I've seen stunts like this pulled before with other companies. I highly doubt Manny Pacquiao would put his legacy on the line endorsing a 4 month old company pitching a product that has no scientific data to back up their claims.
However, the press release alleges a direct quote from him. It will only take a few days before we find out whether he is really endorsing the product, or this is some type of back door scheme using the foundation to promote a relationship between Pacquiao and the company.