Dr. Alexander Landfield
Board-Certified Neurologist & Medical Director
The supplement market for skin health is crowded with products making ambitious claims, but the evidence supporting these claims varies dramatically. At Rani Beauty Clinic in Renton, WA, Dr. Landfield provides evidence-based guidance on which supplements have genuine research support for skin health.
Vitamin C supplementation is well-supported for skin health when dietary intake is insufficient. As an essential cofactor for collagen synthesis and a potent antioxidant, vitamin C supports skin from within. However, most people who eat adequate fruits and vegetables already have sufficient levels. Supplementation primarily benefits those with suboptimal dietary intake.
Vitamin D supplementation is strongly supported, particularly in the Pacific Northwest where sun exposure is limited. Vitamin D supports immune function, cell growth, and inflammatory regulation, all of which affect skin health. Our wellness injection program provides vitamin D3 for patients with documented deficiency.
Omega-3 supplements benefit patients who do not consume fish regularly. The anti-inflammatory effects of EPA and DHA from fish oil reduce systemic inflammation that contributes to skin aging and inflammatory skin conditions. Two to three grams daily of combined EPA and DHA is the researched dose.
Collagen peptide supplements have growing research support. Several clinical studies demonstrate modest improvements in skin hydration, elasticity, and wrinkle depth with daily supplementation of five to ten grams. While the body must digest collagen before reassembling it, the resulting amino acid profile may preferentially support collagen synthesis.
Zinc supplementation benefits patients with deficiency, which is common in vegetarians and those with digestive conditions. Zinc supports wound healing, immune function, and cell division. Excessive zinc supplementation can cause copper deficiency, so balanced dosing is important.
Biotin is one of the most marketed skin supplements despite limited evidence for benefit in people without biotin deficiency, which is rare. Hair, skin, and nail supplements containing biotin provide minimal benefit for most users and can interfere with certain laboratory tests.
At Rani Beauty Clinic, we recommend addressing specific nutritional deficiencies rather than taking blanket supplements. Our wellness injection protocols provide targeted supplementation with guaranteed bioavailability.
