Here are the recommended daily intake amounts for Landish marine collagen:
Pure Canadian Marine Collagen: 1.5 tbsp or 8.3 g (jar = 30 days/bag= 120 days)
Marine Collagen Beauty Blend: 1.5 tbsp or 10 g (jar = 30 days)
Marine Collagen Functional Coffee Creamer: 1.5-3 tbsp or 9-18 g (jar = 15-30 days)
While taking less than these amounts will still support collagen production, the beneficial effects are generally proportionate to the amount consumed.
Gradual improvements in skin hydration/firmness and nail growth/thickness should take effect at the pace of their respective growth/renewal cycles. This is generally 2-3 months but each individual is different depending on age and other factors.
For joint health, Health Canada recommends taking hydrolyzed collagen for at least 5 months to see beneficial effects (1).
References:
Health Canada (2021). Drug and Health Products. Hydrolyzed Collagen.