Vitamin D

The Sunny D3


Our Vitamin D is fermented with organic yeast and foods to make it easy for your body to digest.

Benefits of Vitamin D

Our Honest Assessment

Very Strong Research

Vitamin D is essential for general health and for strong bones.* Deficiency is rare, but has serious health consequences, like rickets.

A 2011 study showed that over 70% of Americans get less than the daily recommended amount of vitamin D. If you don't get a lot of sun - which helps your body produce vitamin D - or if your diet is low in foods that contain it, you may be among them. Foods that contain vitamin D are fatty fish, beef liver, and fortified milk and cereal.

Supports bone health

Adequate intake of vitamin D is essential to maintain healthy bones. Vitamin D is necessary for calcium and phosphorus absorption, which is why it is a major component of bone health.* Ingesting adequate calcium and vitamin D throughout life as part of a well-balanced diet may reduce the risk of osteoporosis.

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Research by the Numbers

Number of studies


Double-blind placebo


Years of studies


Produced from the sun

Vitamin D is found in our diet, but we also produce it through exposure to sunlight. However, a number of factors impact the ability for people to get necessary levels of vitamin D through sun exposure. Regional factors that prevent people from getting sun exposure include cloud cover patterns, smog, and the angle with which the sun hits the earth. In cities north of 37 degrees latitude (imagine a line drawn between San Francisco and Richmond, VA), it’s hard for people to produce enough vitamin D from sun exposure, especially between the months of November and March.

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Research by the Numbers

Number of studies


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Years of studies


Our Vitamin D

Fermented for absorption

Our Vitamin D is fermented with probiotics and organic foods, which gently cultures nutrients into an easily digested, highly active form that is easy for your body to absorb. In contrast, most vitamin D products are isolates, which are less bioavailable.

Manufactured in the U.S.

Our fermented Vitamin D is manufactured and encapsulated in the United States. We then issue a number of tests to ensure that the final product contains the correct levels of active ingredients and meets NSF standards on quality and safety.

Vitamin D

The Sunny D3

Gluten Free

Packaged in a shared facility with Wheat, Milk, Soy, and Salmon following current Good Manufacturing Practices (cGMP).

We recommend that you consult your doctor prior to use if you are considering taking dietary supplements for the first time, or are pregnant, nursing, taking any medications, or have any medical condition.

Store product in a cool and dry place. Keep out of reach of children. If you experience an adverse event or allergic reaction, discontinue use immediately and contact a healthcare professional.

What quality means to us:

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  1. We start at the source.

    We've traveled the globe to source our ingredients from the regions where they are cultivated best.

  2. We produce with care.

    We ferment our vitamins for easy digestion and avoid harsh solvents in the extraction process of our herbs.

  3. We test, vet and repeat.

    All raw materials and finished products are thoroughly tested in the United States.

  4. We show our work.

    We’re transparent on ingredient sourcing, manufacturing locations and testing.