Osteocalcin

Specialist

also —

What it isOsteocalcin is a small protein made by osteoblasts (bone-building cells) and released into circulation during bone formation. It also functions as a hormone influencing glucose metabolism and male reproductive.

DoesMarks new bone formation; binds calcium and helps incorporate it into bone matrix; signals to pancreas and other tissues.

GoodMid-range osteocalcin signals active bone formation and healthy skeletal remodeling.

BadLow osteocalcin suggests reduced bone formation and may track diabetes and metabolic dysfunction. High osteocalcin reflects accelerated turnover.

Standard

Men 9–42 ng/mL; women 6–37 ng/mL.

Optimal

18–30 ng/mL men, 15–28 ng/mL women (narrow target)

Modifiers

Tracks bone turnover; affected by vitamin K2 status (which carboxylates osteocalcin).

How to optimize

Lifestyle: Weight-bearing and resistance training drive bone formation.
Diet: Adequate vitamin K2; fermented foods (natto), aged cheeses.
Supplements: Vitamin K2 MK-7 (180–360µg/day) for carboxylation; vitamin D3; calcium from food.
Peptides: —
Drugs: Anabolic osteoporosis drugs (teriparatide, abaloparatide) raise osteocalcin; bisphosphonates lower it.

within Bone Density