D-1,000, 90 Capsules
Thorne D-1,000 delivers 1,000 IU of vitamin D3 (cholecalciferol) per capsule, the bioidentical form the body produces in response to sunlight.
May be a fit for
- Adults seeking daily vitamin D3 maintenance at a moderate 1,000 IU dose
- Individuals with limited sun exposure needing foundational D3 support
- Practitioners protocols requiring a low-dose D3 for sensitive patients
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Thorne D-1,000 delivers 1,000 IU of vitamin D3 (cholecalciferol) per capsule, the bioidentical form the body produces in response to sunlight. It supports calcium absorption, bone density maintenance, immune function, and mood regulation, making it a practical option for those seeking a lower, daily-maintenance dose of vitamin D.
Why It's Worth Considering: Thorne's NSF Certified for Sport manufacturing and commitment to clean excipients make this a reliable choice for clinicians and health-conscious individuals alike who prefer a conservative, foundational D3 dose.
Thorne · 90 CapsulesMake it part of your routine.
Take 1 capsule one to three times daily or as recommended by your health professional.
Read the complete labelProduct details
Supplement facts & complete label
Serving Size:
One Capsule
Amount Per Serving:
Vitamin D (as Vitamin D3) (1,000 IU) ... 25 mcg
Other Ingredients:
Hypromellose Capsule, Leucine, Microcrystalline Cellulose, Silicon Dioxide, Vitamin E (d-Alpha-Tocopheryl)
ALLERGY WARNING
This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.
PREGNANCY
If pregnant, consult your health professional before using this product.
INTERACTIONS
There are no known adverse interactions or contraindications at publication date.
Label directions
Take 1 capsule one to three times daily or as recommended by your health professional.
Open original label ↗
Source: authorized supplier catalog · September 04, 2026. Formulas and labels can change. Check the packaging you receive.
Who it may suit
May be a fit for
- Adults seeking daily vitamin D3 maintenance at a moderate 1,000 IU dose
- Individuals with limited sun exposure needing foundational D3 support
- Practitioners protocols requiring a low-dose D3 for sensitive patients
- Those supporting bone and immune function with conservative D3 dosing
Considerations
- Known allergy to any ingredient (check label)
- Currently pregnant or breastfeeding (consult healthcare provider)
- Taking prescription medications (check for interactions)
- Under 18 years of age (unless recommended by pediatrician)
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More category questions
How should I store this supplement?
Store in a cool, dry place away from direct sunlight. Most supplements are stable at room temperature (59-77°F). Keep the bottle sealed between uses. Check the label for any specific storage requirements — some probiotics and oils require refrigeration.
Can I take this with other supplements?
Most supplements can be taken together safely. However, some minerals compete for absorption (zinc and iron, calcium and magnesium) and should be taken at different times of day. If you're taking prescription medications, consult your healthcare provider about potential interactions.
How long should I take this supplement?
Most supplements benefit from consistent daily use over 2-3 months to achieve full effect. Some (like vitamins and minerals) can be taken indefinitely as part of a daily routine. Others (like specific herbs) may benefit from cycling. Follow the product's recommended protocol or consult a practitioner.
When is the best time to take this?
Fat-soluble supplements (vitamins A, D, E, K, omega-3, CoQ10) should be taken with a meal containing fat. Water-soluble supplements (B vitamins, vitamin C) can be taken anytime. Minerals are generally best absorbed with food. Probiotics should be taken with or just before a meal. Check the product label for specific timing recommendations.
How do I know if this supplement is working?
Track your specific health goals — energy levels, sleep quality, joint comfort, digestion, mood, etc. Most supplements take 2-8 weeks for noticeable effects. For objective measurement, baseline lab tests before starting (and repeat at 3 months) provide definitive evidence. The Gabriel Score incorporates clinical evidence for expected outcomes.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.