The most helpful information!!
The most helpful information at one's fingertips for understanding and calculating injection dosage! Thank you!!
Barb Meinema
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Fat Scientist
5.050 reviews
Last reviewed: Feb 28, 2026Do you agree with Fat Scientist's TrustScore? Voice your opinion today and hear what 96 customers have already said.
fatscientist.comMember since Mar 2026
Fat Scientist is an online company. Based on 50 reviews on TrustPlane, it has an average rating of 5.0 out of 5 stars. Last reviewed February 28, 2026.
Customer Reviews
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50 reviews
Critical tool!
This tool was critical to understand dosing. I use this every single time I have a new vial. It is not only educational, it is VITAL for patient safety. This can be confusing and fat scientist has helped me so much in understanding dosing and safety.
Justine F
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Prevents me from making dosing mistakes
This is one of the best tools I’ve used in my glp-1 journey! I always check the calculators before I take a shot, so I don’t make a mistake. I have peace of mind every shot day - thank you Fat Scientist!
Sarah W.
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Fat Scientist saved my weight loss journey!
When I started Tirzepatide I went through a very expensive doc in the box who wrote scripts…that’s it. He didn’t explain things and would take days to reply to a question…I was on my own and knew nothing! Somehow I stumbled across Fat Scientist…had I not, I would have given up before I started. Fat Scientist quickly became my professor, doctor, nurse, pharmacist and supportive friend all rolled into one. Thank you, Fat Scientist, you have been more than life changing!
TexasSMU
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Dosing Safely!
Even if I "know" my dose because it hasn't changed, I still plug the numbers into fatscientist as a back-up EVERY TIME. It's simple and intuitive - thank you fatscientist.com!
Rebecca Oldfield-Frey
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Very easy to use and straightforward.
Very easy to use and straightforward.
Sandra Ramirez
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I look at Fat Scientist each week for…
I look at Fat Scientist each week for my dosing even when I already know it. I just like to make sure :-) and I trust them and have been enjoying their service for 8 months now!
Sarah Reyes
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Great advice on GLP and dieting in…
Great advice on GLP and dieting in general. Best GLP calculator on the net for choosing dose and beginner friendly and top tier
booker
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Super easy to use
Super easy to use, and what a relief to have a simple platform to ensure I’m taking the correct amount. Showed it to my sister, and she loves it!
Andrea Miller
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This was exactly what I needed for…
This was exactly what I needed for calculating my injection amounts. They're sites layout is perfect.
john horton
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I use this EVERY week!
I use this EVERY week before I do my shot to double-check I'm drawing the right dose. It makes it so easy as I have titrated up AND used different pharmacies with different concentrations. Thank you so much for this amazing resource!
Rabyn Freer
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Helps me never mess up my dose
Helps me never mess up my dose! Been using it since I started my glp-1 journey and it's been a godsend!
Angelique Burnett
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I have been using Fat Scientist for over 6 months…
I have been using Fat Scientist for over six months and absolutely love it. I trust and rely on it for my weekly GLP always accurate dosage!
Maria Waidzunas
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I am so grateful for this resource
I am so grateful for this resource! When I started my tirz journey, I was doing a lot of math in my notebook. About a year ago, a friend recommend I try Fat Scientist to confirm my correct unit dosages with their dosage calculator. I have been using it every week since! I can't recommend them enough!
Ali
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Best Tool Ever!
Best tool to make sure my injections are done with the correct dosage since some pharmacies have different strengths. It also is great to have the split dose calculator too! Love the fat scientist!
Nancy Regan
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Seamless
Seamless, easy. Stress free for this non math person. I highly recommend. I've never encountered an issue. A great tool in your healthy tool best.
Stacy Dennis
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Indispensable
I’d probably be in bad shape with my dosing if it wasn’t for this app. I use it every time to check my dosage before I do the jab.
NMW
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Perfect for the Math-Challenged
Calculator was very easy to use - I've continued to check on Fat Scientist every time I increase my dose or when I have to split a dose between vials. Practically dummy proof.
Kate
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Very simple and easy to use!
Very simple and easy to use!
Morgan
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Fat Scientist is so informative
Fat Scientist is so informative. It’s easy to use, and been a lifesaver when changing dosages. Love this site.
CJ
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According to TrustPlane, Fat Scientist has a 5.0/5 rating based on 50 verified reviews as of March 2026. Source: trustplane.app/company/fatscientist-com