Thorne Vitamin D-5,000 review

Thorne Vitamin D-5,000 ranks first because it has the strongest outside check on this list at a fair price. Each capsule holds 125mcg (5,000 IU) of vitamin D3 as cholecalciferol, and the bottle carries NSF Certified for Sport, which Thorne says tests label claims and screens for nearly 300 substances banned by major athletic organizations. Thorne also says it tests each ingredient for identity, purity and potency, including heavy metals, pesticides and microbes. The formula has no lactose and no preservatives, and the page lists it as gluten, dairy and soy free. The 60 capsule bottle costs $20, about $0.33 a day. That is more than the drugstore picks below, and 5,000 IU is a high daily dose for people who have not had a blood test. Thorne's own FAQ suggests testing your vitamin D level first, and it sells a D-1,000 version for lower needs. For drug-tested athletes, the NSF mark is the deciding detail.

Who it is for

athletes and anyone who wants a certified capsule

Price

$20 for 60 capsules (60 servings), about $0.33 per day.

$20 /60 Capsule(s)
Quoted from the vendor pricing page on November 13, 2026.

Key features

• 125mcg (5,000 IU) of vitamin D3 as cholecalciferol per capsule
• NSF Certified for Sport, which Thorne says screens for nearly 300 banned substances
• No lactose and no preservatives
• Also sold as D-1,000 and D-10,000 and in a 120 serving bottle
• Gluten free, dairy free and soy free per the product page

Strengths and weaknesses

• Strength: The only capsule on this list with NSF Certified for Sport
• Strength: Thorne says it tests each ingredient for identity, purity and potency, including heavy metals and pesticides
• Strength: Thorne accepts FSA and HSA funds through Truemed
• Weakness: $20 for 60 capsules costs about three times the per-dose price of Nature Made or NOW
• Weakness: 5,000 IU is above the 2,000 IU many adults take for maintenance
• Weakness: Capsule shell is hypromellose, so it is not a softgel with oil

Key facts

• Dose: 5,000 IU (125mcg) per capsule
• Servings: 60
• Certification: NSF Certified for Sport
• Form: Capsule
• Price per serving: About $0.33

Where it ranks

Thorne Vitamin D-5,000 is No. 2 in our Best Vitamin D Supplements verdict.