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Saffron Extract
Take saffron for a flat mood, and buy a named standardised extract or nothing.
Safflower Oil
Cook with high-oleic safflower. Don't take the high-linoleic kind for your heart.
SGLT2 Inhibitors
Take it if your heart or kidneys are failing. Skip it if you're chasing lifespan.
Royal Jelly
Put the royal jelly back. Nothing in that jar has ever raised a man's testosterone.
Riboflavin
If migraines run your month, take riboflavin daily. It's the cheapest thing that works.
Rhodiola rosea
Take rhodiola in the morning for burnout fatigue. Check the label for rosavins.
Reverse Osmosis Water Filtration
Fit the RO unit, then put the magnesium back in the water you drink.
Resistant Starch
Cook the rice, chill it overnight, eat it cold. Build up slow or you'll bloat.