NOW Foods Vitamin C-1000 Sustained Release vs Thorne Iron Bisglycinate

Choose NOW Foods if…

• People with low fruit and vegetable intake
• Smokers and endurance athletes
• Budget shoppers who want a large bottle
• You care most about value

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 efficacy, quality & purity, experience

Vitamin C-1000 Sustained Release

• About $0.06 per day
• 1,000 mg dose stays well under the 2,000 mg upper limit
• Vegan, kosher and halal, made without major allergens
• GMP-certified manufacturing
• Far above daily needs, and absorption drops below 50% above 1 g
• Large oval tablet with a noticeable vitamin smell
• No evidence offered for the sustained-release design
• No USP or NSF certification

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