While most foods contain antioxidants and other nutrients to help the body synthesize collagen, bone broth is one of the rare foods to actually contain a bioavailable form of collagen your body can use right away.
Since collagen types I, II, and III are concentrated in the tendons, ligaments, bones and joints, cooking down these animal parts for long periods of time helps release collagen from the bones (as well as other amino acids, proteins and electrolytes that can improve the skin’s appearance), resulting in a nutrient-rich broth, arguably superior to collagen supplements.
Beef bone broth is richest in type I collagen, which makes it the best choice for skin health, while chicken and turkey broth are higher in type II collagen for supporting the joints.
Yes citrus, leafy greens, tomatoes, avocado, eggs, salmon etc..are all great in boosting collagen as well. I'm 35, no grey hairs yet dude, but I think that might be genetic, I have one uncle who went full grey by 28, and the other his older brother has few grey hairs and he's 5 years older, they are both now in their 40's. One thing I suggest is getting the "Fuck boy" lol hair cut! This shit has done wonders for me for picking up young hoe's!