A couple of thoughts:
Have some of you read the ingredients and the nutritional info on a package of fake meats? (major, widely available brands). Consuming fake meats on a regular basis certainly is not healthy. Occasional consumption is not ideal, and is really a trade off of convenience.
What PTree15 said, plus:
Most of us are old enough to make these decisions for ourselves, don't you think? After all, they affect only ourselves. Perhaps we should look over your shoulder and scrutinize and comment on your eating, exercise, sleeping, etc. habits. I'm sure that you would appreciate it just as much as we do.
On a number of occasions over the years, I've heard numerous vegans state that they didn't care about health, and that they were in it for the animals. But consider this, the healthier you are, the longer you may live, which means you'll have more time to advocate for animals.
This argument puzzles me every time I hear it. Even the most conscientious vegan among us is responsible, daily, for the deaths of animals. Some of us are Jane Goodall, who probably has a larger beneficial impact than her negative one. Most of us are not Jane Goodall.
Vegans in general (both inside and outside the community), are viewed as snotty and uppity - regardless of their motivations....
Oh, the irony.
Abusing your body at 25 is usually no big deal, but you often pay the price beginning in your mid thirties...trust me.
Are you really trying to say that you can stave off the changes that come with the years by eating right and exercising? I'd really like to see you provide proof for that.
At one time, I could pull an all nighter and function completely normally the next day, and go to bed at midnight that next day. I would do that 2-3 times a week, because I was carrying a lot of credit hours. Then, from one week to the next, while I was in graduate school, that became next to impossible. Likewise, at 61, I can still carry 50 pound bags of feed, but I have to pace myself. Those are inevitable changes that come with the years.
Health is a combination of the luck of the draw, gene-wise, and not being completely stupid with how you treat your body. If it were otherwise, there wouldn't be health freaks dropping dead before old age and alcoholics living to 90.
Another potential member bites the dust...
What percentage of people who post on here a couple of times stick around, even if they are greeted with nothing but hugs? Pretty damn low, I would say.
And also, again...the irony.