Most nonprofit revenue isn't from charitable giving (think healthcare, education, etc):
https://taxfoundation.org/blog/501c3-nonprofit-revenue/
https://projects.propublica.org/nonprofits/search

Most American charitable giving was across hundreds of thousands of religious organizations:
https://www.philanthropyroundtable.org/magazine/less-god-less-giving/

But these organizations receive the most donations:
https://forum.effectivealtruism.org/posts/BpEt8DqrcAhKJbtfJ/america-s-100-charities-receiving-most-donations

I do not discuss B12
I also plan to continue my D3 supplementation
Do you think there is evidence that not taking a multivitamin-multimineral

That multivitamin-multimineral contains B12 and D3 btw

Still seems reductively worded? Serious deficiencies like B12 impair sustaining any income. I wouldn't risk cognitive health over ~$10/month

Myopic calculating based on lifespan.. vitamins like B12, creatine, and omega-3 improve mental/cognitive health, especially for vegans and vegetarians

Google Shopping, Amazon, and AliExpress do not seem to support even the most basic constraints

I agree with your frustrations around those sites, but more structured ecommerce sites seemingly exist: https://mcmaster.com. Perhaps more common/valued in B2B than B2C?

considered joining the team at Metaculus or Manifold Markets

@DPiepgrass furthering this recommendation with Kalshi/Polymarket/ForecastEx/PredictIt/etc. Real money prediction markets address your growth theory concerns

Easter (April 20th this year) is another unique opportunity:
Likely less defensiveness addressing annual egg decorating/tossing/hiding/etc. than confronting daily diets

@VilleSokk created a similar calculator:
https://foodimpacts.org
https://forum.effectivealtruism.org/posts/KLqAiKpMpBCLCH6x7/ranking-animal-foods-based-on-suffering-and-ghg-emissions
FarmKind's donation call-to-action is a great add; you all should link up :)

Offsetting has multiplier effects.. people constantly make significant sacrifices attempting to marginally improve their personal sustainability, so publicly offsetting decades worth of personal impact with a weeks' earnings seems worth the statement

NB: I'd consider them regardless, but offsetting's a solid nudge 

Offset objections narrowly focus on future behavior; most people are raised omnivore; I'm offsetting past consumption:

https://forum.effectivealtruism.org/posts/HJtfDKDdFFHhDiJXM/recommendations-for-charities-for-animal-suffering-offsets?commentId=iq3SrK9K2q8zwsuBL