Always been underweight

I'm sorry you are going through this. I understand. I have a malabsorption disorder. But, there are many different types, causes, reasons, etc. It helps to work with a health professional. And to find out if there is an underlying reason (condition).

First thing is first, be patient. I can relate, let's keep it simple for now and say

if you aren't gaining any weight, it's because you are burning more calories than you are eating. Increase your calories slowly, the goal isn't to get fat.

Can you post your current diet, and if you workout, how many days you workout and cardio?
How many calories are you eating?

Take a look at this, find your TDEE, the link will be provided, now this is an estimate of how many calories you burn each day. To gain weight you want to eat above this number. If your TDEE is around 2000, try adding 350 calories to your daily marker and check your weight every week. If no weight is gained try adding another 150 to each day and check weight after week.

(Coming from someone who use to be very very skinny/anorexic) Feel free to friend me, and message. I don't mind helping

TDEE Calculator http://www.sailrabbit.com/bmr/

You really need the help of a RD, and not just a nutritionist because anyone can call themselves that, If you are having medical issues with food and not gaining then it's best left to a professional rather than a random fitness board. Good luck to you.

Just because your a vegan doesn't mean you can't gain weight please don't give up!!!
Try adding healthy fats to your diet. Ex: nautral peanut or almond butter, avocados, olive oil, and nuts. You can also start swapping fresh fruit for dried because dried has a lot more calories but still has the nutrients.
You can also drink almond or coconut milk. That way you still get plenty of calcium.

sarahi_jesus wrote: »

I have also been trying to gain weight myself.. A few years back I lost the little weight I had due to depression and since then couldn't gain in back. Now I'm 90lbs and struggling to gain back my weight and tried doctors but keep telling me I'm ok,it's just my fast metabolism

Nobody has a "fast" metabolism.

ItsyBitsy246 wrote: »

trigden1991 wrote: »

sarahi_jesus wrote: »

I have also been trying to gain weight myself.. A few years back I lost the little weight I had due to depression and since then couldn't gain in back. Now I'm 90lbs and struggling to gain back my weight and tried doctors but keep telling me I'm ok,it's just my fast metabolism

Nobody has a "fast" metabolism.

Can you clarify this? If I weigh the same as my friend (and all other things being equal), but I have much more lean muscle, wouldn't I burn through a given amount of calories quicker than her (metabolize faster)? I thought that was one of the points of recomping- lean muscle requires more energy than fat to maintain. Not trying to hijack this thread, this is just point of confusion for me when reading the forums. Feel free to just link me to another post that explains how these things jive together (lean muscle vs fat, and no "fast metabolisms"). Thanks!

I guess it depends by what you mean by "fast" but metabolisms do have a variance just like anything else. Variance for BMR is about 6-8% so an outlier could be over 16% faster or slower but that's a very small portion of the population and likely due to medical conditions.

Extra muscle actually doesn't raise metabolism by very much but the exercise involved in adding and maintaining it certainly burns a lot of calories.

Here's a link to get you started https://examine.com/nutrition/does-metabolism-vary-between-two-people/

My guess would be that it's more likely to be about malabsorption than a fast metabolism. But are you logging what you're eating? The simplest explanation is just that you're under eating.

Btw, I have IBS issues from time to time, so malabsorption is a problem for me (including any medications), but I GAIN weight during these bouts. I gain because I load up on sugary fatty carbs. Short term it boosts my nonexistent energy levels and a belly full of fatty carbs feels good. Scrapey foods like fruits and vegetables, are a no no.

Nutrition is important of course, but just increasing volume of calories might help.