Katie Mullenfounder, marker 82 co (content creator + affiliate marketing)

Peptides 101: What time of day should you take them?

21 Jun 2026 · 0 min

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In this segment of the "Peptides 101" series, Katie Mullen shares her practical approach to timing peptide and regenerative supplement intake. She explains that she administers the regenerative peptide GHK right before bedtime, reasoning that sleep enhances the body’s natural repair processes and therefore maximizes the supplement’s effectiveness. Conversely, she takes more metabolically active peptides such as GLP (glucagon‑like peptide) earlier in the day, when the body is active and can better utilize their effects. Mullen notes that this schedule aligns with her personal experience and has yielded positive results, offering viewers a simple, experience‑based framework for planning their own peptide regimens.

Some questions I get are about like when you take GHK during the day. I actually take it at night before I go to bed because I saw someone that said taking any regenerative supplements before bed are really supported by sleep. So that made a lot of sense to me. And then any active supplements like GLPs, take kind of earlier in the day. So that's what I've been doing, taking GLPs during the day, GHK at night before bed, and I feel like that's been working out.