This is a presentation I came across about navarra asparagus extract.
There were in vitro and in vivo tests (placebo controlled with people). The most interesting finding was:
in vivo:
- Significantly increases collagen density by 7.5% after 56 days; 4-fold improvement compared to placebo
- Significantly increases dermis thickness by 18% after 56 days
https://cdn.shopify....253872713254821
Thoughts?