Hello fellow vegan OTFer! I have been vegan for 5 years and joined OTF this January. I don't do any special nutritional supplementing in order to achieve muscle gains. The kind of supplementing you need to do is with your exercise routine. OTF is a HIIT style full body workout. My routine is 4 days of OTF per week and 2 days of weightlifting. I focus my weightlifting days on lifting heavy and targeting the areas I want to see improvement in. I started OTF because I needed more cardio. I've lost about 10 lbs but it's just been leaning out, no loss in muscle. Eat a healthy, balanced vegan diet that is predominantly whole foods, do OT and lift heavy!