Yep , eat more first if you want to gain weight. Once you got that going then I would start creatine. The thing about v-12 turbo is that people who are resistant to regular monohydrate creatine might respond to v-12 turbo ... Im like that , I dont respond to regular creatine monohydrate. But I would still start off with monohydrate if I were you . Oh ya , and drink lots of water.