Ultimately, the ideal choice depends on your personal goals and what you’re looking to get out of supplemental protein. But in order to do that, you’ll need to understand the pros and cons of collagen vs. whey and how they compare to each other. The body can make its own collagen, but this naturally declines over time. Stressors like sun exposure, high-sugar diets2, and smoking tobacco can also further diminish collagen levels. In turn, you might consider adding collagen supplements to your wellness routine.