2 doctors weighed in:

Is the collagen enhance (resvital) vitamin good for our body, and what are the side effect?

2 doctors weighed in
Dr. Ed Friedlander
Pathology
1 doctor agrees

In brief: The grape stuff?

"resvital" is an old health fraud from grape skins.
There's a new, apparently-unrelated "french collagen enhancer" promotion with hyaluronic acid (which you can get much cheaper) and some magic to "rejuvenate your dna", which is obvious wishful-thinking. If you want to try it, be aware that you're spending money to enrich proponents of non-evidence-based medicine.

In brief: The grape stuff?

"resvital" is an old health fraud from grape skins.
There's a new, apparently-unrelated "french collagen enhancer" promotion with hyaluronic acid (which you can get much cheaper) and some magic to "rejuvenate your dna", which is obvious wishful-thinking. If you want to try it, be aware that you're spending money to enrich proponents of non-evidence-based medicine.
Dr. Ed Friedlander
Dr. Ed Friedlander
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