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B complex Calories
B-vitamin supplement
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
Quick answer
1 piece (small) of B complex (1 g) has 4 calories. That works out to 400 calories per 100 g. It contains 1 g of carbs, 0 g of protein, 0 g of fat and 0 g of fiber. Its 5 µg of B12 covers 208% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.
B complex Nutrition Facts
Selected: 1 piece (small) · 1 g
4
KCAL / 1G
Carbs
1g
· 0% DV
Protein
0g
· 0% DV
Fat
0g
· 0% DV
Fiber
0g
· 0% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 100% · Protein 0% · Fat 0%
B complex nutrition facts table · 1 piece (small) (1 g)
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 4 kcal | |
| Total fat | 0 g | 0% |
| Saturated fat | 0 g | 0% |
| Trans fat | 0 g | |
| Sodium | 0 mg | 0% |
| Total carbohydrate | 1 g | 0% |
| Fiber | 0 g | 0% |
| Protein | 0 g | 0% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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How Many Calories in 1 Small B complex?
| Serving | Amount | Calories |
|---|---|---|
| 1 piece (small) | 1 g | 4 kcal |
| 1 piece (mini) | 0.5 g | 2 kcal |
| 1 piece (medium) | 1.5 g | 6 kcal |
| 1 piece (large) | 2 g | 8 kcal |
| 2 piece (double) | 2 g | 8 kcal |
| 3 piece (triple) | 3 g | 12 kcal |
| 1 teaspoon (small) | 4 g | 16 kcal |
| 1 tablespoon (medium) | 8 g | 32 kcal |
| 100 g | 100 g | 400 kcal |
Calculated from 400 calories per 100 g.
Frequently Asked Questions About B complex
What is B complex used for?
B complex is a supplement that combines several B vitamins, which help the body carry out functions such as energy metabolism and normal nervous-system activity. It does not act as a stimulant, and taking it is not likely to boost energy if you are not deficient.
When is the best time to take B complex?
You can take B complex at any time of day; there is no universally best hour. If you notice that taking it late makes it harder to sleep, try taking it earlier instead.
Should you take B complex with food?
B complex can be taken with or without food. If it causes nausea or stomach discomfort on an empty stomach, take it with a meal and follow the directions on the product.
Why does B complex make urine bright yellow?
B complex can turn urine bright yellow because excess riboflavin, or vitamin B2, is excreted in urine. This common color change is usually harmless and does not mean the supplement is damaging your kidneys.
Can you take B complex every day?
Yes, B complex can be taken daily when the product directions and your needs support it. Avoid combining multiple supplements that contain the same B vitamins, and do not exceed the label dose.
What are the side effects of B complex?
B complex may cause nausea, stomach upset, or headache in some people. Taking high doses of vitamin B6 over time can damage nerves, so avoid prolonged use of high-dose products without medical guidance.
Does B complex give you energy?
B complex does not provide an immediate energy boost like a stimulant. B vitamins help the body process energy from food, and correcting a deficiency may improve related tiredness, but extra B vitamins do not guarantee more energy.
Does B complex cause weight gain?
No, B complex does not directly cause weight gain. B vitamins do not supply calories in the way food does; if your weight or appetite changes after starting it, consider other possible causes too.
Can B complex help with hair loss?
B complex is not a proven fix for hair loss in people who are not deficient. Correcting a B-vitamin deficiency may help with deficiency-related hair changes, but hair loss can have many causes and may need a separate assessment.
Can B complex interact with medications?
Yes, some B vitamins can interact with certain medicines, and the risk depends on the product and medication. If you take prescription drugs—especially levodopa—ask your doctor or pharmacist to check the specific B complex before using it.
B complex Vitamins & Minerals
Vitamins
B12
5µg · 208% DV
B5
2.5mg · 50% DV
B1
0.5mg · 42% DV
B2
0.5mg · 38% DV
Minerals
Calcium
0mg · 0% DV
Iron
0mg · 0% DV
Magnesium
0mg · 0% DV
Zinc
0mg · 0% DV
Sodium
0mg · 0% DV
Potassium ⭐
0mg · 0% DV
B complex Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
How to Burn Off B complex
To burn the 4 calories in 1 piece (small) (1 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
What is B complex?
B complex is a dietary supplement that combines several B vitamins in one product. The exact blend depends on the formulation, and it is commonly sold as a tablet, capsule or another small-dose form. Unlike a dish or drink, it is taken as a supplement, usually with water.
People worldwide may include B complex in a daily supplement routine, often alongside breakfast or another meal, though the label should guide timing and serving. A typical serving is about 1 g; it is not a meaningful source of protein or fat on its own. Check the ingredient panel if you already use other supplements, and choose a form that is easy for you to take.
How Nutritious Is B complex?
Nutrient density
Very high
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
Satiety score
Low
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
Is B complex Processed?
NOVA 4
Ultra-Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Does B complex Contain Allergens?
No known major allergens
Which Diets Is B complex Good For?
Vegan
✓ Suitable
Vegetarian
✓ Suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
B complex Fat Profile
SATURATED
0g
MONOUNSATURATED
0g
POLYUNSATURATED
0g
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Nutrition data compiled from USDA FoodData Central and scientific sources.