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Head-to-head buyer guide

InVite Health Vitamin D3 3000 IU (90-day supply) vs Zhou Nutrition D3 + K2, 60 veggie capsules

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

By Ryan · Founder
Updated Oct 20, 2026

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Quick verdict

InVite Health Vitamin D3 3000 IU (90-day supply) (entry, $23.99) vs Zhou Nutrition D3 + K2, 60 veggie capsules (entry, $19.29). Different tools for different jobs (see the per-product details below).

Compared on 0 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 →
Black Zhou Nutrition D3 + K2 bottle, 60 veggie capsules, front label in white, gold and orange with a sun graphic, decorative shapes behind it on a white background
Zhou Nutrition

D3 + K2, 60 veggie capsules

Zhou Nutrition D3 + K2 puts 125 mcg of vitamin D3 and an MK-7 form of K2 in one vegetarian capsule a day. A bottle of 60 is $19.29 on Zhou's own store, and the brand's pages give the K2 as 100 mcg in one place and 90 mcg in another.

PRICE
$19.29
View at Zhou Nutrition →
The verdict

We have not scored these two head to head, so this page does not name a winner. The Zhou Nutrition D3 + K2, 60 veggie capsules starts at $19.29 and the InVite Health Vitamin D3 3000 IU (90-day supply) at $23.99. The per-buyer recommendations below say who each one suits.

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 Zhou Nutrition D3 + K2, 60 veggie capsules if

Buyers who want vitamin D3 and an MK-7 K2 in a single vegetarian capsule taken once a day, at $19.29 for 60 capsules direct from the brand, and who are comfortable with a K2 amount the brand gives two ways.

Skip if

You keep a vegan diet, since Zhou says the D3 comes from lanolin; you want a published certificate of analysis or a third-party certification mark on the product; you need one settled K2 figure before you buy; or you want free shipping on a single bottle, since the $30 threshold sits above its $19.29 price.

Go deeper

FULL REVIEW
Read the InVite Health Vitamin D3 3000 IU (90-day supply) review →
FULL REVIEW
Read the Zhou Nutrition D3 + K2, 60 veggie capsules review →

Frequently asked

Which is better, the InVite Health Vitamin D3 3000 IU (90-day supply) or the Zhou Nutrition D3 + K2, 60 veggie capsules?

We have not scored these two head to head, so this page does not name a winner. The Zhou Nutrition D3 + K2, 60 veggie capsules starts at $19.29 and the InVite Health Vitamin D3 3000 IU (90-day supply) at $23.99. 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. Zhou Nutrition D3 + K2, 60 veggie capsules: $19.29. 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. Zhou Nutrition D3 + K2, 60 veggie capsules: Buyers who want vitamin D3 and an MK-7 K2 in a single vegetarian capsule taken once a day, at $19.29 for 60 capsules direct from the brand, and who are comfortable with a K2 amount the brand gives two ways.

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