Lowest Sugar Fruits: 7 to Reach For
Short answer: The lowest-sugar fruits people actually eat include avocado (about 0.7 g sugar per 100 g), lemon (2.5 g), cranberry and raspberry (around 4 g), strawberry and blackberry (about 4.9 g) and watermelon (about 6.2 g). Tart citrus and berries stay low because they trade sweetness for acidity and fibre, which also slows sugar absorption. Compare that with grapes or mango, which run far higher. Choosing low-sugar, high-fibre fruit helps keep blood sugar steadier.
| 🥑 Avocado | 🍋 Lemon | ❤️ Cranberry | 💗 Raspberry | 🍓 Strawberry | 🖤 Blackberry | 🍉 Watermelon | |
|---|---|---|---|---|---|---|---|
| Taste | Rich, buttery, and grassy-nutty with almost no sweetness — closer to an ingredient than a dessert. Hass is creamy and concentrated; larger green-skinned types are lighter and more watery. | Intensely sour and clean, with bright pine-floral aromatics concentrated in the zest. Meyer lemons are noticeably sweeter and more perfumed, with a thin, fragrant skin. | Fiercely tart and astringent raw, with a bitter edge — nature's warhead. Cooked with sugar it transforms into a bright, complex sweet-sour with wine and citrus notes. | Intensely aromatic — floral, winey, sweet-tart — with a delicate, collapsing texture and gentle seed crunch. Black raspberries are deeper and jammier; golden ones milder and honeyed. | Bright, sweet-tart, and intensely aromatic — over 350 volatile compounds create the unmistakable strawberry perfume. Peak-season fruit is candy-like; off-season fruit trades flavor for size. | Deep, winey sweet-tart with earthy, almost woodsy notes and gentle tannin; fully ripe berries are lush, underripe ones sour and astringent. Bigger isn't sweeter — black and dull-matte is. | Crisp, watery, and cleanly sweet with a faint cucumber freshness (they're family). Yellow varieties add honey notes; the flesh nearest the seeds is the sweetest. |
| Type | Tropical & subtropical | Citrus | Berry | Berry | Berry | Berry | Melon |
| Peak season | Year-round, Summer | Winter, Year-round | Autumn | Summer, Autumn | Winter, Spring | Summer, Autumn | Summer |
| Origin | South-central Mexico and Central America, cultivated for ~10,000 years | Northeastern India/Myanmar region; a citron × bitter orange hybrid, spread via Persia and Arab trade | North American bogs; a staple of Indigenous foodways (pemmican) long before colonists | Temperate Eurasia (the species name honors Mount Ida); black raspberries are North American | Modern hybrid bred in 1750s France from North & South American wild species | Temperate Eurasia and North America — one of humanity's oldest foraged fruits | Northeastern Africa (Sudan/Kalahari region), cultivated in Egypt 4,000+ years ago |
| Calories (per 100 g) | 160 | 29 | 46 | 52 | 32 | 43 | 30 |
| Sugar (per 100 g) | 0.7 g | 2.5 g | 4 g | 4.4 g | 4.9 g | 4.9 g | 6.2 g |
| Vitamin C (per 100 g) | 10 mg | 53 mg | 13.3 mg | 26.2 mg | 58.8 mg | 21 mg | 8.1 mg |
| Fiber (per 100 g) | 6.7 g | 2.8 g | 4.6 g | 6.5 g | 2 g | 5.3 g | 0.4 g |
| Potassium (per 100 g) | 485 mg | 138 mg | 85 mg | 151 mg | 153 mg | 162 mg | 112 mg |
| Typical price | Mid | Budget | Mid | Premium | Mid | Mid | Budget |
If you’re watching sugar, the good news is that plenty of genuinely enjoyable fruits are naturally low in it. The figures in the table above come straight from each fruit’s nutrition data, sugar per 100 g, so you can see the ranking rather than take it on trust.
At the very bottom sits avocado (about 0.7 g) — botanically a fruit, barely sweet at all. Next come the tart citrus like lemon (2.5 g), which you use for acidity rather than snacking. The sweet spot for everyday eating is berries: cranberry and raspberry hover near 4 g, strawberry and blackberry around 4.9 g, all while carrying plenty of fibre. Watermelon (about 6.2 g) rounds out the list — low by weight because it’s mostly water.
The lesson isn’t just “less sugar” — it’s the fibre-to-sugar balance. Berries and tart citrus give you fibre and acidity alongside modest sugar, which slows absorption. For contrast, see how a sweeter fruit stacks up in apple vs grape, and for the flip side of the nutrition coin, fruits highest in vitamin C. This is general information, not medical or dietary advice.
One honest footnote: this list covers fruits eaten as fruit. Widen it to botanical fruits treated as vegetables and several go lower still — okra at about 1.5 g of sugar per 100 g, cucumber at 1.7 g, and olive at essentially zero. They are left off here because nobody reaches for them as a sweet snack, not because the numbers do not count.
Frequently asked questions
What is the lowest sugar fruit?
Among fruits people eat regularly, avocado is the lowest — under 1 g of sugar per 100 g — followed by tart citrus like lemon and lime. Berries such as raspberry, strawberry and blackberry are the lowest-sugar sweet fruits.
Why does fibre matter as much as sugar?
Fibre slows how fast sugar enters the bloodstream, so a fruit's fibre-to-sugar ratio matters more than sugar alone. Berries and tart citrus are high in fibre for their sugar, which is why they're good low-impact choices.
Is watermelon high or low in sugar?
By weight watermelon is fairly low in sugar (around 6 g per 100 g) because it's mostly water. Its glycaemic index is high, but a normal portion delivers modest total sugar, so it's a reasonable choice in moderation.