What can you take to gain weight please send me a list of vitamins i have been slim my whole 42 years lol?

Most vitamins end up in your pee by the end of the day and they will do little unless your vitamin deficient. A visit with a clinical dietitian, usually found a larger hospitals or medical schools, can help you define what your diet provides and whether any deficiency would be likely. Blood test can confirm deficiency. You can then plan a good diet to gain weight.

If One has been "slim my whole 42 years" then most likely, that is One's "Normal Nature". One should also see if other members of her Family are "slim" also. At 42 years, considered as beginning of mid-life when many people naturally put on weight, it might not be a very good idea to "load it up" so to speak as issues of Heart Problems and Joint Discomfort might arise to create new challenges!

If you are otherwise healthy, being skinny/slim is not a cause for concern. You are likely to gain fat by eating more and add problems for your health. If your BMI is not below 18, leave it alone. For BMI calculator: https://www.nhlbi.nih.gov/health/educational/lose_wt/BMI/bmicalc.htm