Product Description
Pre-sunrise runs, sunscreen on every outdoor ride, and winter weeks on the trainer all cut down the sunlight your skin has to work with. Your skin makes vitamin D from that sunlight, it's the biggest daily driver. So a daily supplement can be the dependable way to keep your intake up through those stretches.
SwissRX Vitamin D 1,000 IU supports your bones, immune function, and muscles with 25 mcg of vitamin D3 in every capsule.
Bone support for high-volume weeks – Vitamin D helps your body absorb the calcium and phosphorus your skeleton is built from, so your bones get the raw material they need while training keeps loading them.
A steady immune routine in heavy blocks – Vitamin D supports normal immune function, which makes a daily intake an easy habit to keep when volume climbs and daylight shrinks.
Muscle strength and comfort – Vitamin D also supports muscle strength and comfort, one more reason to keep your intake steady when you stack hard days back to back.
Vitamin D3, also called cholecalciferol, is the form your skin produces from sunlight, and it raises and maintains vitamin D levels more effectively than the D2 form. Vitamin D dissolves in fat, so it absorbs best with a meal that contains some. Vitamin D helps your body absorb calcium and phosphorus and supports immune function and muscle strength.
How to Use SwissRX Vitamin D 1,000 IU
Dose: Take 1 capsule per day with a meal that contains some fat.
Fall and winter: Keep the habit going through the months when more of your training moves indoors and daylight drops.
Supplement Facts
180 Servings
Serving Size: 1 Capsule
Serving Per Container: 180
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| Vitamin D (D3 as Cholecalciferol) 25mcg (1,000 IU) | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
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SwissRX Vitamin D 1000 IU FAQ's
Everything you need to know before getting started.



Take it with a meal that contains some fat. Breakfast or dinner both work, so pick the meal you reliably eat every day.
Early or late sessions, indoor training, and sunscreen all reduce the sun your skin gets, and your skin makes vitamin D from sunlight. A daily capsule keeps your intake from depending on the weather and the calendar.
SwissRX Vitamin D3/K2 capsules provide 5,000 IU of D3 plus vitamin K2 in each capsule. SwissRX Vitamin D 1,000 IU is a lower dose of D3 on its own.