Amazon offers the Natrol Vitamin D3 2,000 IU Fast Dissolve Mini Tablets 90-Count Bottle in Strawberry for $5.99. Add it to your cart with Subscribe & Save to cut it to $5.69 and bag free shipping. Outside of the price below, that's the lowest total price we could find by $6. They purport to help support bone health.

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A close price: Puritan's Pride charges a buck more.