Type As are a bit more vegetarian (no red meat). Poultry is okay (considered a neutral food). Fish like cod, salmon trout which are beneficial foods.
Eggs are okay. Most dairy is out, but what you can have are neutrals, like yogurt, mozzarella, and feta, to name a few.
Most beans and legumes are beneficial for you. Avoid garbanzo, red, and navy beans. All soy is super beneficial.
The best nuts and seeds are flax, walnuts, and peanuts. Avoid Brazil nuts, cashews and pistachios. THe rest are neutral.
Beneficial grains are Wheat bread (sprouted commercial), soba noodles, rice cake, oat flour, essene bread, etc. Avoid teff, wheat bran, and wheat germ. Corn is iffy. Depends on how you feel and if you're a secretor or not (this applies to all foods.) The rest are pretty neutral.
Veggies: avoid potatoes, yucca, cabbage, capers, eggplant, shiitake mushrooms, olives, peppers, sweet potatoes, tomatoes, yams.
Fruits, avoid bananas, honeydew melon, oranges, plantain, coconut milk/coconut, mangos, papayas, tangerines.
For more details, go to:
TYPEbase4: Blood Type Diet Food Values
Hope this is helpful!