What product do I need to purchase to gain more weight/mass?

You will need to be on a caloric surplice to gain weight, Which means you have to take in more than you burn.

So below are some products which can help you gain weight /mass

• Mass Gainers https://www.xtraprotein.com/?s=Mass+gainers&post_type=product&type
• Creatine https://www.xtraprotein.com/?s=Creatine&post_type=product&type_aws=true
• Glutamine https://www.xtraprotein.com/?s=Glutamine&post_type=product&type_aws=true
• Protein https://www.xtraprotein.com/?s=Protein&post_type=product&type_aws=true

Please consult your doctor before taking any of the above