hey Marc, I want to try different flavors of your whey protein. just afraid to spend the money and end up not liking it. is there any way you can get it to when we order one of your mts whey protein, that we could pick another flavor in a one serving sample pack?

Does it matter how many carbs for the day I take in pre-workout? For example, is having about 30-40g of carbs sufficient before I workout and then eating all the rest of my carbs for the day afterward? Or should I eat at least half of my daily intake of carbs for the day before working out? What is suggested? 

What movements would you recommend to help prevent a lower back injury from squats and deadlifts? About 5 years ago I pulled my back (lower right part of my back to be specific) during a bent over row. Fast forward a few years, pulled the same muscle performing deadlifts, fast forward to today, did it when i was coming up from a squat. Just before I squated today, I performed Marc's pillar prep like I do every day for the past few months. This was also while warming up at a weight of 225. I also don't want to become dependent on a belt.

Do you have any tips on how to get rid of and prevent stretch marks from lifting?