The conversation between human and AI assistant.
Should I use a mass gainer or protein?
Which one would you recommend for someone who is skinny and trying to gain muscle mass?
For someone who is skinny and trying to gain muscle mass, a mass gainer may be more appropriate as it provides additional calories necessary for weight gain. However, it is important to consult with a nutritionist before starting either supplement to ensure that it fits with your specific dietary needs and goals.