Very easy to use and straightforward.
Reply from Fat Scientist2026-03-15
Thanks Sandra, that's what we're shooting for! Simplicity, accuracy, and ease-of-use.
About Fat Scientist
Data updated- Website
- fatscientist.com
- Category
- Public & Local Services
- Location
- United States
- Status
- Unclaimed
- Last 12 months
- 62 reviews
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Is Fat Scientist legit?
Fat Scientist (fatscientist.com) has a 5.0 out of 5 rating on OK.one, based on 62 user reviews collected here. It is listed under Public & Local Services and its reputation is excellent. Praise is nearly unanimous, with 100% rating it 4 stars or higher. Last updated 2026-08-10.
What people say
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!
Reply from Fat Scientist2026-03-15
Thanks Rebecca, so glad Fat Scientist can be your companion on this journey!
Fat Scientist is an absolutely must
Fat Scientist is an absolutely must to safely calculate your Glp dose! And as a beginner, there are many helpful guides to get you started on your weight loss journey.
Reply from Fat Scientist2026-03-15
Thanks Fritter! Very glad to hear that the guides and educational material were useful to you.
Extremely helpful tool with accurate…
Extremely helpful tool with accurate dosing calculations. Highly recommend!
Reply from Fat Scientist2026-03-15
Thank you, Sheri!
This calculator is FANTASTIC
This calculator is FANTASTIC. Super user friendly.
Reply from Fat Scientist2026-03-15
Thanks Candice! We aim for clarity, simplicity, accuracy, and ease-of-use. So glad to be of help!
Helpful Resource
This is such a helpful website to verify dosage, especially when changing vials with a different concentration or increasing dose on the same vial. I have also used it when changing my shot day with the split dose calculator to keep the weekly level similar.
Reply from Fat Scientist2026-03-15
Thanks Laura! Those are two of the trickier scenarios to navigate — concentration changes and mid-week shot day adjustments — so really glad the calculators have been able to help with both!
Excellent medication safety check!
Very helpful when i need to adjust my medication dose and double check my calculations. I never skip this as a safety check. Its so quick and easy to use.
Reply from Fat Scientist2026-03-15
Thanks Kim! Really glad Fat Scientist has become a reliable part of your routine.
Awesome website to help with all kinds…
Awesome website to help with all kinds of GLP dosing. My go to place to figure out anything related to dose management.
Reply from Fat Scientist2026-03-15
Thanks Lawrence! Really glad Fat Scientist has become your go-to for dose management — that's exactly the role we're hoping to fill.
Simple and Easy!
Simple, easy-to-use calculator that has evolved with feedback from users and is now a great all-around resource for both newbies and experienced GLP users. Thank you, Ted!!
Reply from Fat Scientist2026-03-15
Thank you! Love hearing that it works for both newcomers and veterans alike — and yes, user feedback has genuinely shaped a lot of what the site has become.
So helpful!
This site is the best! It’s so nice to double check your dosage when titrating up or down or just to have a comfort level that you’re doing it correctly.
Reply from Fat Scientist2026-03-15
Thanks Jamie! That peace of mind when titrating — knowing you've got the right number — is exactly what Fat Scientist is here for.
The dose calculator is a game changer…
The dose calculator is a game changer when figuring out/checking my tirzepatide dose. It has given me peace of mind and saved me so much time and math.
Reply from Fat Scientist2026-03-15
Thanks Lauren! Peace of mind on shot day is exactly what we're going for. So glad Fat Scientist has been able to save you the mental math!
I use fat scientist weekly and rely on…
I use fat scientist weekly and rely on it heavily! Absolutely no complaints and would recommend fat scientist to any friends and family.
Reply from Fat Scientist2026-03-15
Thanks Zack! Really appreciate you spreading the word to friends and family — that means a lot to us.
I’m in maintenance now but still use…
I’m in maintenance now but still use fat scientist website to double check my dose every week! Wonderful site. Love the split dose calculator as well.
Reply from Fat Scientist2026-03-15
Congrats on maintenance! So glad Fat Scientist is still a useful part of your weekly check-in, and that the split dose calculator has come in handy too.
Great for double check or find your dosing
Reply from Fat Scientist2026-03-15
Thanks Mary! Glad Fat Scientist has been a useful double-check for you.
Easy to use, good interface
Easy to use, works well on laptop of mobile, takes the guessing out of dosing
Reply from Fat Scientist2026-03-15
Thanks Mark! Glad it works well across devices — and yes, taking the guesswork out of dosing is exactly the point.
Excellent website to calculate dosage…
Excellent website to calculate dosage based on mg needed. Also love the reverse dosage calculator that I use when splitting doses between vials (before the split dosage calculator was available). I’ve been using this site for over a year and have not had any issues.
Reply from Fat Scientist2026-03-15
Thanks Lisa! So glad the reverse dose calculator has been useful, especially for those tricky between-vial situations. Really appreciate you using Fat Scientist for so long!
Helpful trustworthy info
Reply from Fat Scientist2026-03-15
Thank you Michelle! 🙏
If you are on a GLP1 weight loss…A must visit!
If you are on a GLP1 weight loss journey, this Fat Scientist is an invaluable resource!
Reply from Fat Scientist2026-03-15
Thanks Christopher! Really glad Fat Scientist has been a valuable resource on your journey.
I saw this app discussed in my tirz sub…
I saw this app discussed in my tirz sub and used it for the first time this morning. I received new vials yesterday and wanted to dose at a smaller dose for my first dose of Tirz without B6. Highly recommend
Reply from Fat Scientist2026-03-15
Thanks Jacki! Really glad the tirz community led you here — welcome, and hope Fat Scientist continues to be a useful companion on your journey!
Still using it a year later
I've been on compounded Tirzepatide for over a year and still double check my dose every week with Fat Scientist. It's a wonderful resource for learning how to read and understand your vials and dosage.
Reply from Fat Scientist2026-03-15
Thanks Addie! So glad Fat Scientist has become a reliable part of your routine.