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Show HN: A body-mass weighted caffeine limit simulator for developers

https://thehealthytechpro.com/daily-caffeine-intake-calculator/
1•thehealthytech•2h ago
Most caffeine guidelines are a "flat 400mg," but pharmacologically, that makes no sense. A 100kg engineer and a 50kg engineer shouldn't have the same safety ceiling.

I built this tool to move beyond the "one-size-fits-all" FDA recommendation. It calculates your personalized limit using a weight-based pharmacokinetic safe-dose formula (standard 3-6 mg/kg) while factoring in physiological states like age and pregnancy that alter metabolic clearance rates.

Technical Logic: > - Uses a weight-based scalar for personalized limits.

Implements strict conditional logic for pregnancy/adolescent safety thresholds (capping at 200mg/100mg respectively).

Aiming to bridge the gap between "standard wellness" and actual biological data-points.

URL: https://thehealthytechpro.com/daily-caffeine-intake-calculat...

Comments

testforge•2h ago
Interesting. I could benefit from this, although it would be nice to have the option to use pounds instead of kg.
thehealthytech•1h ago
Great point. I stuck with kg for the initial build since the pharmacokinetic formulas in the medical literature are almost universally SI-based, but I definitely see the friction for US-based users.

I’ll add a lbs/kg toggle to the roadmap and push an update later today. Thanks for the feedback!

Show HN: Learn Arabic with spaced repetition and comprehensible input

https://abjadpro.com
1•adangit•44s ago•0 comments

Show HN: KeyID – Free email and phone infrastructure for AI agents (MCP)

https://keyid.ai/
1•vasilyt•1m ago•0 comments

'God, It's Terrifying': How The Pentagon Got Hooked on AI War Machines

https://www.bloomberg.com/news/features/2026-03-12/iran-war-tests-project-maven-us-ai-war-strategy
1•1vuio0pswjnm7•3m ago•0 comments

Meta is killing end-to-end encryption in Instagram DMs

https://www.engadget.com/social-media/meta-is-killing-end-to-end-encryption-in-instagram-dms-1952...
1•bookofjoe•5m ago•0 comments

Minimal – open-source hardened container images now publish cve info

https://rtvkiz.github.io/minimal/
2•theoo21•6m ago•0 comments

Building my own cloud in 3 months

https://kykvit.com/blog/opinions/Claude_Experiment_-_FlyingFish/
1•kykat•6m ago•1 comments

My Boyfriend Is AI

https://old.reddit.com/r/MyBoyfriendIsAI/
1•heavyset_go•7m ago•0 comments

We built RLM for coding. Swarm native agents are here to stay

https://twitter.com/realmcore_/status/2032146316730778004
1•gmays•8m ago•0 comments

'Pokémon Go' players have been unknowingly training delivery robots

https://www.popsci.com/technology/pokemon-go-delivery-robots-crowdsourcing/
1•Brajeshwar•8m ago•0 comments

Show HN: TermHub – a terminal-style academic homepage template

https://github.com/H-Freax/TermHub
1•freaxruby•9m ago•0 comments

What to Do If You're a Data Breach Victim

https://www.nytimes.com/2026/03/13/your-money/data-breach-tips.html
1•saikatsg•9m ago•0 comments

CASA: Deterministic control plane for AI agents

https://github.com/The-Resonance-Institute/casa-runtime
1•cherndon222•10m ago•1 comments

I validated an idea with a Reddit post. 4,200 views. 60 comments

https://www.indiehackers.com/post/i-validated-a-saas-idea-with-one-reddit-post-before-writing-a-s...
1•jayesh_somani•11m ago•0 comments

Fin123

https://github.com/reckoning-machines/fin123-core
1•jedreckoning•11m ago•1 comments

OSI Adopts SPDX IDs for License URLs

https://opensource.org/blog/osi-adopts-spdx-ids-for-license-urls
1•gslin•14m ago•0 comments

Making GPT More Effective with Realistic Corporate Spreadsheets

https://www.credal.ai/blog/optimizing-gpt-corporate-data
1•jackfischer•16m ago•0 comments

Windows 11 gains ability to customize local user directory during setup

https://www.windowscentral.com/microsoft/windows-11/microsoft-just-fixed-my-biggest-gripe-about-t...
1•thunderbong•18m ago•0 comments

An Ode to Bzip

https://purplesyringa.moe/blog/an-ode-to-bzip/
2•signa11•23m ago•0 comments

Don't PUA Your AI

https://github.com/wuji-labs/nopua
1•fernvenue•24m ago•0 comments

Microsoft confirms Windows 11 bug crippling PCs and making drive C inaccessible

https://www.neowin.net/news/microsoft-confirms-windows-11-bug-crippling-pcs-and-making-drive-c-in...
2•signa11•25m ago•0 comments

Ask HN: Did your boss use AI to determine the quality of your work?

1•amelius•26m ago•2 comments

Parsing semiconductor datasheets into structured register maps for under $0.25

https://regforge.dev/blog/datasheet-parsing
2•coleman2247•27m ago•1 comments

Realistic Benchmarks for Financial AI

https://labs.taktile.com/benchmarks
1•tlarkworthy•28m ago•0 comments

Microplastics that accumulate in the body may 'clog up' immune cells

https://www.livescience.com/health/microplastics-that-accumulate-in-the-body-may-clog-up-immune-c...
2•Brajeshwar•30m ago•0 comments

Online astroturfing: A problem beyond disinformation

https://journals.sagepub.com/doi/10.1177/01914537221108467
2•xyzal•30m ago•0 comments

Show HN: TheDayAfter – open-source addiction recovery tracker

https://thedayafter.app/?o=hn
2•walky•32m ago•0 comments

Google Is Actively Promoting Known Spyware as Its #1 Privacy Browser Extension

https://old.reddit.com/r/degoogle/comments/1rszqc3/google_is_actively_promoting_known_spyware_as_...
5•z0ccc•33m ago•0 comments

Show HN: Screen studio alternative for windows (free and no watermark)

1•souhail_dev•37m ago•0 comments

Musk ousts more xAI founders as AI coding effort falters, FT reports

https://www.reuters.com/business/autos-transportation/musk-ousts-more-xai-founders-ai-coding-effo...
2•1vuio0pswjnm7•38m ago•0 comments

It's a Dimmer Switch

https://derek4thecws.substack.com/p/its-a-dimmer-switch
1•coach-d•38m ago•0 comments