💎 Key Nutrients
What Is Fish, Grouper? Origin and Varieties
Groupers are a diverse group of reef‑associated fish belonging to the subfamily Epinephelinae (Serranidae) that inhabit tropical and subtropical waters globally. They are prized for their firm texture and mild flavor, making them a staple in many culinary traditions from the Caribbean to Southeast Asia. Unlike species such as salmon or tuna, grouper is classified as a lean, white fish with relatively low total fat. Commercially available grouper can consist of multiple species, hence the term "mixed species" used in culinary and USDA descriptions. These may include species like Epinephelus morio (red grouper) and Mycteroperca species among others, each contributing similar nutritional characteristics relevant to this cooked form. (Springer Groupers are typically caught wild or raised in aquaculture systems in Asia and the Pacific where they are among the most economically valuable finfish due to fast growth rates and firm meat quality. Historically, grouper has been valued by coastal communities for both food and trade; its large size and rich protein content made it a luxury in markets and regional cuisines. (Springer The mixed‑species designation reflects market practices where exact species identification is often not feasible at point of sale; what remains consistent is nutrient density and culinary use. Cooked grouper, especially when prepared by dry heat methods like baking or grilling, retains most of its protein and micronutrients and is versatile in global cuisines from grilled fillets to stews and ceviches.
Nutrition Profile: A Detailed Breakdown
According to USDA data, a 202 g cooked fillet of fish grouper yields ~238 kcal, dominated by protein (~50.2 g), with minimal fat (~2.6 g) and negligible carbohydrates. (My Food Data This macronutrient distribution highlights grouper as an exceptionally lean source of high‑biological‑value protein, providing all essential amino acids necessary for muscle synthesis and repair. It’s particularly rich in lysine, leucine, and methionine — amino acids key for tissue maintenance. (Nutrition Data List While not as rich in total fat or omega‑3s as oily fish (like salmon or mackerel), it still contributes DHA and EPA in modest amounts, supporting cellular function and brain health. (WhatYouEat On micronutrients, cooked grouper is notable for selenium — surpassing 170% of daily needs in a single fillet — a trace mineral acting as a potent antioxidant cofactor that supports immune and thyroid function. (Nutrition Data List Additionally, it offers vitamin B‑12 (~58% DV), critical for nerve health and red blood cell formation, and vitamin B‑6 (~42% DV), which aids metabolic processes. Potassium (~960 mg) supports electrolyte balance and blood pressure regulation. (My Food Data Compared to similar lean white fish like cod or tilapia, grouper’s nutrient density is comparable in protein but slightly higher in minerals like selenium and iron, making it a nutrient‑dense option for diets prioritizing lean protein with micronutrient support.
Evidence‑Based Health Benefits
Eating fish regularly has been associated with multiple health benefits across large epidemiological studies. Broad scientific reviews show that regular fish consumption (≥2 servings weekly) correlates with a reduced risk of cardiovascular disease, improved blood lipid profiles, and lower inflammation. (科学直接 These benefits are largely attributed to long‑chain omega‑3 fatty acids (EPA and DHA), which influence vascular function, platelet aggregation, and triglyceride levels. (Mayo Clinic Even though grouper is not among the highest omega‑3 sources, it does provide measurable DHA and EPA that contribute to this effect. (WhatYouEat The protein in grouper supports muscle maintenance, especially in active individuals and older adults whose protein needs are elevated to preserve lean mass. High‑quality protein intake is linked to improved satiety, weight management, and metabolic health. (Frontiers Additionally, selenium in grouper functions as part of glutathione peroxidase enzymes, supporting the body’s antioxidant defenses and potentially reducing oxidative stress. (Nutrition Data List Vitamin B‑12 aids neurological function and, in combination with folate and B‑6, helps regulate homocysteine metabolism, a marker associated with cardiovascular risk when elevated.
Potential Risks and Who Should Be Careful
While fish overall offer many nutritional benefits, certain risks require attention. One key concern with many predatory fish, including grouper, is their moderate mercury content. According to FDA and EPA joint advice, fish like grouper can contain mercury at levels placing them in a moderate exposure category, meaning consumption should be balanced and not excessive. Mercury, particularly methylmercury, is a neurotoxin that bioaccumulates in larger predatory fish. High methylmercury exposure during pregnancy and early childhood can impair nervous system development. (Nutri Thus, populations such as pregnant or breastfeeding women and young children are advised by FDA/EPA guidelines to limit intake of moderate‑mercury fish and choose lower‑mercury options more frequently. (U.S. Food and Drug Administration Allergies to fish and shellfish are another consideration; even lean fish like grouper can trigger severe IgE‑mediated reactions in susceptible people, so avoidance is necessary if allergic symptoms occur. Additionally, individuals with gout or certain kidney conditions may need to monitor high‑protein diets to avoid exacerbating symptoms, though specific guidance should come from a healthcare provider.
❤️ Health Benefits
Supports heart health
Long‑chain omega‑3s (EPA/DHA) from fish help reduce triglycerides and inflammation and improve blood vessel function
Evidence: strong⚖️ Comparisons
Vs. Salmon
Higher omega‑3 content but more fat than grouper
🧊 Storage Guide
❄️
Fridge
1–2 days raw; 3–4 days cooked
🧊
Freezer
2–3 months
⚠️ Signs of
Spoilage:
- smell: strong fishy or sour smell
- visual: dull color, slimy film
- texture: sticky or mushy surface
- when to discard: any off‑odor or sliminess
👥 Special Considerations
elderly
Why: High protein supports sarcopenia prevention
Recommendation: Include as lean protein for muscle support
athletes
Why: High‑quality protein aids recovery
Recommendation: Include post‑exercise for protein rebuilding
children
Why: Developing nervous system vulnerability
Recommendation: Small portions; refer to local advisories
pregnancy
Why: To reduce mercury exposure while gaining nutrients
Recommendation: Eat limited servings (max ~2/week from moderate mercury fish)
breastfeeding
Why: Mercury can transfer to infant
Recommendation: Limit intake similar to pregnancy guidelines
🔬 Detailed Nutrition Profile (USDA)
Common Portions
1.00 fillet
(202.00g)
3.00 oz
(85.00g)
| Nutrient | Amount | Unit |
|---|---|---|
| Water | 73.3600 | g |
| Energy | 118.0000 | kcal |
| Energy | 494.0000 | kJ |
| Protein | 24.8400 | g |
| Total lipid (fat) | 1.3000 | g |
| Ash | 1.4100 | g |
| Carbohydrate, by difference | 0.0000 | g |
| Fiber, total dietary | 0.0000 | g |
| Calcium, Ca | 21.0000 | mg |
| Iron, Fe | 1.1400 | mg |
| Magnesium, Mg | 37.0000 | mg |
| Phosphorus, P | 143.0000 | mg |
| Potassium, K | 475.0000 | mg |
| Sodium, Na | 53.0000 | mg |
| Zinc, Zn | 0.5100 | mg |
| Copper, Cu | 0.0450 | mg |
| Manganese, Mn | 0.0120 | mg |
| Selenium, Se | 46.8000 | µg |
| Vitamin C, total ascorbic acid | 0.0000 | mg |
| Thiamin | 0.0810 | mg |
| Riboflavin | 0.0060 | mg |
| Niacin | 0.3810 | mg |
| Pantothenic acid | 0.8700 | mg |
| Vitamin B-6 | 0.3500 | mg |
| Folate, total | 10.0000 | µg |
| Folic acid | 0.0000 | µg |
| Folate, food | 10.0000 | µg |
| Folate, DFE | 10.0000 | µg |
| Vitamin B-12 | 0.6900 | µg |
| Vitamin A, RAE | 50.0000 | µg |
| Retinol | 50.0000 | µg |
| Vitamin A, IU | 165.0000 | IU |
| Fatty acids, total saturated | 0.2990 | g |
| SFA 14:0 | 0.0250 | g |
| SFA 16:0 | 0.1400 | g |
| SFA 18:0 | 0.0590 | g |
| Fatty acids, total monounsaturated | 0.2680 | g |
| MUFA 16:1 | 0.0260 | g |
| MUFA 18:1 | 0.0860 | g |
| Fatty acids, total polyunsaturated | 0.4030 | g |
| PUFA 18:2 | 0.0180 | g |
| PUFA 20:4 | 0.0570 | g |
| PUFA 20:5 n-3 (EPA) | 0.0350 | g |
| PUFA 22:5 n-3 (DPA) | 0.0170 | g |
| PUFA 22:6 n-3 (DHA) | 0.2130 | g |
| Cholesterol | 47.0000 | mg |
| Tryptophan | 0.2780 | g |
| Threonine | 1.0890 | g |
| Isoleucine | 1.1450 | g |
| Leucine | 2.0190 | g |
| Lysine | 2.2820 | g |
| Methionine | 0.7350 | g |
| Cystine | 0.2660 | g |
| Phenylalanine | 0.9700 | g |
| Tyrosine | 0.8390 | g |
| Valine | 1.2800 | g |
| Arginine | 1.4870 | g |
| Histidine | 0.7310 | g |
| Alanine | 1.5030 | g |
| Aspartic acid | 2.5440 | g |
| Glutamic acid | 3.7090 | g |
| Glycine | 1.1930 | g |
| Proline | 0.8780 | g |
| Serine | 1.0140 | g |
Source: USDA FoodData Central (FDC ID: 171963)
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