Vitamin A
as retinyl palmitate
- Daily need
- Upper limit
Vitamins A · D3 · K260 chewable tablets
Foundational ADK
A high-potency daily formulation combining vitamins A, D3, and K2, three essential nutrients that work better together.
Three essential nutrients at high potency
Clinically relevant formulas
Vitamin A (as retinyl palmitate) · Vitamin D3 (as Vegadelight® cholecalciferol from lichen) · Vitamin K2 (as MenaQ7® menaquinone-7 from chickpea)
- Supports immune function, healthy vision, and strong bones*
- Helps direct calcium to bones and supports cardiovascular health*
- Bioavailable forms in a chewable format designed to address the absorption issues of traditional delivery formats*
- CCOF Organic, Vegan, Non-GMO Project Verified, gluten free, no artificial ingredients
- Take two chewable tablets daily.
In every two-tablet serving
- 1400 mcg
- Vitamin A (retinyl palmitate)
- 200 mcg
- Vitamin D3 (Vegadelight®)
- 250 mcg
- Vitamin K2 (MenaQ7®)
No proprietary blend. Every amount printed on the label.
Description
Vitamins A, D3, and K2 each play an essential role, and they work best as a team. Vitamin A supports vision, immune function, and healthy cell function. Vitamin D3 helps the body absorb calcium. Vitamin K2 helps direct calcium to the bones where it belongs and supports cardiovascular health.*
KOS Foundational ADK is a high-potency daily chewable that brings together vitamin A as retinyl palmitate, plant-based vitamin D3 from lichen (Vegadelight®), and vitamin K2 as MenaQ7® from chickpea. Formulated in bioavailable forms and delivered as a chewable tablet to address the absorption issues associated with traditional formats, it supports cellular function and everyday wellness for adults of every age.*
- Three key nutrients at high potency, working synergistically
- Bioavailable forms designed for a superior absorption profile compared to standard ADK formulations*
- Third-party tested and made in a GMP-certified facility
What to expect
Vitamins A, D3, and K2 work quietly behind the scenes, so changes are often subtle. Consistency is what counts.
Days 1-7: Your body begins absorbing and putting these nutrients to work. Most people won’t notice an immediate difference.
Weeks 2-4: Daily use keeps your intake of these essential nutrients consistent, supporting immune function, bone health, and vision.*
Week 4+: Continued daily use helps support long-term bone, immune, vision, and cardiovascular wellness.*
Vitamins A, D, and K are fat-soluble, so take your chewable with a meal that includes some healthy fat. Take two chewable tablets daily, as directed on the label.
Why you’ll love it
- Three essential nutrients at high potency in a chewable tablet format
- Plant-based vitamin D3 from lichen (Vegadelight®) and vitamin K2 as MenaQ7® from chickpea
- Formula designed to address the absorption issues of traditional formats
- Broad appeal for adults of every age, including healthy aging
- CCOF Organic, vegan, Non-GMO Project Verified, with no artificial ingredients
How to use
Take two chewable tablets daily. Chew thoroughly before swallowing.
Take it consistently, and always follow the directions on the label.
Is it safe?
Foundational ADK is generally well tolerated by healthy adults when used as directed. Don’t exceed the recommended amount. Keep out of reach of children. Store in a cool, dry place, and don’t use it if the safety seal is broken or missing.
High-Potency Formula: This product provides concentrated amounts of the fat-soluble vitamins A, D3 and K2. Because individual needs vary and these nutrients can also come from diet and other supplements, consult your healthcare professional before use, particularly if pregnant, nursing, taking medication, or using additional products containing vitamins A, D or K.
Guarantee & shipping
Try Foundational ADK for 15 days. If you don’t feel a difference, email hello@kos.com for a full refund.
Orders usually arrive in 3 - 5 days. Free shipping over $75.
High-Potency Formula: This product provides concentrated amounts of the fat-soluble vitamins A, D3 and K2. Because individual needs vary and these nutrients can also come from diet and other supplements, consult your healthcare professional before use, particularly if pregnant, nursing, taking medication, or using additional products containing vitamins A, D or K.
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
Nourish today for a brighter tomorrow.
Three essential nutrients working together.
Immune Support
Helps support a healthy immune system.*
Bone Health
Working together to support strong, healthy bones.*
Vision Support
Helps maintain healthy vision and eye health.*
Cardiovascular Support
Helps support healthy calcium balance and cardiovascular wellness.*
Myths vs Facts
What to know about vitamins A, D3, and K2
-
Myth
Vitamin D alone is enough.
TruthVitamin D3 helps the body absorb calcium, but it works best when paired. Vitamin K2 helps direct calcium to the bones, and vitamin A supports immune function and healthy cell function.*
-
Myth
ADK is only for older adults.
TruthADK is for anyone. Immune, bone, vision, and cardiovascular wellness matter at every age, and ADK is beneficial for healthy aging too.*
-
Myth
All ADK supplements are the same.
TruthNot all are. Foundational ADK combines three key nutrients at high potency in bioavailable forms, designed to work synergistically.*
-
Myth
A swallowed pill is the best way to take vitamins.
TruthTraditional formats can present absorption issues. Foundational ADK is a chewable tablet designed to address them.*
-
Myth
I get all I need from sunshine and food.
TruthDiet and sunshine both contribute, but needs vary by lifestyle, season, and diet. ADK helps fill nutritional gaps.*
-
Myth
Vitamin K is only about blood clotting.
TruthVitamin K2 also plays a role in helping direct calcium to the bones and supporting cardiovascular wellness.*
Every ingredient. Every dose. On the label.
No proprietary blend. Premium, bioavailable forms for optimal support.
1400 mcg (156% DV)
Vitamin A (as retinyl palmitate)
Supports vision, immune health, and healthy cell function.*
200 mcg (1000% DV)
Vitamin D3 (as Vegadelight® cholecalciferol from lichen)
Supports calcium absorption, bone health, immune function, and mood.*
250 mcg (208% DV)
Vitamin K2 (as MenaQ7® menaquinone-7 from chickpea)
Helps support proper calcium utilization, bone health, and cardiovascular wellness.*
Essential nutrients. Everyday support. A healthier, brighter you.
How it works
How the A-D3-K2 trio supports your body
- 01
Vitamin A
Supports immune function, and healthy vision.*
- 02
Vitamin D3
Enhances calcium absorption in the gut.*
- 03
Vitamin K2
Helps direct calcium to bones and away from arteries.*
- 04
Cellular support, every day
The result: support for cellular function, immune health, bone health, vision, and cardiovascular wellness.*
Whole body wellness, naturally.
How much you get, in IU
Labels list these vitamins in mcg, but most people know them in IU. Pick one or two tablets and see how each one compares with what adults need every day.
How many tablets
Compare with the daily need for
Vitamin D3
as Vegadelight® from lichen
- Daily need
- Upper limit
Vitamin K2
as MenaQ7® (MK-7) from chickpea
- Daily need
- Upper limit
Convert any label
Vitamin K has no IU, it's always listed in mcg. Beta-carotene converts differently from retinol.
Daily needs are the Recommended Dietary Allowances for adults (Adequate Intake for vitamin K) and upper limits are the Tolerable Upper Intake Levels, both from the NIH Office of Dietary Supplements. Upper limits count vitamin A and D from all sources: food, drinks and supplements. Conversions: vitamin D 1 mcg = 40 IU; vitamin A as retinol or retinyl palmitate 1 mcg RAE = 3.33 IU. If you're pregnant, nursing, or take medication (especially blood thinners) or other supplements with these vitamins, talk to your healthcare provider first.
Foundational ADK vs a typical ADK supplement
KOS Foundational ADK
Typical ADK Supplement
Supports immune function, bone health, and vision*
✓
✓
Three key nutrients at high potency, working synergistically
✓
—
Premium forms: Vegadelight® D3 from lichen and MenaQ7® K2
✓
—
Chewable tablet designed to address absorption issues*
✓
—
Easy daily routine: two chewable tablets a day
✓
—
CCOF Organic with no artificial ingredients
✓
—
Nourish the Vision Behind Every Screen
Modern life asks a great deal of your eyes: hours of sustained focus, and screens from morning until night. Vitamin A, offered here as retinyl palmitate, helps maintain healthy vision and eye health.*
Foundational ADK pairs vitamin A with plant-sourced D3 and K2, formulated to work synergistically at high potency in a chewable designed to address absorption issues.
Right nutrients. Brighter tomorrow.
Who is it for
Daily support for every age, stage, and routine.
Daily wellness
Anyone building a healthy routine
Support immune function, bone health, and vision every day, at any age.*
Healthy aging
As your needs evolve
Support bone, immune, and cardiovascular health as you age.*
Targeted support
Bone, vision & cardiovascular wellness
Vitamins A, D3, and K2 support strong bones, healthy vision, and healthy calcium balance.*
Higher nutrient needs
Anyone who needs additional support
Take two chewable tablets daily, or as recommended by your healthcare provider.
Frequently asked questions
Still unsure? Email hello@kos.com and a human will answer.
How do I take it?
Take two chewable tablets daily and chew thoroughly before swallowing. Always follow the label directions.
What is ADK?
ADK stands for vitamins A, D3, and K2, three essential nutrients that work together to support immune function, bone health, vision, and cardiovascular wellness.*
When will I feel something?
Individual experiences vary. Vitamins work behind the scenes, so many people don’t notice an immediate change. Consistent daily use supports long-term wellness and cellular function.*
Why combine A, D3, and K2?
Each nutrient plays a different role. D3 helps the body absorb calcium, K2 helps direct it to the bones, and A supports vision, immune function, and healthy cells. Together at high potency, they work synergistically.*
Why a chewable tablet?
Traditional delivery formats can present absorption issues. This chewable tablet is designed to address them, with bioavailable forms of each nutrient.*
Is it safe to take with medications?
Consult your healthcare provider before use if you are taking medications, especially blood thinners, or if you have a medical condition.
Is it safe during pregnancy or nursing?
High-Potency Formula: This product provides concentrated amounts of the fat-soluble vitamins A, D3 and K2. Because individual needs vary and these nutrients can also come from diet and other supplements, consult your healthcare professional before use, particularly if pregnant, nursing, taking medication, or using additional products containing vitamins A, D or K.
Is it vegan and organic?
Yes. It’s vegan, CCOF Organic, Non-GMO Project Verified, gluten free, and made with no artificial ingredients.
Can I take it with other KOS products?
Yes. It stacks well with our protein powders and other daily formulas.
Who is this for?
Foundational ADK has broad appeal and isn’t limited to one demographic. It’s for adults of all ages who want to support immune function, bone health, vision, and cardiovascular wellness, and it’s beneficial for healthy aging too.*
Nourish today for a brighter tomorrow.
Feel your best.
The KOS Promise- Plant Powered CCOF Organic, vegan, Non-GMO Project Verified.
- Clean Ingredients No artificial ingredients.
- Third Party Tested Checked by an independent lab, not by us.
- Quality You Can Trust Made in a GMP-certified facility.
- Made With Care Full doses printed on the label. Nothing hidden.
Add to cart$43.00
60 chewable tablets per bottle
- 15 day money back guarantee
- Free shipping over $75
- Usually arrives in 3 - 5 days
High-Potency Formula: This product provides concentrated amounts of the fat-soluble vitamins A, D3 and K2. Because individual needs vary and these nutrients can also come from diet and other supplements, consult your healthcare professional before use, particularly if pregnant, nursing, taking medication, or using additional products containing vitamins A, D or K.
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
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