B-12 dosage question

[miltee_2000]

Im 18 years old 120lbs Im having trouble ganing weight so I went and bought some B-12 dots to help increase my appetite.they are 500mcg and you put them under your tongue and let them disolve.I need to know when to take them and how many. need help thanks

[nsa]

4000 mcg spread out throughout the day.

[miltee_2000]

how effective is this stuff

[nsa]

At that dose it is effective. If your looking to gain mass, you need to eat alot of protein.

[bigordie]

how effective is this stuff

very effective, you are gonna wanna eat non stop

[miltee_2000]

thanks for the help