I have not been able to find any scientific evidence that the seeds are bad for you. And I know for sure that people in South East Asia have been eating them for centuries.
You can either eat the individual seeds or eat the seed pods. The individual seeds have a nice nutty taste that is sweet at first, and then generate a "bitter" taste in your mouth. They are rich in vitamins and minerals, but very, very potent in the body. So, go easy on them, as they are potent cleansers. If you consider that Moringa seeds are intensely powerful purifiers that they can purify almost any water, to make it potable just think what it does to the water in your body! That’s right it purifies it. If you ingest too much of something that has a cleansing effect on your system it can generate some unpleasant, albeit not harmful, results such as diarrhea. Be sure to test them out slowly, to see how your body reacts to them.
Some ways that Moringa seeds can be eaten:
They can be "popped" like popcorn.
You can add them to soups, stews, casseroles, and sauces.
You can dry them, and add them to bread mixes, muffin mixes, or corn bread mix.
They can be fried in oil and salted.
They can be cooked in a little oil or butter, with other vegetables.
Boiled like peas, when they are very young.
Eating the Seed Pods
Also the seed pods from the Moringa tree are edible. Most people eat them when they are young but they can be eaten when they have matured they just need to be cooked longer. When they are very young about the size of green beans, or what you might call, "string beans" they are sweet, crisp, and very tasty! When they get much larger than that, they tend to have a "stringy" or "woody" texture to them. However, in many other countries, people do eat the pods when they are larger and seem to love the taste! Some grow straight, and some "curl up", but they are all edible.
Young seed pods that are about the size of a pencil you can eat them exactly as you would eat green beans. Try substituting Moringa seed pods in any dish that calls for green beans. You will also find that the baby Moringa seed pods are delicious all by themselves, eaten raw, right from the trees or they can be cooked and eaten as any other vegetable. You can add them to salads, chopped into little pieces, and thoroughly enjoyed the flavor and texture that they add.
They can also be eaten when they are a bit thicker, roughly the thickness of your thumb, but they require a longer cooking time, to be easy to eat. The older pods taste like fresh asparagus, and can be substituted for that vegetable, in recipes. You can also scrape the insides of the pods, after they have been cooked and add that to soups and stews.