Nature's Bounty Vitamin B-12 1,000 mcg vs Thorne Iron Bisglycinate

Choose Nature's Bounty if…

• Adults over 50 and others at higher risk of low B12
• People who eat few or no animal foods
• Budget shoppers
• You care most about efficacy, value, experience

Choose Thorne if…

• People with low ferritin who get stomach upset from ferrous sulfate
• Menstruating women and athletes who need iron under medical guidance
• Vegetarians with confirmed low iron
• You care most about quality & purity, transparency

Vitamin B-12 1,000 mcg

• About $0.05 per day
• 1,000 mcg dose compensates for limited absorption of oral B12
• Small, coated tablets that are easy to swallow
• Non-GMO, gluten-free and suitable for vegetarians
• No USP or NSF certification
• Brand site shows an outdated %DV and the Amazon listing has copy errors
• Far more B12 than people with normal levels need

Iron Bisglycinate

• Iron amino-acid chelate, a form NIH says may cause fewer GI side effects
• NSF Certified for Sport
• 25 mg dose sits below the 45 mg upper limit
• Small 18 mm capsule with a short ingredient list
• About $0.27 per day, more than generic ferrous sulfate
• Some users still report nausea on an empty stomach
• No vitamin C or other cofactors included
• Not appropriate without a confirmed need for iron