Pescatarian Diet: Fish, Plants and the Numbers

The word combines pesce, the Italian for fish, with vegetarian. It keeps vegetables, fruit, grains, legumes, dairy and eggs, adds fish and shellfish, and leaves out meat and poultry. Compared with vegetarian eating, it gives you a compact, complete protein that does not rely on dairy.

The Dietary Guidelines for Americans list seafood as a regular part of its example patterns, and the Mediterranean pattern uses a similar balance of fish and plants.

Fish divides cleanly into lean and oily. White fish such as cod is very high in protein for its calories, while salmon and sardines carry a larger fat share and so more energy per bite. Canned fish adds a third variable, the oil or brine in the tin.

That spread is useful when counting. A lean fish dinner leaves room for rice or potatoes, an oily fish dinner uses the fat budget, and the table below shows how large the gap is per 100 g.

A fish-centred week is easy to plan around a few anchors: oily fish once or twice, white fish or shellfish for lighter evenings, and eggs or legumes on the other days. Frozen and tinned fish keep the cost down.

Shellfish and small fish are the quickest dinners, since shrimp or a tin of sardines needs minutes rather than an oven. Keeping a few of them in the cupboard or freezer means a meat-free evening never has to start from scratch, and the log entry is one line.

Cooking method matters for the log. Grilling, baking and steaming add little, whereas breadcrumbs and frying add calories that a photo estimate may miss.