Berry Jam

Food · Pantry & Condiment · Food, Typed Supps

Two-thirds sugar, and the sugar is why it keeps.

Stage by stage

Intense flavour (Taste): Concentrated enough that a thin layer tastes much like a thick one.
Preservation (The jar): At 65% sugar, water is bound tightly enough that nothing can grow in it.
Free sugar (Circulation): 64.7 g added per 100 g; a tablespoon is around 13 g.
Fructose (Liver): Both the added sucrose and the fruit sugars deliver fructose to the liver.

Timing

Nothing to time. It arrives on bread, which slows things slightly compared with the same sugar in a drink.

Time to effect

15–30 min: Glycaemic peak.
Per tablespoon: Around 13 g of free sugar.

Allergens

None of the fourteen major allergens. May contain: Sulphites. Derived from what this food is, not from a product label.

Eating patterns

Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher, Gluten-free. Depends on the product: Low-FODMAP.

Satiety

Not scored: the satiety index is measured on 240 kcal servings, and nobody eats a 240 kcal serving of this. The question does not apply rather than the answer being unknown.

Environmental footprint

1.5 kg CO2e and 420 litres of freshwater per kg, matched to "Berries & grapes" in Poore & Nemecek (2018), Science 360.

Cost band

Mid — roughly £9 per kg, as a band midpoint rather than a price.

Key nutrients

Sugar

Nutrition per 100g

Calories: 263
Protein: 0.3g
Carbohydrate: 67.3g
of which sugars: 67.2g
Fibre: 1.6g
Sodium: 12mg

Food vs. supplement

Jam is a good example of sugar doing a job beyond taste. Take it out and the product needs refrigeration, because the sugar was the preservative — which is why reduced-sugar jams carry storage instructions the full-sugar ones do not.

Kitchen tip

Spread it thinner rather than switching product. The taste barely changes and the sugar halves, which is more than most swaps achieve.

Common myth

“It’s made with real fruit, so it’s better than a spread.” In reality: All jam is made with real fruit — that is what makes it jam — and the phrase distinguishes nothing. Of the 67.2 g of sugar per 100 g, 64.7 g was added; the berries contribute about two and a half grams. The sugar is there partly to preserve it, which is genuinely functional, and it is still free sugar. Thinner spreading beats brand switching here.

Recipes that use it

Swedish Meatballs