Vegetable Crisps or Chips
Food · Other · Food, Typed Supps
They are vegetables the way hot chips are vegetables: the frying oil is most of what you are eating.
Stage by stage
- Intake (Surface salt and crunch): Salt sits on the outside of the crisp where it hits the tongue immediately, which drives the palatability of the whole category.
- Digestion (Starch and absorbed oil): The gut digests the vegetable starch and the large quantity of oil the thin slices took up during frying.
- Absorption (Fat and carotenoids): Fat is absorbed with bile, carrying the sweet potato's beta-carotene efficiently along with it.
- Downstream (Sodium and energy load): Sodium is excreted renally; the energy, two thirds of it from frying oil, is used or stored.
Time to effect
- Hours: The sodium load produces thirst within an hour or two; the energy density matters only as a repeated habit.
Allergens
None of the fourteen major allergens. May contain: Gluten, Milk, Soya, Sulphites. Derived from what this food is, not from a product label.
Eating patterns
Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher. Depends on the product: Low-FODMAP, Gluten-free.
Satiety
76 on the satiety index, where white bread is 100 — low. Modelled from the Holt et al. (1995) measurements.
Environmental footprint
0.5 kg CO2e and 108 litres of freshwater per kg, matched to "Other vegetables" in Poore & Nemecek (2018), Science 360.
Cost band
Mid — roughly £4 per kg, as a band midpoint rather than a price.
Key nutrients
Nutrition per 100g
- Calories: 490
- Protein: 3g
- Carbohydrate: 47.7g
- of which sugars: 12.4g
- Fat: 31.1g
- of which saturated: 10.1g
- Fibre: 6.3g
- Sodium: 440mg
Food vs. supplement
There is no supplement comparison worth making. The useful comparison is with the vegetable itself: oven-roasting the same sweet potato in a spoonful of oil delivers the same beta-carotene, with the fat needed to absorb it, at a fraction of the energy and salt.
Kitchen tip
Thin-slice sweet potato or beetroot, toss in a teaspoon of oil, bake or air-fry, and salt after cooking. Salting at the end means less salt is needed for the same taste, because it stays on the surface.
Common myth
"Vegetable crisps count towards your vegetables." In reality: They do not. Frying thin slices loads them with oil until roughly a third of the weight is fat, and the sodium and energy figures sit alongside potato crisps rather than alongside the vegetable. The beta-carotene from sweet potato is real, and it arrives attached to 490 calories per 100g.
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