Your goal
Building stronger bones
For actually rebuilding bone, the real science comes down to a small class of daily injections that doctors already prescribe for osteoporosis. They work, but they are prescription drugs for people with thinning bones, not gym supplements. Almost everything else sold for bone strength is backed only by animal studies or hope.
What actually works
2The strongest real evidence for this goal.
Teriparatide
ProvenAn FDA-approved daily shot that genuinely rebuilds bone and cuts fracture risk in people with osteoporosis, proven in large human trials.
Abaloparatide
ProvenA newer approved daily shot in the same family that sharply lowers spine and hip fractures, with even bigger hip bone gains than teriparatide.
Promising, still unproven
1Interesting early signals — not proven yet.
Mostly hype, be skeptical
4Lots of buzz, little human proof. Tread carefully.
Oxytocin
EarlyThe bone-strength angle rests on animal studies and faint hints in people; the human evidence is all about childbirth, not bones.
Ipamorelin
EarlyOnly shown to protect bone in animals given steroids, with no human bone evidence at all.
ACE-031
EarlyAn experimental muscle-and-bone drug that was abandoned over side effects before its bone claims were ever proven.
Kisspeptin-10
EarlyA reproductive-hormone peptide studied for bone almost entirely in lab dishes and animals, with no real human bone data.
The honest bottom line
If you want stronger bones and have real bone loss, the only things proven to rebuild bone are prescription drugs like teriparatide and abaloparatide. Everything else marketed for bone is still guesswork.
How to read the strength meter