Parsnip Glycemic Index
Medium GI · The honest verdict
A moderate blood-sugar rise
Glycemic index
52–97
reported range
Glycemic load
9
Low GL
This food's glycemic index is 52–97, which is Medium GI.
Parsnip is a starchy root vegetable with a highly variable GI and a moderate glycemic load per serving. It is not a food to avoid, but portion size and cooking method are important considerations. This is general nutrition information, not medical advice — people with diabetes should discuss portion guidance with their care team.
GI numbers vary by source, ripeness, and how a food is prepared. This is general nutrition information — not medical advice. If you manage diabetes, confirm specifics with your care team.
Key facts
Parsnip's GI can range from 52 (boiled chunks) to 97 (mashed) — making cooking method critical for blood sugar impact.
One medium parsnip (80 g, cooked) provides about 2.6 g of fiber and 13 g of net carbs.
Cooling cooked starchy vegetables converts some starch to resistant starch, lowering glycemic impact when reheated.
What's actually inside
Per 100 g, with your typical serving noted as 80 g (about 1 medium parsnip), cooked. The carb family is what moves blood sugar — fiber is the number that softens the spike.
- Total carbs
- 15.9g
- Net carbs
- 13.3g
- total carbs minus fiber
- Fiber
- 2.6g
- slows the glucose rise
- Sugars
- 4g
- Protein
- 1.3g
- Calories
- 67kcal
Notable nutrients
- Vitamin C13 mg
- Folate67 mcg
- Potassium367 mg
- Manganese0.4 mg
- Vitamin K22 mcg
Is it a smart choice for blood sugar?
GI is only half the story — portion (glycemic load) and what you eat it with decide the real-world effect. Here's the honest read.
The verdict
Eat with portion awareness — a starchy root vegetable
Parsnip is a starchy root vegetable with a highly variable GI and a moderate glycemic load per serving. It is not a food to avoid, but portion size and cooking method are important considerations. This is general nutrition information, not medical advice — people with diabetes should discuss portion guidance with their care team.
Portion guidance
An 80 g serving (one medium parsnip) has roughly 13 g of net carbs and a glycemic load of around 9 — within the low GL range. Keeping portions to this size, avoiding mashing, and pairing with protein or healthy fat helps moderate the glucose response. Larger portions or mashed parsnip can produce a noticeably higher blood sugar rise.
This is general nutrition information, not personal medical advice. Blood sugar responses are individual — if you have diabetes or prediabetes, your care team can tell you how this fits your plan.
How to keep the spike small
The same food can land differently depending on how it's cooked and what it's eaten with. Use these levers to your advantage.
Boiling whole or in chunks
Raises GIBoiling raises GI compared to raw parsnip, but whole or chunked boiling tends to produce the lower end of the GI range (around 52) because cell structure is better preserved.
Mashing or pureeing
Raises GIMashing breaks down cell structure and gelatinizes starch more thoroughly, pushing GI toward the high end of the range (up to 97) — the largest single preparation effect for parsnip.
Roasting
Raises GIRoasting caramelizes surface sugars and can raise GI somewhat, though the effect depends on cut size and oven time. Larger chunks roasted briefly fare better than thin slices cooked until very soft.
Cooling after cooking (resistant starch)
Lowers the spikeCooling cooked parsnip for several hours converts some starch to resistant starch, which digests more slowly — a modest but real reduction in glycemic impact.
Pairing tip
Pair parsnip with lean protein (chicken, fish) and a source of fiber (leafy greens) to blunt the glucose response. Using vinegar or lemon in a dressing alongside parsnip can also modestly slow starch digestion. Avoid serving mashed parsnip as the main carb in a meal without a protein anchor.
Why GI numbers vary
Parsnip's GI is one of the most variable in the published literature. The University of Sydney database lists boiled parsnip at 52, which technically sits at the low-medium boundary. Other studies — particularly those testing overcooked or mashed parsnip — report values up to 97, which is high-GI territory. The spread reflects genuine sensitivity to cooking method, particle size, and study methodology. We report the full honest range (52–97) and classify parsnip as medium because the mid-range cooked value (~70s) is the most practical central estimate for typical culinary use.
Not medical advice. This page is general nutrition information about Parsnip. It isn't a diagnosis or a treatment plan. If you have diabetes, prediabetes, or another condition affecting blood sugar, confirm any dietary decisions with your doctor or care team.
Frequently Asked Questions
Parsnip's GI ranges from about 52 to 97 depending heavily on how it is prepared. Boiled parsnip in chunks comes in around 52 (the low-medium boundary), while mashed or long-cooked parsnip can reach 97. Because sources genuinely disagree based on cooking method, we report the honest range rather than a single number. For practical blood sugar planning, treat parsnip as a medium-to-higher-GI starchy vegetable and watch portion size.
Parsnip can fit into a diabetes-friendly diet with portion control and smart preparation, but it is not as freely eaten as non-starchy vegetables. An 80 g serving (one medium parsnip) has a glycemic load of about 9, which is within the low GL range — manageable if the rest of the meal is balanced. Avoid mashing, keep portions to one parsnip, and pair with protein and fiber. People with diabetes should confirm portion guidance with their care team — this is general nutrition information.
Dramatically. Boiling whole or in large chunks yields a GI of roughly 52, near the low-medium boundary. Mashing or pureeing can push the GI up to around 97 because it destroys cell structure and makes starch far more digestible. Roasting large chunks is an intermediate option. Cooling cooked parsnip converts some starch to resistant starch and modestly lowers the glycemic impact.
Boiled potato GI typically ranges from 60–90, similar to parsnip's range. Parsnip has slightly fewer carbs per serving and more fiber than most potato preparations, which is a small advantage. Both are starchy vegetables that benefit from portion control and pairing with protein. Neither is off-limits with careful planning, but neither is a free food for blood sugar management.
Parsnip is moderately high in carbs — about 13 g net carbs per 80 g cooked serving — so it requires counting within a low-carb budget. On a standard low-carb plan (100 g net carbs/day), a single parsnip fits easily. On strict keto (under 20–30 g/day), one parsnip uses a large portion of the daily budget and is generally limited or avoided.
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Reviewed by
Curex Editorial TeamReviewed for accuracy
Last reviewed July 2026