3-hydroxy-propanoic acid has good probabilities to bee dehydrated to acrylic acid in the acid environment of the stomach. Acrylic acid is not a nice thing to have in your body, so I would strongly advise you against ingesting that stuff.
The least you could do before even thinking of ingesting something like that is to find the MSDS sheets of both 3-hydroxy-propanoic and acrylic acid and see what the LD50 and the acute toxicity symptoms are like.