Brown Onions

Woolworths Brown Onions

  • Whole food
  • Checked
  • Grade C
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The short answer

Brown Onions by Woolworths has 36 kcal, 7.2 g carbs, 0.7 g protein and 0.1 g fat per serving (Per 80 g serving).

Calories36kcal
Carbs7.2g
Protein0.7g
Fat0.1g
About it

Brown onions from Woolworths are a low-calorie, nutrient-dense ingredient, perfect for athletes seeking to enhance their meal's flavor profile without adding significant calories. With 36.3 kcal per 80 g serving, these onions provide a modest 7.2 g of carbohydrates, including 4.9 g of sugars. They are primarily used as a base in soups, stews, and sauces, making them an excellent choice for athletes looking to prepare hearty meals that support training recovery and energy replenishment. While not a direct source of energy during exercise, onions can contribute to overall dietary diversity and micronutrient intake, such as potassium, which is crucial for muscle function and fluid balance. Due to their low sodium content (8 mg per serving), they are unlikely to impact sodium balance significantly during long endurance sessions.

  • Low-calorie, nutrient-dense
  • Rich in flavor for meal prep
  • Source of potassium for muscle function

On the label per serving, Per 80 g serving

Energy152 kJ
Calories36 kcal
Carbs7.2 g
Sugar4.9 g
Fibre1.2 g
Protein0.7 g
Fat0.1 g
Saturated fat0.0 g
Cholesterol0 mg
Sodium8 mg
Potassium146 mg

The numbers that matter on a training day

Carb density9%Carbs as a share of the food's weight: how hard it is on the gut at pace.
Glucose to fructose—Glucose with fructose lifts how much carb the gut can take in an hour.
Sodium per 100 kcal22 mgSalt for the energy it carries; sweat loses 300 to 600 mg an hour.
Energy density1.9 kJ/gEnergy you carry per gram, when grams in the pocket matter.
Servings for 60 g an hour8.3How many an hour for a 60 g carb baseline.
Glycaemic profileBrown onions have a low glycemic impact due to their low carbohydrate content per serving. They are unlikely to cause significant blood sugar spikes, making them suitable for inclusion in a balanced diet.

How we read foods ›

For endurance who it suits

Endurance verdict

While brown onions are not a direct fuel source for endurance events, they are a valuable ingredient for meal preparation, offering flavor and micronutrients. Their low-calorie and low-sodium profile make them suitable for athletes managing weight and dietary sodium intake. However, they should be complemented with other foods to meet carbohydrate and protein needs for recovery.

Who it is for

Brown onions are suitable for endurance athletes looking to enhance their meals with a flavorful, low-calorie ingredient. They are ideal for those preparing meals that require a savory base, such as soups and stews, which can be consumed post-training to aid recovery. Athletes focused on maintaining a balanced diet while managing caloric intake will find them beneficial.

Best sessions

Ideal for post-training meal preparation, particularly after long runs or rides where a hearty, nutrient-rich meal is desired. Not suitable for direct consumption during workouts.

Pros
  • Low in calories, aiding weight management
  • Rich in flavor, enhancing meal taste
  • Contains potassium for muscle function
  • Versatile in cooking applications
Cons
  • Low carbohydrate content for direct fueling
  • Not suitable for during-exercise consumption
  • Minimal protein content for recovery
Watch out for
  • Potential for digestive discomfort if consumed raw in large quantities
  • Not a significant source of energy or protein

Fuelling science in short

During a session

No, brown onions are not practical for consumption during workouts due to their solid form and lack of fast-acting carbohydrates.

Glycaemic profile

Brown onions have a low glycemic impact due to their low carbohydrate content per serving. They are unlikely to cause significant blood sugar spikes, making them suitable for inclusion in a balanced diet.

Electrolytes

Each serving provides 8 mg of sodium and 146 mg of potassium, contributing to electrolyte balance but not sufficient to meet the sodium needs during high sweat losses.

Carb breakdown
Total carbs
7.2 g
Hourly capacity
N/A

Race day before, during and after

Suits it for
  • BeforeDO NOT USE
  • DuringDO NOT USE
  • AfterUSE
  • Carb loadDO NOT USE
  • Every dayUSE

Brown onions are not suitable for pre-race or during-race consumption due to their low carbohydrate content and solid form, which can slow gastric emptying and fail to provide immediate energy. However, they are beneficial for recovery meals due to their flavor and micronutrient content, making them a versatile ingredient in everyday training nutrition.

NOT RECOMMENDED for pre-race use because they are low in carbohydrates and do not provide quick energy. Their fibrous nature could also slow gastric emptying.

Pair it with
  • Pair with lean protein for balanced recovery meals
  • Combine with whole grains for increased carbohydrate intake
  • Add to vegetable stews for enhanced micronutrient profile

For practitioners the evidence

Evidence grade: C — Limited direct evidence on performance impact; nutritional data primarily supports general dietary use.

In a carb load

Brown onions have a low carbohydrate density of 9 g per 100 g, which is insufficient for effective carbohydrate loading. A typical serving of 80 g contributes only 7.2 g of carbohydrates, far below the 600-840 g daily target for a 70 kg athlete. The volume required to meet loading needs would be impractical due to the low carb yield and high satiety effect from fiber content. Therefore, brown onions are not suitable for carb-loading phases.

Digestion and absorption

Brown onions are primarily digested in the small intestine. The carbohydrates present are absorbed via SGLT1 transporters for glucose and GLUT5 for fructose. The fiber content may slow gastric emptying slightly, but the overall low carbohydrate content means they have minimal impact on blood sugar levels. Any unabsorbed fibers may be fermented in the colon, potentially causing gas or bloating in sensitive individuals.

Recovery

Brown onions provide minimal carbohydrates and no significant protein, making them inadequate as a standalone recovery food. However, they can enhance the flavor of recovery meals that include adequate protein and carbohydrates. The potassium content supports muscle function and fluid balance, but onions should be paired with other foods to meet recovery nutrition targets.

Downsides

Brown onions can cause gastrointestinal discomfort if consumed in large quantities due to their fiber content. They offer minimal energy and protein, making them unsuitable as a primary fuel source. Additionally, their low sodium content does not support electrolyte replenishment during intense exercise. Athletes with FODMAP sensitivities may experience digestive issues.

Don't use it when
  • Do not use within 90 minutes of race start due to potential digestive discomfort.
  • Avoid during high-intensity sessions as they do not provide quick energy.
  • Not suitable for carb-loading due to low carbohydrate density.
Clinical risks
  • High fiber content may cause bloating or gas in sensitive individuals.
  • Low carbohydrate content fails to support glycogen replenishment.
  • Minimal sodium content does not aid in electrolyte balance during exercise.
  • Potential for digestive discomfort if consumed raw in large amounts.

Questions about Brown Onions

How many carbs are in Brown Onions by Woolworths?

7.2 g of carbs per serving (Per 80 g serving), with 36 kcal and 0.7 g protein.

Can I eat brown onions before a race?

It's not recommended to eat brown onions before a race due to their low carbohydrate content and potential to cause digestive discomfort.

How can I incorporate brown onions into my diet?

Use them as a base in soups, stews, and sauces to enhance flavor and add micronutrients.

Are brown onions good for recovery meals?

Yes, they can be used in recovery meals to add flavor and micronutrients, but should be paired with protein and carbohydrates.

Do brown onions provide enough energy for endurance activities?

No, they are low in carbohydrates and calories, making them unsuitable as a primary energy source during endurance activities.

What are the potential digestive issues with brown onions?

Consuming large quantities of raw onions may cause digestive discomfort due to their fibrous nature.

Can brown onions be used in hot-weather conditions?

Yes, they can be used in meals but should not be relied upon for hydration or electrolyte replenishment in hot conditions.

In the app

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