I can't recommend any brand. The research is weak regarding oral collagen supplements. I'm planning to switch to vitamin C infused gelatin, as there's some rese

I can't recommend any brand. The research is weak regarding oral collagen supplements. I'm planning to switch to vitamin C infused gelatin, as there's some research backing that up. https://www.ncbi.nlm.nih.gov/pubmed/27852613 https://www.ncbi.nlm.nih.gov/pubmed/27852613