fat low-fiber control replacing carbohydrate foods
   Effect: Matsuda index not different (P=0.109); HbA1c P=0.063 and fasting insulin P=0.086 trends favoring avocado
   Certainty: Primary endpoint not reached; trends only.
   J Nutr, 2022 · checked 2026-10-07 · we read the abstract
6. ev-avbs-06 · Randomized controlled trial(s) · randomized double-blind controlled-feeding crossover trial · n = 42
   Percentage changes for other lipoprotein lipids, glucose, insulin, and blood pressures did not significantly differ (P > 0.05) between conditions.
   
   Who: adults with triglycerides 135-499 mg/dL, about 180 g avocado/day replacing saturated fat and added sugar, two 3-week periods
   Effect: glucose and insulin percentage changes not different (P>0.05); non-HDL cholesterol -4.65%, triglycerides -17.4%
   Certainty: Short periods of 3 weeks each.
   Am J Clin Nutr, 2026 · checked 2026-10-07 · we read the abstract
7. ev-avbs-07 · Randomized controlled trial(s) · randomized crossover trial · n = 12
   Glycemic control was similar with both diets.
   
   Who: women with non-insulin-dependent diabetes, avocado and olive oil HMUFA diet vs high complex carbohydrate diet, 4 weeks each
   Effect: glycemic control similar with both diets; triglycerides -20% vs -7%
   Certainty: Very small, 1994; avocado together with olive oil.
   Diabetes Care, 1994 · checked 2026-10-07 · we read the abstract
8. ev-avbs-08 · Randomized controlled trial(s) · randomized 3x3 single-blind crossover trial · n = 26
   Compared to the AI meal, the AUC(0-3h) for blood insulin was higher in the C and AA meals (P=0.04 and P=0.05, respectively).
   
   Who: healthy overweight adults, standardized lunch with or without about half a Hass avocado
   Effect: insulin AUC(0-3h) higher for control (P=0.04) and avocado-added (P=0.05) meals than avocado-inclusive meal
   Certainty: A single meal; the abstract gives no separate result for glucose.
   Nutr J, 2013 · checked 2026-10-07 · we read the abstract
9. ev-avbs-09 · Randomized controlled trial(s) · double-blind randomized placebo-controlled trial · n = 60
   There were no between-group differences in glucose AUC (p = 0.678), insulin AUC (p = 0.091), or cardiovascular outcomes.
   
   Who: nondiabetic adults with obesity, 10 g freeze-dried unripe avocado (mannoheptulose-rich) vs placebo daily for 12 weeks
   Effect: glucose AUC p=0.678, insulin AUC p=0.091 between groups
   Certainty: Extract of unripe avocado, not the ordinary fruit.
   Nutrients, 2023 · checked 2026-10-07 · we read the abstract
10. ev-avbs-10 · Observational data · cross-sectional analysis · n = 14591
    In those with T2D (treated and untreated), avocado intake was associated with lower hemoglobin A1c (HbA1c; β = -0.36 ± 0.21, P = 0.02), and lower fasting glucose (β = -0.27 ± 0.12, P = 0.02).
    
    Who: Hispanic/Latino adults in a US cohort, cross-sectional analysis stratified by glycemic status
    Effect: in T2D: HbA1c beta -0.36, fasting glucose beta -0.27 (both P=0.02); no association in prediabetes
    Certainty: Cross-sectional; reverse causality and residual confounding possible.
    Nutr Metab Cardiovasc Dis, 2023 · checked 2026-10-07 · we read the abstract
11. ev-avbs-11 · Observational data · cross-sectional survey analysis · n = 25640
    Avocado consumers had lower odds of diabetes in both unadjusted (odds ratio [OR] 0.762, 95% CI 0.639 to 0.907) and adjusted (OR 0.792, 95% CI 0.632 to 0.993) models among women but not men (OR 1.192, 95% CI: 0.907 to 1.566 and OR 0.914, 95% CI 0.675 to 1.239 for unadjusted and adjusted models, respectively).
    
    Who: adults aged 20+ in the Mexican National Health and Nutrition Survey 2012, 2016, 2018
    Effect: women adjusted OR 0.792 (95% CI 0.632 to 0.993); men OR 0.914 (0.675 to 1.239)
    Certainty: Self-reported diabetes; OR is odds, not risk; women only.
    J Acad Nutr Diet, 2025 · checked 2026-10-07 · we read the abstract
12. ev-avbs-12 · Position of an expert body · food composition database · n = —
    Avocado, raw, FNDDS code 63105010, fdc_id 2709223: Carbohydrate, by difference 8.53 G per 100 g, 1 fruit 150 g 12.8 G; Fiber, total dietary 6.7 G per 100 g, 1 fruit 150 g 10.1 G; Total Sugars 0.66 G per 100 g, 1 fruit 150 g 1.0 G
    
    Who: USDA FNDDS food composition data
    Effect: per 3.5 oz (100 g): carbohydrate 8.53 g, fiber 6.7 g, total sugars 0.66 g; per fruit 150 g: 12.8 g, 10.1 g, 1.0 g
    Certainty: Explains why avocado barely raises glucose: few digestible carbohydrates.
    USDA FNDDS, food code 63105010, Avocado, raw (fdc_id 2709223) · checked 2026-10-07 · we read the dataset
13. ev-avbs-13 · Position of an expert body · fact sheet · n = —
    However, in people with impaired urinary potassium excretion due to chronic kidney disease or the use of certain medications, such as angiotensin converting enzyme (ACE) inhibitors or potassium-sparing diuretics, even dietary potassium intakes below the AI can cause hyperkalemia [11].
    
    Who: people with impaired urinary potassium excretion, NIH potassium fact sheet
    Effect: hyperkalemia possible even at dietary potassium intakes below the AI
    Certainty: Avocado is rich in potassium; in diabetes CKD and ACE inhibitors are common, so daily avocado is a question for the doctor.
    NIH Office of Dietary Supplements, Potassium Fact Sheet for Health Professionals · checked 2026-10-07 · we read the section
14. ev-avbs-14 · Observational data · systematic literature review of observational studies and case reports, PRISMA · n = —
    Our findings indicate that the most prevalent allergenic fruits in patients with LFS are banana, avocado, kiwifruit, and papaya.
    
    Who: latex-allergic patients in original studies; prevalence of latex-fruit syndrome 4-88%
    Effect: most prevalent fruits: banana, avocado, kiwifruit, papaya
    Certainty: Who should be careful: people with latex allergy.
    Journal of Clinical Medicine, 2024 · checked 2026-10-07 · we read the abstract
15. ev-avbs-15 · Position of an expert body · association patient guidance · n = —
    Sources of monounsaturated fat include: Avocado
    
    Who: people with diabetes and the general public (ADA eating-well guidance)
    Effect: avocado named as a monounsaturated fat source; no statement on blood sugar effect
    Certainty: T3, context only; ADA says nothing here about glucose.
    American Diabetes Association, Fats (Healthy Living, Eating Well) · checked 2026-10-07 · we read the section
16. avol-daily-r7-01 · Position of an expert body · dataset · n = 8
    Avocado, Hass, peeled, raw | Total lipid (fat) 20.31 g (range 18.76-21.83, 8 samples) | Potassium, K 576.4 mg (range 528.0-623.0, 8 samples)
    
    Who: Avocado, Hass, peeled, raw; 8 analyzed samples
    Effect: fat 20.31 g/100 g (range 18.76-21.83); potassium 576.4 mg/100 g (range 528-623)
    Certainty: Foundation Foods, 8 samples; small spread
    USDA FoodData Central, Foundation Foods, release 2026-04-30 · checked 2026-10-02 · we read the dataset