I would add a shitload of Vit C and if you really are looking to add more you won't go wrong with adding 325mg of magnesium a few times a day and 20mg Zinc at night right before bed.

If you want, you could swap out the multi for a greens drink too but we may start splitting hairs with that.

Lastly, Creatine is awesome, 100% safe and will do wonders for you in the gym over a long period of time. Without a doubt it's probably the most tested and true supplement that works for everyone when taken properly.