Key findings
- 1High sugar content (55-65%) is the traditional preservation mechanism, it reduces water activity to inhibit bacterial growth
- 2Pectin is a naturally occurring carbohydrate from fruit cell walls, not a synthetic additive
- 3In our analysis, jam averages a Processing Score of 4.0, which is Level 2
- 4"No sugar added" jams use alternative sweeteners or fruit juice concentrate, which may actually be more processed than simple sugar-based jam
Why is Jam Level 2 on average?
Jam-making is fundamentally a preservation technique: fruit is cooked with sugar and pectin (a natural carbohydrate found in fruit cell walls) to create a gel that resists microbial growth. The high sugar concentration (typically 55-65% of the final product) acts as a natural preservative by binding water so bacteria cannot use it: a process called water activity reduction. Pectin, naturally present in citrus peel, apple cores, and other fruits, forms the gel structure when heated with sugar and acid. Traditional jam needs only fruit, sugar, and sometimes added pectin and lemon juice. Commercial jams introduce processing when they replace sugar with HFCS, add potassium sorbate (preservative), use calcium chloride (firming agent), or include artificial colors to standardize appearance across seasons. In our analysis, jam averages a Processing Score of 4.0, which is Level 2.
How 3,846 jam products break down
Share of products at each processing level, in our analysis.
Jam brand comparison
From least to most processed in our database.
How to read a jam label
- 1
Simple jam should list fruit, sugar, pectin, and citric acid (or lemon juice); 3-4 ingredients
- 2
"Fruit spread" or "preserves" are similar products with slight texture differences
- 3
HFCS as a sweetener instead of sugar indicates more industrial processing
- 4
Potassium sorbate is a chemical preservative; unnecessary in traditional high-sugar jam
Ketzal for iPhone
Got Jam At Home?
Scan yours in Ketzal to see how your exact product scores, not just the average, plus a less processed swap.
Scan It Free
Frequently asked questions
Is jam ultra-processed?
In our analysis, jam averages a Processing Score of 4.0, which is Level 2. Traditional jam (fruit, sugar, pectin) is a simple preservation method; commercial jams with HFCS, artificial colors, or chemical preservatives are more processed. Read the ingredient list to distinguish between the two.
Is "no sugar added" jam less processed?
Not necessarily. "No sugar added" jams often use concentrated fruit juice (which is processed sugar), modified pectin, and artificial sweeteners. Paradoxically, traditional jam with sugar and fruit can be less processed than a "no sugar added" version with more industrial ingredients.
What is pectin in jam?
Pectin is a natural carbohydrate found in fruit cell walls, concentrated in apple cores, citrus peel, and quince. When heated with sugar and acid, it forms the gel that gives jam its structure. Commercial pectin is extracted from citrus peel or apple pomace; it is a natural ingredient, not synthetic.