Health Secretary Robert F. Kennedy Jr.'s new push to loosen federal restrictions on peptides could be a bonanza for telehealth companies, compounding pharmacies and longevity clinics looking for the next big wellness trend. Why it matters: The heavily touted but loosely regulated proteins could fuel the kind of boom we've seen with weight-loss drugs — even though there's little evidence they work in humans. State of play: The self-administered injections have become the rage among fitness enthusiasts, celebrities and consumers seeking to heal injuries, reduce inflammation and find anti-aging benefits. The interest has been juiced by social media influencers and podcasters like Joe Rogan, who hosted a segment in February during which Kennedy previewed his agenda and said he had taken peptides himself. The Food and Drug Administration will convene an advisory panel in July to decide if a series of peptides can be produced by compounding pharmacies.…