Depends on species and nutritional requirements. For tigers or seals none.

There are so many types of vegetarianisms !

Above picture from the below website:

https://boyversusworld.com/tips-to-become-vegetarian/

A balanced vegetarian diet can meet all your daily nutritional needs through thoughtful food choices. The key is to consume a variety of plant-based foods to cover essential nutrients like proteins, vitamins, and minerals.

Breakfast should include whole grains like oats or quinoa, prepared with fortified plant milk (such as almond, soy, or oat milk). These grains provide energy, fiber, and important vitamins like B-complex, while the fortified milk adds calcium and vitamin D. Adding nuts and seeds like chia, flax, or walnuts supplies healthy fats, including omega-3 fatty acids, and proteins. Fresh fruit such as berries or bananas can boost vitamin C and antioxidants, which support immunity and skin health.

For a mid-morning snack, consider a smoothie made from leafy greens (spinach or kale), a banana, and an apple, blended with water or fortified plant milk. This combination provides fiber, vitamin A, vitamin K, and vitamin C, which enhances iron absorption from the greens. You can add a scoop of plant-based protein powder if you need an extra protein boost, especially important for vegetarians.

Lunch should be hearty and nutrient-dense, ideally based on a salad with diverse vegetables. A mix of leafy greens, carrots, cucumbers, and cherry tomatoes provides vitamins A, C, and K, along with folate and fiber. Adding a protein-rich component like lentils, chickpeas, or beans (one cup) ensures you get sufficient protein, iron, and fiber. Pairing these with a whole grain like quinoa, brown rice, or couscous adds magnesium, B vitamins, and complex carbohydrates for sustained energy. For dressing, a blend of olive oil, lemon juice, and tahini gives healthy fats, vitamin E, and calcium.

In the afternoon, a snack of hummus with vegetable sticks (like carrots or bell peppers) provides fiber, protein, and folate. Adding a piece of fruit, such as an apple or a pear, further increases your intake of fiber and antioxidants, supporting digestive and heart health.

Dinner can feature a vegetable stir-fry with nutrient-dense vegetables like broccoli, bell peppers, and zucchini, lightly cooked in olive or avocado oil. Adding tofu or tempeh, a protein source high in calcium and iron, balances the meal. Pair with a whole grain or root vegetable, such as brown rice or sweet potato, for additional fiber, potassium, and magnesium.

A small evening snack could include fortified plant-based yogurt with nuts or berries. This snack provides probiotics, calcium, vitamin B12 (if fortified), and protein. A small amount of dark chocolate (70% cocoa or higher) can be enjoyed as a treat, offering iron, magnesium, and antioxidants.

Since vitamin B12, vitamin D, and omega-3 fatty acids can be harder to obtain from a vegetarian diet, supplements are often recommended. A B12 supplement (500–1,000 mcg weekly) is essential, especially for those on a strict vegetarian diet. If sunlight exposure is limited, a vitamin D supplement is also beneficial. Omega-3s can be sourced from algae-based supplements if needed.

This balanced vegetarian diet, rich in whole foods like grains, vegetables, legumes, nuts, and seeds, provides all essential nutrients for optimal health. With mindful planning, a vegetarian diet can meet all dietary requirements while promoting wellness and reducing environmental impact.