Best in 7 days
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Description
gamma-L-Glutamyl-p-nitroanilide HCl, L-glutamine uptake inhibitor and gamma-glutamyl transpeptidase substrate (TBI4568)Description Product Details Alternate Names: GPNA Molecular Formula: C11H13N3O5 HCl Formula Weight: 303. 70 CAS Number: 67953 08 6 Purity: >98% Formulation: powder Solubility: Soluble in Water (up to 5 mg ml). Storage: 20C Stability: 1 year. Applications L glutamine uptake inhibitor and gamma glutamyl transpeptidase substrate Functions L Glutamyl p nitroanilide (GPNA) is a substrate for glutamyl transpeptidase. GPNA is used for the determination of
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 731 reviews
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Product Reviews
★★★★★ 4
Works well
Color: White&Black
Works well. Charge lasts reasonably long. The button placement could be thought out more. Difficult to pick it up with accidentally hitting button. S&P ends up everywhere.
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Reviewed in the United States on February 23, 2026
★★★★★ 5
You don't think it will change your life, but it will.
Color: Black
Had this grinder set for almost a year now and I, and my girlfriend can easily say we love these things. It genuinely makes cooking so much easier as salt and pepper are core foundations of seasoning. We've used these almost everyday, for all meals 2-3 times day and we have ZERO complaints. We love fresh cracked pepper but hate those small containers that you hand crack with, I'm looking at you McCormick. Need to season some steaks? Use these and in few seconds boom you're done without any straining whatsoever.
The setup is super straightforward and extremely simple. The containers do NOT come pre-filled with either salt nor pepper, however you can pick these up from say walmart for only a buck or two. Once you filled the containers, on the bottom of the grinders, you can easily select the grinding size that you want which is freaking awesome. Again for my steaks I like a bit bigger size of salt / pepper, however if I'm doing say an omelette I want something a bit finer. The charging base is awesome, however I will say these hold a charge for quite a while. We didn't charge these for over a month and they're still working hard. I believe the grind speed is perfect as it's not too slow nor too fast where I have to worry about over-seasoning my food.
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Reviewed in the United States on November 29, 2025
★★★★★ 1
They grind well, but have design flaws
Color: Black, Color: Black
These worked great for a few months, but then minor inconveniences became bigger issues.
While I initially liked these a lot...I would not purchase units with this design again
Pros:
These do grind well and have good adjustments to grind size.
The battery lasts plenty of time for a long cooking session
Flaws:
-because the grind comes out the bottom the base fills up with bits and grinding dust very quickly
-the location of the button inevitably leads you to pushing the button unintentionally when returning to the base
-the charging contacts are very small which means the smallest amount of material in the base makes the grinder sit crooked...and not charge
-in the past few weeks one of the seals on the bottom no longer will sit flush in the unit...which if course makes it sit crooked in the base and you guessed it...it won't charge. It seems to get a little worse as it is used more and I am waiting for it to basically become so bad it won't work at all anymore
The amount of material in the base in the photo is from probably 3-5 days of daily use.
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Reviewed in the United States on March 2, 2026
★★★★★ 5
Super Easy to use!
Color: Green
Love these! Love the color, easy to fill, so easy to use! And the light on the salt grinder is so smart!
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Good quality, easy to use
Color: 2-Speed Rechargeable Set with Base
I absolutely love these grinders. I always thought electric grinders were silly but I’m so glad I bought these. They work great. I like the adjustable grind and the light really helps. They look nice and are well made.
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Reviewed in the United States on January 19, 2026
