AG1 Foundational Nutrition vs Thorne Vitamin D + K2 Liquid
Specs, prices, editor verdict, and who should buy which - compared side-by-side.
AG1 AG1 Foundational Nutrition (premium, $79–$99/mo) vs Thorne Vitamin D + K2 Liquid (entry, $34) - different tools for different jobs (see the per-product details below).
Compared on 1 shared spec · same category (supplement).
These are close picks. Both score in the same range. The right call depends on buyer profile - read the per-buyer recommendations below.
Side-by-side specs
| Spec | AG1 AG1 Foundational Nutrition | Thorne Vitamin D + K2 Liquid |
|---|---|---|
| price | $79–$99/mo | $34 |
| servings | 30 per pouch | ~600/bottle (2 drops) |
AG1 AG1 Foundational Nutrition also publishes: ingredients, certifications, subscription
Thorne Vitamin D + K2 Liquid also publishes: dose, form, testing
Who should buy which
Buyers who want one daily foundational scoop instead of managing 4-6 separate supplements, and who value the NSF certification.
You're budget-sensitive, you already take a structured stack, or you're skeptical of multi-ingredient blends.
Anyone who wants an easy, liquid way to cover vitamin D and K2, especially in low-sun months, and who dislikes swallowing softgels.
You need an NSF Certified for Sport vitamin D (this SKU is not certified), or your bloodwork already shows a high vitamin D level.
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Frequently asked
Which is better, the AG1 Foundational Nutrition or the Thorne Vitamin D + K2 Liquid?
They are closely matched on our scoring, so the right pick comes down to your priorities. The verdict and spec table above compare them on price, features, and who each one suits.
How much do they cost?
AG1 Foundational Nutrition: $79 to $99. Thorne Vitamin D + K2 Liquid: $34. Prices are verified against the manufacturer; check the live links for current pricing.
Who should buy which one?
AG1 Foundational Nutrition: Buyers who want one daily foundational scoop instead of managing 4-6 separate supplements, and who value the NSF certification. Thorne Vitamin D + K2 Liquid: Anyone who wants an easy, liquid way to cover vitamin D and K2, especially in low-sun months, and who dislikes swallowing softgels.