Brown sugar: sucrose with a color, counted like any other sugar

By a meta-analysis of 30 randomized trials in adults eating as they pleased, cutting sugars lowered body weight by 1.8 lb (95% CI 0.86 to 2.7; metric: 0.80 kg, 0.39 to 1.21) and adding sugars raised it by 1.7 lb (0.66 to 2.6; metric: 0.75 kg, 0.30 to 1.19). Those trials were about sugars in general. We found no trial of brown sugar on its own. In the same analysis, swapping sugars for other carbohydrates at equal calories moved weight by 0.09 lb (95% CI -0.09 to 0.29; metric: 0.04 kg, -0.04 to 0.13), which is no change, so the weight effect travels with the calories. That matters because brown sugar is nearly all sucrose. UK food tables give it 380 calories and 101.3 g of sucrose per 3.5 oz (100 g), a single table value with no spread. The minerals behind its healthier image are small. A 3.5 oz (100 g) portion holds 1.70 mg of iron, 56 mg of calcium and 140 mg of potassium, and a 5 g teaspoon gives under 0.1 mg of iron. On a US Nutrition Facts label brown sugar is declared as added sugar, like every sugar packaged as such. The word light in light brown sugar describes color and flavor, and US rules say it is not a claim of fewer calories.

The numbers, per 3.5 oz (100 g)

As people eat it, per 3.5 oz (100 g)

How much is actually in it

• UK food tables list brown sugar at 380 calories and 101.3 g of sucrose per 3.5 oz (100 g), with no fat, fiber or starch. — Brown sugar as sold in the UK, 100 g Evidence E source
  380 calories, 101.3 g sucrose, 0.1 g protein per 3.5 oz (100 g)
• The minerals that give brown sugar its health halo are small: 100 g holds 1.70 mg iron, 56 mg calcium and 140 mg potassium, so a 5 g teaspoon gives under 0.1 mg iron. — Brown sugar as sold in the UK, 100 g Evidence E source
  Iron 1.70 mg, calcium 56 mg, potassium 140 mg, magnesium 17 mg per 3.5 oz (100 g)

What a real portion looks like

• In US dietary survey coding a teaspoon of brown sugar weighs 5 g and a cup weighs 7.8 oz (220 g). — US portion measures for brown sugar Evidence E source
  1 teaspoon 5 g, 1 cup 220 g, quantity not specified 9 g

What your body absorbs

• The EU allows only one sugar comparison claim: foods with fructose raise blood glucose less than foods with sucrose, the sugar that makes up brown sugar. — Foods marketed in the EU Evidence E source
  Authorized claim, no effect size

What cooking and storage change

• Baking and fermentation can change how much added sugar is left in a food, and US rules make makers keep records when sugars undergo browning. — Foods where added sugars undergo fermentation or non-enzymatic browning Evidence E source
  Declared added sugars must be backed by records when browning or fermentation occurs
• Laboratory tests of 32 less refined cane, coconut and palm sugars found acrylamide from under 15 to 4011 micrograms per kg, formed during long heating. — 32 commercial non-centrifugal sugars bought in Asian countries (n = 32) Evidence D source
  Acrylamide <15 to 4011 ug/kg

What it does to your health

• By a meta-analysis of randomized trials in adults eating freely, cutting sugars lowered body weight by 1.8 lb (0.80 kg) and adding sugars raised it by 1.7 lb (0.75 kg). — Adults on ad libitum diets in randomized trials of at least two weeks (n = 30 trials) Evidence A source
  -1.8 lb (95% CI 0.86 to 2.7; metric: -0.80 kg, 0.39 to 1.21) with less sugar, +1.7 lb (0.66 to 2.6; metric: 0.75 kg, 0.30 to 1.19) with more
• By the same meta-analysis, swapping sugars for other carbohydrates at equal calories changed body weight by only 0.09 lb (0.04 kg), so the weight effect comes from calories. — Adults in isoenergetic randomized trials Evidence A source
  0.09 lb (95% CI -0.09 to 0.29; metric: 0.04 kg, -0.04 to 0.13), no change
• Observational data from 7 prospective cohorts link 20 g a day of sucrose from all sources to a slightly lower risk of type 2 diabetes (RR 0.95), an association that says nothing about adding sugar. — Healthy adults in 29 prospective cohorts, sucrose analysis in 7 cohorts (n = 223238) Evidence C source
  Sucrose RR 0.95 (95% CI 0.91 to <1.00) per 20 g/d, moderate certainty

Safety, limits and interactions

• According to WHO, free sugars, which include brown sugar, should stay below 10% of daily energy for adults and children, ideally below 5%. — Adults and children Evidence E source
  Under 10% of energy (strong), under 5% (conditional)

What people believe that the data does not support

• On a US Nutrition Facts label brown sugar counts as added sugar like white sugar, because the rule covers sugars packaged as such. — Packaged foods sold in the US Evidence E source
  All sugars packaged as such are declared as Added Sugars
• The word light in light brown sugar describes color and flavor, and US rules say it is not a claim of fewer calories. — Foods sold in the US Evidence E source
  Light in light brown sugar is not a nutrient content claim

Who this works differently for

• Observational data link sugars to tooth decay: 42 of 50 studies in children found at least one positive association between sugars and caries. — Children and adults in 55 studies, mostly cohort, population and cross-sectional (n = 55 studies) Evidence C source
  42 of 50 child studies and 5 of 5 adult studies reported a positive association

What is still unknown

• A 2026 reanalysis of 30 sugar trials found too few data to judge how sugars eaten in foods, rather than drinks, affect most body measures. — 30 randomized trials of free sugars from the EFSA upper-level review (n = 30 trials) Evidence A source
  Insufficient data for food-source sugars on most anthropometric outcomes

The bottom line

The EU authorizes one comparison between sugars: foods containing fructose give a lower blood glucose rise than foods containing sucrose or glucose. The register gives no size for that effect, and brown sugar, being sucrose, sits on the other side of it. Nobody we found has measured the glycemic response to brown sugar itself. Observational data from 7 prospective cohorts of healthy adults link 20 g a day of sucrose from all sources to a slightly lower risk of type 2 diabetes (RR 0.95, 95% CI 0.91 to just under 1.00). The diets were self-reported and brown sugar was not looked at separately, so this is an association and says nothing about adding more sugar. A systematic review of 55 studies, mostly observational, linked sugars to tooth decay: 42 of 50 studies in children and 5 of 5 in adults found at least one positive association. The data varied too much for the reviewers to pool them. Heat changes sugar. US rules make manufacturers keep records to back the added sugar figure on the label when sugars brown or ferment during processing, because the amount left can differ from the amount added. Laboratory tests of 32 less refined cane, coconut and palm sugars bought in Asian countries found acrylamide from under 15 to 4011 micrograms per kg. Those were non-centrifugal sugars such as panela and jaggery, which are different products from ordinary brown sugar, and the study did not assess any risk to people. The caution that applies here is the ordinary limit on sugar. WHO recommends that free sugars, brown sugar included, stay below 10 percent of daily energy for adults and children, and suggests below 5 percent. The 10 percent line rests on observational caries data of moderate quality, and the 5 percent line on very low quality data. For children the tooth decay findings above are the concrete reason. We have no card on pregnancy or on medicines for brown sugar specifically. A US teaspoon of brown sugar weighs 5 g and a cup weighs 7.8 oz (220 g). A 2026 reanalysis of 30 sugar trials found too few data to judge how sugars eaten in foods, as opposed to drinks, affect most body measures. Most of those trials ran under 3 months.

Sources

1. brsg-daily-r4-01 · reference dataset
   CoFID 17-060 Sugar, brown: Energy (kcal) 380 · Carbohydrate 101.3 g · Sucrose 101.3 g · Total sugars 101.3 g · Protein 0.1 g · Fat 0.0 g · AOAC fibre 0.0 g · Starch 0.0 g per 100 g
   CoFID 2021, Public Health England, code 17-060 (Sugar, brown) · checked 2026-09-29
2. brsg-daily-r4-02 · reference dataset
   CoFID 17-060 Sugar, brown: Iron 1.70 mg · Calcium 56 mg · Potassium 140 mg · Magnesium 17 mg · Sodium 31 mg · Zinc 0.1 mg per 100 g
   CoFID 2021, Public Health England, code 17-060 (Sugar, brown) · checked 2026-09-29
3. brsg-daily-r4-03 · reference dataset
   FNDDS 2710260 Sugar, brown (food code 91102010): 1 teaspoon, NFS 5 g · 1 cup, NFS 220 g · Quantity not specified 9 g
   USDA FNDDS 2021-2023, food code 91102010, fdc_id 2710260 (Sugar, brown) · checked 2026-09-29
4. brsg-daily-r4-07 · health claim register
   POL-HC-8295 Fructose Consumption of foods containing fructose leads to a lower blood glucose rise compared to foods containing sucrose or glucose Authorised
   EU Register on nutrition and health claims, claim POL-HC-8295, snapshot 2026-09-21 · checked 2026-09-29
5. brsg-daily-r4-05 · regulation
   where the added sugars are subject to fermentation and/or non-enzymatic browning, the manufacturer must make and keep records in accordance with paragraphs (g)(10) and (11) of this section to verify the declared amount of added sugars in the label and labeling of food.
   21 CFR 101.9, Nutrition labeling of food · checked 2026-09-29
6. brsg-daily-r4-14 · food chemistry analysis
   The acrylamide content of these 32 products ranged from < 15 to 4011 μg kg-1 .
   J Sci Food Agric, 2021 · checked 2026-09-29
7. brsg-daily-r4-08 · meta-analysis of RCTs
   In trials of adults with ad libitum diets (that is, with no strict control of food intake), reduced intake of dietary sugars was associated with a decrease in body weight (0.80 kg, 95% confidence interval 0.39 to 1.21; P<0.001); increased sugars intake was associated with a comparable weight increase (0.75 kg, 0.30 to 1.19; P=0.001).
   BMJ, 2012 · checked 2026-09-29
8. brsg-daily-r4-09 · meta-analysis of RCTs
   Isoenergetic exchange of dietary sugars with other carbohydrates showed no change in body weight (0.04 kg, -0.04 to 0.13).
   BMJ, 2012 · checked 2026-09-29
9. brsg-daily-r4-11 · meta-analysis of cohort studies
   In contrast, 20 g/d intakes of total sugar and sucrose were inversely associated with T2D (RR: 0.96; 95% CI: 0.94, 0.98; low certainty; and RR: 0.95; 95% CI: 0.91, <1.00; moderate certainty, respectively).
   Adv Nutr, 2025 · checked 2026-09-29
10. brsg-daily-r4-12 · guideline
    In both adults and children, WHO recommends reducing the intake of free sugars to less than 10% of total energy intake2 (strong recommendation). WHO suggests a further reduction of the intake of free sugars to below 5% of total energy intake (conditional recommendation3).
    WHO, Guideline: sugars intake for adults and children, 2015 · checked 2026-09-29
11. brsg-daily-r4-04 · regulation
    Added sugars are either added during the processing of foods, or are packaged as such, and include sugars (free, mono and disaccharides), sugars from syrups and honey
    21 CFR 101.9, Nutrition labeling of food · checked 2026-09-29
12. brsg-daily-r4-06 · regulation
    If a manufacturer can demonstrate that the word “light” has been associated, through common use, with a particular food to reflect a physical or organoleptic attribute (e.g., light brown sugar, light corn syrup, or light molasses) to the point where it has become part of the statement of identity, such use of the term “light” shall not be considered a nutrient content claim subject to the requirements in this part.
    21 CFR 101.56, Nutrient content claims for light or lite · checked 2026-09-29
13. brsg-daily-r4-10 · systematic review
    Of the studies, 42 out of 50 of those in children and 5 out of 5 in adults reported at least one positive association between sugars and caries.
    J Dent Res, 2014 · checked 2026-09-29
14. brsg-daily-r4-13 · meta-analysis of RCTs
    However, the data were limited in their representation of FS intake at typical population levels, and there were insufficient data to investigate the effect of FS from foods on most anthropometric outcomes.
    Nutrients, 2026 · checked 2026-09-29