What foods increase collagen?

I'm curious to know, what specific foods have been found to promote an increase in collagen production? Are there any fruits, vegetables, or protein-rich sources that are particularly effective in this regard? Additionally, do certain dietary habits or cooking methods enhance the body's ability to absorb and utilize collagen from food sources? Lastly, are there any supplements or vitamins that can aid in boosting collagen levels, and are they SAFE for long-term use?