The Seagan Diet

Goal: to eat sustainably and healthy

Be aware: this is only the goal of this diet, not necessarily its outcome. Results vary from person to person. Consult your doctor or dietician before starting this (or any other) diet.

Seagan diet

Seagan is an amalgamation of the terms 'veganism' and 'seafood'. The vegan diet forms the basis of the Seagan diet (or Seaganism). This is combined with eating sustainably sourced seafood and fish.

On the homepage you can compare the Seagan diet with other diets.

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The vegan diet as a basis

The vegan diet is a diet that does not include any animal products. So, you don't eat meat and fish, but also no products produced by animals, such as honey, eggs and dairy products. Read more about the vegan diet here.

The Seagan diet is not completely vegan as it does include fish and seafood.

Fish and seafood

The idea of consuming fish and seafood in the Seagan diet is that it is difficult to avoid deficiencies in a vegan diet. This includes deficiencies in vitamin B12 and omega-3 fatty acids. According to the inventors of this diet, this can be solved by eating fish and seafood in addition to the vegan diet.

Sustainable & environmentally aware

Important aspects of the Seagan diet are sustainability and awareness about the environment. It is emphasised that consuming too much fish and seafood is bad, as fishing has a negative impact on the environment. Hence, when buying these products, sustainably sourced fish and seafood should be picked. 

Be aware

Consult your doctor or dietician before starting this (or any) diet.

Seagan eating book

Amy Cramer and Lisa McComsey wrote the book 'Seagan eating' about the Seagan diet. The book contains plant-based recipes, possibly with fish or seafood.

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Similar diets

The diet is very similar to the pescetarian diet. Here a vegetarian diet is combined with eating fish, shellfish and crustaceans. Pescotarian is a combination of the terms Persce (Italian voos fish) and vegetarian. The diet can also be compared to the plant-based diet and the flexitarian diet.

Examples of diets that are also considered sustainable are PureHealth and the Nordic diet.

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  • Plant-based products
  • Fish (not too much)
  • Seafood (not too much)

Not allowed

  • Meat
  • Animal products (excl. fish/seafood)
  • Dairy products
  • Eggs
  • Honey


  • Sustainable diet
  • Eating healthier


As you see fit

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With the professional help of a dietitian it should be easier to reach your goals. Please contact a dietician in your area or talk to a doctor before starting any diet.

General warnings

Please take note that most diets do not have a scientific basis.

Consult your doctor or dietician before starting a diet, especially if you have a chronic condition like diabetes, cardiovascular disease, lung disease or kidney disease.

Eating disorders

If you think you might have an eating disorder (like anorexia or bulimia), it is important to look for professional help. Contact your (house) doctor or find help elsewhere. Here you can find a list of several websites that can provide (online) help. These sites also provide information for people that know someone with an eating disorder.