Molasses is a thick, dark syrup left over from refining cane or beet sugar. It carries more trace minerals than any other common sweetener — but nutritionally it is still a caloric added sugar, with more sugar and calories per tablespoon than table sugar, and some blackstrap molasses has tested positive for lead and acrylamide under California's Proposition 65.
Molasses is the thick syrup that remains after sugar is extracted from cane or sugar beet. As the juice is boiled and sugar crystals are removed, the leftover liquid grows darker, more concentrated and less sweet with each round. Blackstrap molasses — the product of the third boiling — is the darkest and most concentrated, with the strongest flavor and the highest mineral content.
Because the sugar crystals have been removed, molasses is less sweet than table sugar and is used as much for its deep, bittersweet flavor as for sweetness. By weight it is still mostly sugar, but it carries more trace minerals — notably iron, calcium, potassium and magnesium — than any other common sweetener.
Molasses is mostly sugar — a mix of sucrose, glucose and fructose — so the body handles it much as it handles other sugars: it is caloric and raises blood glucose, with a glycemic impact generally in the moderate-to-high range. It contributes roughly 3 calories per gram, and because it is dense, a tablespoon carries somewhat more sugar and calories than a tablespoon of table sugar.
Its trace minerals are real and, for iron in particular, present in amounts worth noting for a sweetener. But they come packaged with that sugar, so molasses is not a practical way to meet mineral needs.
Molasses has the best mineral story of any common sweetener — and it is still an added sugar, with one extra consideration the others do not carry.
Molasses carries more trace minerals than other sugars, but nutritionally it remains a caloric added sugar.
Of the everyday sweeteners, molasses has the strongest claim to "nutrients," especially iron. That is genuinely a point in its favor relative to refined sugar. But the minerals arrive alongside a full load of sugar and calories, so the honest framing is the same as for honey: a real but small edge over table sugar, not license to use it freely.
US health guidance classifies molasses as an added sugar.
The 2025–2030 Dietary Guidelines for Americans count molasses among added sugars, and advise that "no amount of added sugars or non-nutritive sweeteners is recommended or considered part of a healthy or nutritious diet." When added to foods, molasses counts toward the Added Sugars line on the US Nutrition Facts panel, and the World Health Organization's guidance to limit free sugars includes it. The authorities treat molasses as an added sugar to limit, the same as table sugar.
Molasses can carry two contaminants, depending on the soil it was grown in and how it was processed. Lead can be present, especially in blackstrap — authorities have linked lead in molasses to the soil sugar is grown in and to the refining process. California's Proposition 65 requires a warning when a serving would expose someone to more than 0.5 µg of lead per day, and Prop 65 lead warnings have appeared on blackstrap molasses products; independent testing has reported some blackstrap above that threshold. Acrylamide, a probable human carcinogen formed when sugars are heated, can also be present, with darker grades generally higher, and Prop 65 acrylamide warnings have applied to molasses. These are category facts about some products, not a claim about any one brand, and levels vary by source and process.
| Property | Molasses | Allulose |
|---|---|---|
| Type of ingredient | Sugar (cane byproduct) | Rare sugar (monosaccharide) |
| Calories per gram | ~3 | ~0.4 |
| Glycemic index | Moderate–high | Zero |
| Browns & caramelizes | Yes | Yes |
| Counts as Added Sugar (US label) | Yes | No — FDA-excluded |
| Trace minerals | Highest among sweeteners | Minimal |
| Prop 65 contaminant flags | Lead / acrylamide (some products) | None of these |
| Health-guidance position | Limit (added sugar) | Named by neither the added-sugar nor the non-nutritive-sweetener warning |
Molasses has real trace minerals and unmatched flavor, but it is a caloric added sugar that raises blood sugar, counts on the Added Sugars line, and can carry Prop 65 contaminant warnings. Allulose is a rare sugar the FDA excludes from that line, with a fraction of the calories and a glycemic index of zero — though it lacks molasses's flavor and minerals.
Molasses carries more trace minerals than refined sugar — notably iron — so it is not identical to table sugar. But it is still a caloric added sugar that raises blood sugar, and the minerals come with a full load of sugar. Guidance treats it as an added sugar to limit.
Some can, especially blackstrap, where lead is linked to soil and the refining process. California's Prop 65 requires a warning above 0.5 µg of lead per serving per day, and Prop 65 lead warnings have appeared on blackstrap molasses; independent testing has reported some blackstrap above that threshold. Levels vary by source and process.
Blackstrap is the dark, concentrated syrup from the third boiling of sugar refining. It is the least sweet and most mineral-rich molasses — and, being the most concentrated, the grade where contaminant levels tend to be highest.
Yes. Molasses is mostly sugar, so it is caloric and raises blood glucose, with a glycemic impact generally in the moderate-to-high range.
Yes. When added to foods it counts toward the Added Sugars line on the US Nutrition Facts panel, and the Dietary Guidelines count it among added sugars.
See how molasses and the other sweeteners line up on calories, glycemic impact, minerals and added-sugar status — all side by side.
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