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Head-to-head buyer guide

InVite Health Vitamin D3 3000 IU (90-day supply) vs Thorne Vitamin D + K2 Liquid

Specs, prices, editor verdict, and who should buy which, compared side by side.

By Ryan · Founder
Updated Aug 27, 2026

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Quick verdict

InVite Health Vitamin D3 3000 IU (90-day supply) (entry, $23.99) vs Thorne Vitamin D + K2 Liquid (entry, $34). Different tools for different jobs (see the per-product details below).

Compared on 2 shared specs · same category (supplement).

InVite Health Vitamin D3 3000 IU 90-day supply bottle
InVite Health

Vitamin D3 3000 IU (90-day supply)

A pharmacist-formulated Vitamin D3 from a US-manufactured supplement retailer with 30+ years of clinical credibility - and the most foundational longevity supplement in any stack at under $25 for a 90-day supply.

PRICE
$23.99
View at InVite Health →
Thorne Vitamin D + K2 liquid drops
Thorne

Vitamin D + K2 Liquid

Vitamin D and K2 are often taken together for a simple reason, and Thorne packs both into a liquid that sidesteps the main annoyance of D supplements: swallowing yet another softgel.

PRICE
$34
The verdict

We have not scored these two head to head, so this page does not name a winner. The InVite Health Vitamin D3 3000 IU (90-day supply) starts at $23.99 and the Thorne Vitamin D + K2 Liquid at $34. The per-buyer recommendations below say who each one suits.

Side-by-side specs

SpecInVite Health Vitamin D3 3000 IU (90-day supply)Thorne Vitamin D + K2 Liquid
price$23.99$34
servings90 capsules per bottle (90-day supply at 1 capsule/day)~600/bottle (2 drops)
testingThird-party tested for purity + potencyThird-party tested for label accuracy + purity

InVite Health Vitamin D3 3000 IU (90-day supply) also publishes: active ingredient, dose options, manufacturing, shipping, brand age

Thorne Vitamin D + K2 Liquid also publishes: dose, form

Who should buy which

Pick the InVite Health Vitamin D3 3000 IU (90-day supply) if

Buyers wanting a clinically-credible foundational vitamin D3 at value-tier pricing, especially for buyers building their first daily supplement stack or replacing a prestige-brand D3 with an equivalent-quality cheaper alternative.

Skip if

You're an athlete subject to drug testing (Thorne NSF Certified for Sport is the right call), or you want maximum prestige-brand positioning (Pure Encapsulations, Designs for Health). Or you have lab-confirmed sufficient D status and don't need supplementation.

Pick the Thorne Vitamin D + K2 Liquid if

Anyone who wants an easy, liquid way to cover vitamin D and K2, especially in low-sun months, and who dislikes swallowing softgels.

Skip if

You need an NSF Certified for Sport vitamin D (this SKU is not certified), or your bloodwork already shows a high vitamin D level.

Go deeper

FULL REVIEW
Read the InVite Health Vitamin D3 3000 IU (90-day supply) review →
FULL REVIEW
Read the Thorne Vitamin D + K2 Liquid review →

Frequently asked

Which is better, the InVite Health Vitamin D3 3000 IU (90-day supply) or the Thorne Vitamin D + K2 Liquid?

We have not scored these two head to head, so this page does not name a winner. The InVite Health Vitamin D3 3000 IU (90-day supply) starts at $23.99 and the Thorne Vitamin D + K2 Liquid at $34. The per-buyer recommendations below say who each one suits.

How much do they cost?

InVite Health Vitamin D3 3000 IU (90-day supply): $23.99. Thorne Vitamin D + K2 Liquid: $34. Prices are verified against the manufacturer; check the live links for current pricing.

Who should buy which one?

InVite Health Vitamin D3 3000 IU (90-day supply): Buyers wanting a clinically-credible foundational vitamin D3 at value-tier pricing, especially for buyers building their first daily supplement stack or replacing a prestige-brand D3 with an equivalent-quality cheaper alternative. 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.

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