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Lemon (whole) Calories
Vitamin C powerhouse, low calorie, antioxidant source
CALORIES
GI
POTASSIUM
FIBER
Lemon (whole) Nutrition Facts
Selected: 100 g
29
KCAL / 100G
Carbs
9.3g
· 84%
Protein
1.1g
· 10%
Fat
0.3g
· 6%
Fiber
2.8g
Lemon (whole) Vitamins & Minerals
Vitamins
Vitamin C
53mg · 59% DV
B6
0.08mg · 5% DV
B5
0.19mg · 4% DV
B1
0.04mg · 3% DV
Minerals
Iron
1mg · 6% DV
Potassium ⭐
138mg · 4% DV
Calcium
26mg · 3% DV
Magnesium
8mg · 2% DV
Lemon (whole) Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
Is Lemon (whole) Processed?
NOVA 1
Unprocessed
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 Lemon (whole) Contain Allergens?
No known major allergens
Which Diets Is Lemon (whole) Good For?
Vegan
✓ Suitable
Vegetarian
✓ Suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
— Not suitable
Low FODMAP
— Not suitable
Lemon (whole) Fat Profile
SATURATED
0.04g
MONOUNSATURATED
0.01g
POLYUNSATURATED
0.04g
Omega 6:3 ratio 1.5:1
Below the ideal 4:1 — a good omega balance.
Foods Similar to Lemon (whole)
Lemon (whole) — Frequently Asked Questions
Does squeezing a lemon destroy its vitamin C right away?
No, not immediately, but vitamin C does decline with exposure to air, light, and time. Freshly squeezed juice is best used soon after preparation.
Does adding lemon to hot water cancel out its benefits?
Not completely, but very hot or boiling water can reduce some heat-sensitive compounds, including vitamin C. Warm rather than boiling water is usually the better choice.
Is lemon water okay on an empty stomach?
Many people tolerate it well, but it can trigger discomfort in those with reflux, gastritis, or a sensitive stomach. If that happens, dilute it more or have it with food.
Can lemon help lower the risk of kidney stones?
It may help some people because lemons provide citrate, which can reduce the formation of certain stones, especially calcium oxalate stones. It is not a substitute for medical care, though, and anyone with a history of stones should follow professional advice.
Can you eat the peel of a whole lemon?
Yes, the zest is commonly used in cooking and contains aromatic plant compounds. Wash the fruit well first, and use a trusted source if you plan to eat the peel regularly.
How long does a cut lemon keep in the fridge?
A cut lemon usually keeps best for a few days when wrapped or stored in a sealed container in the refrigerator. This helps prevent drying out and absorbing odors.
Can whole lemon be frozen?
Yes, you can freeze it whole, in slices, as zest, or as juice. The texture softens after thawing, so frozen lemon is usually best for drinks, sauces, and cooking rather than fresh garnish.
Does lemon help with iron absorption?
Yes, the vitamin C in lemon can improve absorption of non-heme iron from plant foods. Adding lemon to beans, lentils, or leafy greens is a practical way to support this.
Does lemon burn fat or cause weight loss on its own?
No, lemon itself does not directly burn fat. It can still be useful if lemon water replaces sugary drinks and helps you cut overall energy intake.
Can lemon juice damage tooth enamel?
Yes, frequent acid exposure can wear down enamel over time. Using a straw, rinsing with plain water afterward, and waiting before brushing can help reduce the risk.
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Nutrition data compiled from USDA FoodData Central and scientific sources.