SFH K2+D3 Calcium Complex

Base training through the winter usually means more treadmill miles and fewer long days outside. That trade adds up over a season, with less sun on your skin, less vitamin D being made, and a body that still needs calcium routed into bone instead of left to drift.

SFH's K2+D3 Calcium Complex pairs the mineral your bones are built from with the two nutrients that get it there. This complex pairs 210 milligrams of calcium with 125 mcg vitamin D3 and 100 mcg vitamin K2.

Covers the Bone-Building Chain – Calcium supplies the raw material, vitamin D3 gets it absorbed, and vitamin K2 makes sure it ends up in bone instead of circulating unused.

Matters Most When Daylight Is Short – The D3 dose here is high enough to matter during months spent training indoors or through short winter daylight, when your skin isn't making much of its own.

Absorption Isn't Left to Chance – BioPerine is formulated into the same capsule, so getting the benefit doesn't depend on remembering to take it alongside a fatty meal.

Vitamin D3 increases how much calcium your digestive tract absorbs from the food and supplements you take in, but absorption on its own doesn't determine where that calcium goes. Vitamin K2, in the MK-7 form used here, activates a protein that binds circulating calcium and directs it into bone rather than into soft tissue like arterial walls. Each capsule delivers 210 milligrams of calcium alongside 5,000 IU of D3 and 100 micrograms of K2, plus 5 milligrams of BioPerine, a black pepper extract that has been clinically studied for its effect on nutrient absorption.

How to Use SFH K2+D3 Calcium Complex

Dose: Take 1 capsule daily, with food.

Pair It With Your Biggest Meal: Since D3 and K2 are both fat-soluble, taking this capsule alongside the meal with the most fat in it, rather than on an empty stomach or with black coffee alone, will get you better uptake.