PlainVitamins

Think Sharp

by Xtendlife · capsule · 60 vege capsules

  • On the market (NIH)
  • UPC 9 421904 523517
  • DSLD label 331307
  • Serving 2 capsules
  • 30 servings

Think Sharp by Xtendlife lists 10 ingredients, 10 with an amount per serving of 2 capsules, such as 1.7 mg of vitamin B6, 500 mcg DFE of folate, 2.4 mcg of vitamin B12 and 167 mg of sibelius sage. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2025.

What is in Think Sharp?

Each row as the label prints it, per serving of 2 capsules. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Think Sharp: Supplement Facts rows against the market (DSLD label 331307, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin B6as Pyridoxal 5-Phosphate1.7 mg100%Vitamin B6 in Think Sharp against 15,277 products1.7 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg1.7 mg

83% of 15,277 products listing vitamin B6 give more (median 6 mg).

Folateas Calcium L-5-Methyltetrahydrofolate500 mcg DFE75%
Folic Acid300 mcg
Vitamin B12as Cobamamide2.4 mcg100%Vitamin B12 in Think Sharp against 14,425 products2.4 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg2.4 mcg

91% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Sibelius Sageas Sage Extract167 mgSage in Think Sharp against 138 products167 mg per serving; the middle half of products list 75 mg to 400 mg, the median 200 mg.167 mg

59% of 138 products listing sage give more (median 200 mg).

CyanthOx 30as Sea Buckthorn Fruit Extract150 mgSea Buckthorn in Think Sharp against 70 products150 mg per serving; the middle half of products list 100 mg to 500 mg, the median 225 mg.150 mg

56% of 70 products listing sea buckthorn give more (median 225 mg).

Bacopa leaf extract120 mgBacopa in Think Sharp against 481 products120 mg per serving; the middle half of products list 100 mg to 300 mg, the median 200 mg.120 mg

61% of 481 products listing bacopa give more (median 200 mg).

Phosphatidyl L-Serineas Sunflower75 mgPhosphatidylserine in Think Sharp against 641 products75 mg per serving; the middle half of products list 50 mg to 150 mg, the median 100 mg.75 mg

65% of 641 products listing phosphatidylserine give more (median 100 mg).

Oxi-fendas Red Grape skin extract50 mgGrape in Think Sharp against 1,900 products50 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.50 mg

48% of 1,900 products listing grape give more (median 50 mg).

Huperzine Aas Toothed Clubmoss, Toothed Clubmoss150 mcgHuperzine in Think Sharp against 589 products150 mcg per serving; the middle half of products list 50 mcg to 200 mcg, the median 100 mcg.150 mcg

Higher than 61% of 589 products listing huperzine (median 100 mcg).

Source: NIH ODS Dietary Supplement Label Database, label 331307 (entered June 25, 2025), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • 91% of the 14,425 products that print an amount of vitamin B12 list more than its 2.4 mcg of vitamin B12 (median 36 mcg).

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Think Sharp's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions For Use Adults: 2 capsules per day with or without food.
Warnings
Consult your health care provider if you are pregnant, breastfeeding or taking medication.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 331307.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Maltodextrin, Hydroxypropyl Methylcellulose, Water.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Best quality guarantee; NewZealand.com Licence No.100055.

How many labels does Think Sharp have?

2 labels are on file under this name since March 22, 2023: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 331307 (current) Entered June 25, 2025 · on the market · 60 vege capsules · UPC 9 421904 523517
  2. Label 283399 Entered March 22, 2023 · off the market November 18, 2024 · 60 vege capsules · UPC 9 421904 523517

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Natural Products (NZ) LTD Member of the Xtend-Life Group (manufacturer), Christchurch, New Zealand. All Xtendlife products.

Where next?