Jupiter remedies are kept on Thursday: chant Om Gram Greem Graum Sah Gurave Namah, donate yellow lentils (chana dal), turmeric, and keep the weekday fast. Yellow Sapphire is the graha's stone, but it should only be worn once Jupiter has been established as a functional benefic for your lagna.
Guru remedies are for wisdom, teachers and the moral compass — the graha of growth and good judgement. They are among the most commonly prescribed, which is exactly why the gemstone caution below matters.
An afflicted Jupiter reads as poor judgement, lost opportunities, difficulty with teachers or children, and a loss of faith in one’s own direction. Thursday observance and service to teachers are the classical answer.
The mantra, the weekday fast and the charity are safe for anyone — they address Jupiter without amplifying it. Yellow Sapphire is not: a planetary gem strengthens whatever the graha is already doing, so it needs a chart reading first.
Thursday. Fasting, charity and mantra japa for Jupiter all belong to that day.
The classical Sankhya is 19,000 repetitions, completed over weeks rather than at once. Begin with one mala — 108 — a day and build up; sincerity matters more than arithmetic.
Yellow Sapphire should be avoided by Taurus, Gemini, Virgo, Capricorn lagna, where the graha is a functional malefic and the stone amplifies exactly what you were trying to correct. Every lagna not listed as recommended needs the chart read first.