Collagen and Biotin: study protocols

4 study groups took Collagen together with Biotin. These are the doses the studies gave. They are not a recommendation.

Fewer than 5 study groups in one unit match, too few to draw the chart.

Commonly used together

4 of 4 study groups took Collagen and Biotin with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

Taken with	Study groups
Vitamin C	3

4 study groups

Study
A Collagen Supplement Improves Skin Hydration, Elasticity, Roughness, and Density: Results of a Randomized, Placebo-Controlled, Blind Study 2019 · verum group · Women aged 35–73 with healthy skin	2.5 g	50 mcg	12 weeks	36
A Dermonutrient Containing Special Collagen Peptides Improves Skin Structure and Function: A Randomized, Placebo-Controlled, Triple-Blind Trial Using Confocal Laser Scanning Microscopy on the Cosmetic Effects and Tolerance of a Drinkable Collagen Supplement 2020 · test product (Elasten) · Women aged 40–70 years; healthy, without a stated skin disease	2.5 g	50 mcg	12 weeks	30
Skin Anti-Aging Efficacy of Enzyme-Treated Supercritical Caviar Extract: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial 2023 · combination group · Adults aged 30–60 years with crow’s feet wrinkle grade 3 or higher and low cheek moisture; all sexes.	500 mg	7.5 mg	8 weeks	15
Effects of a Combination of Water-Soluble CoenzymeQ10 and Collagen on Skin Parameters and Condition:Results of a Randomised, Placebo-Controlled,Double-Blind Study 2020 · test group · Healthy Caucasian women aged 40–65 with signs of skin aging	4 g	150 mcg	12 weeks	17