how many times a day should I use it?

Once a day - 15 minutes. Actually, when I used it for the first time, I felt pain, that's why I used them once-twice a week, but not for 15 min, for 30 min may be. And I really saw a result.

do these work on veneers?

No. It says it does not work on veneers, crowns, fillings, or dentures on the box

Do I use the package of glamour strips for 14 days until they are all used?

I personally would start with 10 days.

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3D White Glamorous White Whitestrips - 28 Strips (Packaging May Vary)

Product ID: 3599561

Details

Active Ingredients
PVP Water
Brand
Crest
Item Form
Strip
Number of Items
1
Product Benefits
Enamel

✨Enamel-safe whitening

🚫No-slip grip

🛡️Advanced Seal tech

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MOP$586

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Smile Bright, Live Bold — Because Your Glow Should Never Fade

UNMATCHED COMFORT FIT - No-slip design ensures strips stay put without discomfort or mess.
GENTLE YET EFFECTIVE FORMULA - Hydrogen peroxide-based whitening that protects enamel while brightening your teeth.
DENTIST GRADE WHITENING POWER - Uses the same enamel-safe agent trusted by professionals for a radiant smile.
28 STRIPS FOR A FULL TREATMENT CYCLE - Complete your whitening journey with a month-long supply designed for consistent results.
ALL DAY CONFIDENCE NO INTERRUPTIONS - Advanced Seal technology keeps strips firmly in place so you can multitask effortlessly.

Crest 3D White Glamorous White Whitestrips deliver professional-level teeth whitening with enamel-safe hydrogen peroxide and advanced seal technology for a no-slip, comfortable fit. Each pack contains 28 strips, providing a full treatment cycle that fits seamlessly into your busy lifestyle.

Specifications

ASIN	B004UJSD56
ASIN	B004UJSD56
Active Ingredients	PVP, Water, PEG-8, Acrylates Copolymer, Hydrogen Peroxide, Sodium Hydroxide, Sodium Saccharin.
Age Range Description	Adult
Allergen Information	Abalone Free
Best Sellers Rank	#173,458 in Health & Household ( See Top 100 in Health & Household ) #167 in Teeth Whitening Strips
Brand Name	Crest
Customer Reviews	4.4 4.4 out of 5 stars (772)
Date First Available	June 26, 2011
Flavor	Unflavored
Included Components	Whitening Strip
Is Discontinued By Manufacturer	No
Item Dimensions	5.75 x 1.65 x 5.65 inches
Item Form	Strip
Item model number	3d
Manufacturer	PROCTER & GAMBLE-HEALTH
Manufacturer	PROCTER & GAMBLE-HEALTH
Manufacturer Part Number	4325162543
Material Type Free	Abalone Free
Model Number	3d
Number of Items	1
Product Benefits	Enamel Protection, Whitening
Product Dimensions	5.75 x 1.65 x 5.65 inches; 1.45 ounces
UPC	037000201793
Unit Count	28 Count

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