Vitamin D3 + K2 Drops.

For the months when the sky offers little of its own: one golden drop under the tongue, at the same hour each day, with a meal. Vitamin D has been tied to sunlight since long before its chemistry was understood, which makes this a small ritual for gray seasons.

The oil carries two fat-soluble nutrients in one drop. The vitamin D3 is drawn from sheep's wool lanolin rather than synthesized, and the K2 is in its MK-7 form, the longer-chain variant that lingers longest in the blood. K2 has its own lineage: it was isolated from natto, the pungent fermented soybean dish, where it occurs in far greater concentration than in almost any other food. Pairing the two follows an old logic of nutrients that keep each other company.

Details

• Vitamin D3, from sheep's wool lanolin
• Vitamin K2 as MK-7
• Liquid drops in a golden oil

How to use

Place one drop under the tongue and hold it a moment before swallowing, ideally with a meal that carries some fat, since a fat-soluble vitamin needs something to travel on. Take it in the same window each day. A blood test is the best guide to how much you need, and if you take warfarin, talk to your doctor first. This is not a medicine and no substitute for medical advice.

A drop of borrowed sunlight for the gray half of the year.