Vitamin C is one of the most well-evidenced vitamins in nutritional science — and one of the most important during periods of significant dietary change. As an antioxidant, immune cofactor, collagen synthesis enabler, and iron absorption enhancer, vitamin C’s roles become particularly relevant when food intake is reduced and the body is undergoing rapid physical change.
Why vitamin C matters during weight loss
| Function | Relevance during weight loss |
|---|---|
| Collagen synthesis cofactor | Essential for skin repair and elasticity during body composition change |
| Iron absorption enhancement | Takes non-haem iron (from plant sources) from ~5% to ~15% absorption — important on reduced-meat diets |
| Immune function | Calorie restriction moderately suppresses immune function — vitamin C supports normal immune response |
| Antioxidant protection | Rapid fat cell breakdown during weight loss releases free radicals — antioxidant protection is relevant |
| Cortisol modulation | Vitamin C is concentrated in the adrenal glands; high-stress periods deplete stores rapidly |
Vitamin C vs alternatives
| Product | Form | Dose | Price/month |
|---|---|---|---|
| Lily & Loaf Vitamin C | Ascorbic acid | Check label | ~£10–15 |
| Solgar Vitamin C 1000mg | Ascorbic acid | 1,000mg | ~£15 |
| Liposomal Vitamin C | Liposomal (higher bioavailability) | 500–1,000mg | ~£20–30 |
For most people, standard ascorbic acid at 500–1,000mg/day is effective and affordable. Liposomal vitamin C offers better absorption at higher doses for people with specific immune needs. Buffered vitamin C (calcium ascorbate) is gentler on the stomach for people with GI sensitivity — relevant for GLP-1 users.
Lily & Loaf — Recommended Pick
Vitamin C
✅ 90-day money-back guarantee | ✅ Free UK delivery over £40 | ✅ UK-based brand
Ascorbic acid · Immune, antioxidant, and collagen support
Frequently Asked Questions
How much vitamin C do I need per day?
The UK NRV is 80mg per day. Therapeutic supplementation typically uses 500–1,000mg daily. The tolerable upper limit is 2,000mg — exceeding this regularly can cause digestive discomfort.
Does vitamin C help with hair loss on Mounjaro?
Vitamin C supports collagen synthesis and enhances iron absorption — both relevant for hair health. It is a supporting supplement alongside protein, iron, zinc, and vitamin D for hair loss prevention during weight loss.
Can I get enough vitamin C from food?
From a varied diet with adequate fruit and vegetables — yes. From a restricted diet during weight loss — often not. People on very low calorie diets or GLP-1 medication with significantly reduced food variety are at risk of insufficient vitamin C intake.
Related: Daily Essentials Bundle Review | Hair Loss on Mounjaro UK
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