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Thera-D 4000 Vitamin D Supplement - 4,000 IU (100 mcg) Vitamin D3 - 90-Day Supply - Immune Support Supplement - NSF Certified
Prices as of September 26, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.
Price history tracked at Macy's price tracker
14-day low
$29.72$29.72
Sep 13 · Macy'sSep 13 on Macy's
Best price
$29.72$29.72
−0% vs high0% below 14-day high
14-day high
$29.72$29.72
All storesAcross all tracked stores
$30$30$30
Sep 13Sep 26
- Macy's
About this product
Theralogix Thera-D 4000 is a dietary supplement providing 4,000 IU (100 mcg) of vitamin D3 per tablet. It contains the same biologically active form of vitamin D produced in the body after sun exposure, supporting bone and heart health. The supplement aids in maintaining normal vitamin D levels and supports immune function. Manufactured in the USA, it is independently tested for purity and potency by NSF, and is gluten-free, free of dyes, vegetarian, and made with premium ingredients.
- 4,000 IU vitamin D3 per tablet
- NSF certified for purity
- gluten-free and no dyes
- made in USA
- supports bone and immune health
- 90-day supply
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