Is Lemon keto?
Keto in moderation 3.1 g net carbs per juice of one lemon (48 g) — 16% of a 20 g keto day.
Short answer: In moderation. Juice of one lemon (48 g): 3.1 g net carbs — 16% of a strict 20 g keto day — with 0.1 g fat and 0.5 g protein.
Log lemon in KetoraFree. Weigh it once and Ketora remembers your portion.
Nobody eats lemons by the 100 g, so the per-weight figure overstates their impact. The juice of a whole lemon adds only a few grams of carbs to a dish.
How lemon fits a keto carb budget
On a 20 g day you could eat about 6.4 servings before reaching the limit — in practice lemon will never be what pushes you over.
Worked example. 48 g of lemon = 4.5 g total carbs − 1.3 g fibre = 3.1 g net carbs, 0.1 g fat, 0.5 g protein and 14 kcal.
Portion is everything here. Weigh it the first few times, and use the keto macro calculator to see how much room your own carb budget leaves.
Nutrition facts
| Nutrient | Per 100 g | Per juice of one lemon (48 g) |
|---|---|---|
| Calories | 29 kcal | 14 kcal |
| Fat | 0.3 g | 0.1 g |
| Protein | 1.1 g | 0.5 g |
| Total carbohydrate | 9.3 g | 4.5 g |
| Fibre | 2.8 g | 1.3 g |
| Net carbs | 6.5 g | 3.1 g |
Where the energy comes from:
How to eat lemon on keto
- Lemon juice in water helps some people drink more during the first keto week.
Keto recipes with lemon
- Garlic Butter Cauliflower Rice
- Zucchini Noodles with Garlic and Parmesan
- Lemon Butter Salmon with Asparagus
- Keto Chicken Tikka
- Keto Tuna Salad
- Keto New York Cheesecake
- Keto Lemon Bars
Compared with other fruits
Lemon ranks #7 of 15 fruits in our database by net carbs per 100 g (lowest first). Berries and avocado fit; most sweet fruit uses a whole day of carbs in one serving.
| Food | Net carbs / 100 g | Per serving |
|---|---|---|
| Avocado | 1.8 g | 1.3 g |
| Olives | 3.1 g | 1.4 g |
| Blackberries | 4.3 g | 3.1 g |
| Raspberries | 5.4 g | 3.3 g |
| Strawberries | 5.7 g | 5.1 g |
| Coconut (fresh flesh) | 6.2 g | 2.8 g |
See all fruits ranked by net carbs →
Frequently asked questions
How many net carbs are in lemon?
Lemon has about 6.5 g of net carbs per 100 g (9.3 g total carbohydrate minus 2.8 g fibre), and about 3.1 g per juice of one lemon (48 g).
Can you eat lemon on keto?
In measured portions. One juice of one lemon uses about 16% of a 20 g day, so plan the rest of the day around it.
Values are per 100 g of the raw or stated food, rounded, from USDA FoodData Central. Brands and varieties differ — check the label for packaged products.