My go-to vegan Vitamin C for immune support—soy-free, gluten-free, and effective in divided doses.
As a long-time user, I rely on Doctor's Best Vegan Vitamin C for immune strength—soy/gluten-free, easy divided doses with meals. Lifesaver!
This is a review of product:
Doctor's Best Vitamin C with Q-C, Immune Support, Non-GMO, Gluten Free, Soy Free, Vegan 360 Veggie Caps
From Amazon.com
I trust Doctor's Best brand and this product. It works well for me and I have been taking it for many years. It helps keep my immune system strong. It is vegan, soy free and gluten free.
Recently, I have increased the dosage because I learned from a Doctor that our bodies do not produce vitamin C nor can assimilate large amounts of vitamin C at one time. It was recommended to take it after breakfast, after lunch and after dinner.
I am very pleased with this product and recommend it.
Vitamin Basics & Tips
Why Humans Can't Produce Vitamin C
Unlike most animals, humans lack the L-gulonolactone oxidase enzyme required to synthesize vitamin C. This genetic mutation occurred evolutionarily, making dietary intake essential for immune function and collagen production.
Optimal Vitamin C Absorption Strategy
Taking smaller doses (250-500mg) 2-3 times daily aligns with the body's sodium-dependent active transport system, which becomes saturated at ~200mg per dose. This prevents urinary excretion of excess vitamin C.
Significance of Vegan Certification
Vegan supplements like Doctor's Best use cellulose-based capsules instead of gelatin, avoiding animal derivatives. This also eliminates common allergens like dairy or egg residues found in some capsules.
Soy/Gluten-Free Benefits
Soy-free formulas prevent phytoestrogen exposure, while gluten-free certification ensures safety for celiac patients. Both reduce inflammatory risks for sensitive users.
Daily Vitamin C Requirements
The RDA is 90mg for men and 75mg for women, but studies show 200mg daily achieves plasma saturation. Smokers need +35mg due to oxidative stress.
Food Sources vs Supplements
While citrus fruits and bell peppers provide vitamin C, heat during cooking destroys 30-50% of content. Supplements offer standardized dosing, crucial for therapeutic needs.
Choosing Bioavailable Forms
Doctor's Best uses ascorbic acid—the most researched form. Buffered options (sodium/calcium ascorbate) suit sensitive stomachs but contain minimal additives.
FAQ: Can Vitamin C Cause Kidney Stones?
Large doses (>2,000mg/day) may increase oxalate excretion, but studies show no significant stone risk below 1,000mg. Always hydrate well when supplementing.
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