Food · Vegetables · 茄果
Bell Pepper
茄科甜椒 · 红椒维 C 约 128 mg/100 g 超过橙子 · 三色都是同一植物不同成熟度 · 辣素几乎为零 · 脂溶性类胡萝卜素配油吸收翻倍
Story path
- 1What bell pepper is · the color secretWhat bell pepper is · the color secret
- 2Vitamin C champion · higher than orangeVitamin C champion · higher than orange
- 3Capsanthin · fat-soluble · needs fat to absorbCapsanthin · fat-soluble · needs fat to absorb
- 4What it lacks · how to pairWhat it lacks · how to pair
- 5How to choose · how to cookHow to choose · how to cook
Chapter 1
What bell pepper is · the color secret
What bell pepper is · the color secret
Bell pepper (Capsicum annuum) and hot chili pepper are the same species, selectively bred to remove the pungency gene. The four colors — red, yellow, orange, green — are not four different plants; they are the same fruit harvested at different stages of ripeness:
Green = unripe; lowest cost, fastest to marketYellow and orange = partially ripe; sweeter, more carotenoidsRed = fully ripe; spent the longest time on the vine, hence the highest price
Ripeness matters for nutrition: fully ripe red pepper has far more vitamin C and carotenoids than green. And capsaicin? Bell peppers contain negligible amounts — almost no heat. That pungency was bred out of this variety while the hot chili took the other route.
Green = unripe; lowest cost, fastest to marketYellow and orange = partially ripe; sweeter, more carotenoidsRed = fully ripe; spent the longest time on the vine, hence the highest price
Ripeness matters for nutrition: fully ripe red pepper has far more vitamin C and carotenoids than green. And capsaicin? Bell peppers contain negligible amounts — almost no heat. That pungency was bred out of this variety while the hot chili took the other route.
Chapter 2
Vitamin C champion · higher than orange
Vitamin C champion · higher than orange
Here's a comparison that often surprises people:
Raw red pepper: about 128 mg vitamin C / 100 gOrange: about 53 mg vitamin C / 100 gRaw green pepper: about 80 mg vitamin C / 100 g
Red bell pepper has roughly 2.4× the vitamin C of orange by weight. 'Vitamin C only comes from fruit' is a persistent myth — certain vegetables are in fact underrated, outstanding sources.
The adult DRI for vitamin C is about 75-90 mg (women/men); a small bowl of raw red pepper easily covers it. Vitamin C is water-soluble and heat-sensitive — light stir-frying or eating raw retains the most.
What else? Decent vitamin B6, some folate, and about 2 g/100 g dietary fiber. Very low calorie (~31 kcal/100 g), mostly water.
Raw red pepper: about 128 mg vitamin C / 100 gOrange: about 53 mg vitamin C / 100 gRaw green pepper: about 80 mg vitamin C / 100 g
Red bell pepper has roughly 2.4× the vitamin C of orange by weight. 'Vitamin C only comes from fruit' is a persistent myth — certain vegetables are in fact underrated, outstanding sources.
The adult DRI for vitamin C is about 75-90 mg (women/men); a small bowl of raw red pepper easily covers it. Vitamin C is water-soluble and heat-sensitive — light stir-frying or eating raw retains the most.
What else? Decent vitamin B6, some folate, and about 2 g/100 g dietary fiber. Very low calorie (~31 kcal/100 g), mostly water.
Chapter 3
Capsanthin · fat-soluble · needs fat to absorb
Capsanthin · fat-soluble · needs fat to absorb
The vivid color in red and orange bell peppers comes from two classes of fat-soluble carotenoids:
Capsanthin: the main pigment unique to red/orange peppers, a fat-soluble antioxidantBeta-carotene: a provitamin A that can be converted on demand into retinol in the body
The key point: fat-soluble pigments need fat to be efficiently absorbed. A direct RCT (Brown et al., 2004) showed carotenoid absorption from salad was significantly higher with full-fat versus low-fat dressing.
Practical implication: toss your bell-pepper salad with olive oil, or eat peppers with eggs or meat, and you use those carotenoids much more than eating them plain or with fat-free foods.
Green bell pepper? Still unripe, with very little capsanthin — the green comes from chlorophyll; vitamin C is decent but notably lower than red.
Capsanthin: the main pigment unique to red/orange peppers, a fat-soluble antioxidantBeta-carotene: a provitamin A that can be converted on demand into retinol in the body
The key point: fat-soluble pigments need fat to be efficiently absorbed. A direct RCT (Brown et al., 2004) showed carotenoid absorption from salad was significantly higher with full-fat versus low-fat dressing.
Practical implication: toss your bell-pepper salad with olive oil, or eat peppers with eggs or meat, and you use those carotenoids much more than eating them plain or with fat-free foods.
Green bell pepper? Still unripe, with very little capsanthin — the green comes from chlorophyll; vitamin C is decent but notably lower than red.
Chapter 4
What it lacks · how to pair
What it lacks · how to pair
Bell pepper's vitamin C and carotenoids are outstanding, but it's not complete:
What it lacks:
No vitamin B12 or DVery little iron, and it's non-heme (poorly absorbed)Almost no fat (meaning fat-soluble nutrients need to come from a pairing)Very little calciumMinimal protein
Pairing logic:
With fat (cooking oil, olive oil, nuts): boosts capsanthin and beta-carotene absorptionWith iron-rich foods (lean meat, legumes, grains): bell pepper's vitamin C significantly improves non-heme iron absorption from plant sources eaten in the same meal — a few pepper slices alongside tofu or beans is a practical iron-upgrade trickWith quality protein (eggs, fish): fills the protein and B12 bell pepper lacks
Bell pepper has almost no antinutrients to worry about and nothing that needs to be specially limited. It's one of the safest, most freely eaten vegetables for almost everyone.
What it lacks:
No vitamin B12 or DVery little iron, and it's non-heme (poorly absorbed)Almost no fat (meaning fat-soluble nutrients need to come from a pairing)Very little calciumMinimal protein
Pairing logic:
With fat (cooking oil, olive oil, nuts): boosts capsanthin and beta-carotene absorptionWith iron-rich foods (lean meat, legumes, grains): bell pepper's vitamin C significantly improves non-heme iron absorption from plant sources eaten in the same meal — a few pepper slices alongside tofu or beans is a practical iron-upgrade trickWith quality protein (eggs, fish): fills the protein and B12 bell pepper lacks
Bell pepper has almost no antinutrients to worry about and nothing that needs to be specially limited. It's one of the safest, most freely eaten vegetables for almost everyone.
Chapter 5
How to choose · how to cook
How to choose · how to cook
Choosing: look for taut, glossy skin with full even color and a firm feel. Soft or wrinkled skin means water has already been lost.
Which color: for vitamin C and carotenoids, prefer red > orange/yellow > green. Green peppers cost less and still offer good vitamin C (~80 mg/100 g) — just fewer carotenoids. Economically, green is perfectly worthwhile.
Cooking notes:
Raw / light salad: best for vitamin C retention (vitamin C is heat- and water-sensitive); just remember to add fat for carotenoidsQuick stir-fry: some vitamin C loss but still substantial retention; carotenoids are heat-stable and are actually better absorbed from stir-fried peppers thanks to the cooking oilLong simmering or boiling: greatest vitamin C loss (water-soluble leaches out); carotenoids move into the cooking liquid, so drinking the soup still captures them
Storage: whole peppers keep 1-2 weeks in the refrigerator crisper; once cut, eat quickly — vitamin C oxidizes and degrades faster after cutting.
Which color: for vitamin C and carotenoids, prefer red > orange/yellow > green. Green peppers cost less and still offer good vitamin C (~80 mg/100 g) — just fewer carotenoids. Economically, green is perfectly worthwhile.
Cooking notes:
Raw / light salad: best for vitamin C retention (vitamin C is heat- and water-sensitive); just remember to add fat for carotenoidsQuick stir-fry: some vitamin C loss but still substantial retention; carotenoids are heat-stable and are actually better absorbed from stir-fried peppers thanks to the cooking oilLong simmering or boiling: greatest vitamin C loss (water-soluble leaches out); carotenoids move into the cooking liquid, so drinking the soup still captures them
Storage: whole peppers keep 1-2 weeks in the refrigerator crisper; once cut, eat quickly — vitamin C oxidizes and degrades faster after cutting.