any recommendations for a collagen supplement

Hydrolyzed collagen peptides are a reasonable option to try, optionally with vitamin C, but benefits—especially for skin—are mixed and not guaranteed.

• 15–30 g of collagen peptides daily: This is the suggested daily range for people who choose to supplement. 1
• Pair with 500–1,000 mg of vitamin C: It may support collagen’s use or synthesis; check whether the supplement already includes vitamin C. 2
• Bone broth: Beef or chicken bone broth is a dietary source of collagen. 3
• Keep expectations measured: Collagen is not a complete protein, and evidence for effects on skin, hair, and nails is not conclusive. 4 5