There are no good reasons to not become a vegan, but there are a few disadvantages in the practicality of strict veganism.

No commitment
Lack of commitment can be a problem with many people. This is especially a problem when making the switch to veganism. You will have to keep reminding yourself what you eat and don't eat. It may also help to not give up all non-vegan foods instantly. For example, become a vegetarian first, and then start removing dairy and egg products from your diet. An instant attempt to make a complete change, although a good idea if possible, can be hard and often causes people to give up completely and go back to their previous diet, deciding that they can't handle veganism. Remember, don't give up on veganism. Keep your commitment and it will be well worth the change.

Cost factor
The cost factor is important to consider. For a while, veganism will end up costing more. However, many people don't realize that in the long run you can save money on expensive medical bills and health problems by choosing veganism. Medical bills are expensive - and going up all the time. As explained more in Why vegan, becoming a vegan can great reduce or even eliminate those unnecessary costs. Of course, you might also be wondering "How much more do vegan foods costs?" The answer varies greatly, depending where you buy food and what you buy. For example, bread in a typical natural foods department or store can cost up to $5.00 or more (US dollars) if made in the store's bakery or another local bakery, but vegan bread for under $3.00 is also available and tastes great.

Right foods not available
Finding the right foods can be one of the greatest challenges of becoming a vegan. It can be much harder, though definitely not impossible, to eat out. Most restaurants and fast-food places will honor a request for vegan food. However, be sure they know what vegan food is - clearly state that you want no meat, dairy, or eggs products in your food. Parties or other social activities often provide non-vegan food. Generally, you'll be able to eat something though, and you may want to even bring your own food, if possible. Grocery stores that have a good health-food selection are rare, although gradually becoming more common. Check Where do you shop for food? to learn how to find a local natural foods store. With all these problems, many people have given up veganism. However there are solutions and minor impracticalities shouldn't turn you away from the many more advantages of veganism.

Works Cited