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vitamin c and peptides together reddit these two shouldn't be used together

Published October Oct 17, 2026 7:51 AM

When exploring the world of advanced skincare, many enthusiasts often ask about the efficacy of using vitamin c and peptides together reddit communities frequently debate. As someone who has experimented with various topical formulations, I have found that the relationship between these two heavy hitters is nuanced, relying heavily on chemical stability and molecular integrity.

Understanding the Interaction

The primary concern regarding combining these ingredients stems from pH compatibility. Generally, peptides are chains of amino acids that function best at a neutral or slightly higher pH. Conversely, many potent forms of vitamin c, particularly L-ascorbic acid, require a low pH to penetrate the skin barrier effectively.

From my personal experience, the consensus is that you can use the two together if Peptides & vitamin c? : r/30PlusSkinCare you are mindful of formulation types. However, we would not recommend combining direct acids or vitamin c with peptides if you are using a low-pH serum, as peptides are denatured by acid. When this occurs, the structural integrity of the peptide is compromised, effectively rendering the product useless.

The Special Case of Copper Peptides

One of the most frequent warnings I encounter is that copper peptides and vitamin c shoul I see people suggestingVit C then Peptides, which I don't believe works under any scenario, even if you wait an hour to apply the peptide. The Read more d not be used together. Copper ions can act as an oxidizing agent, which may interact with L-ascorbic acid, leading to the oxidation of the vitamin and potentially neutralizing the benefits of th Copper peptides stimulate collagen like vitamin Cso I use it instead. For me combining CP with retinoids is too much, it compromised my skin Read more e copper. For those wondering where can I add these two in my routine, the most effective strategy is to use vitamin c in Where to add Vit C and Peptides? : r/30PlusSkinCare the morning and Peptides, vitamin c, and retinol : r/30PlusSkinCare the copper peptides in the evening. This ensures each ingredient operates in its ideal environment without interference.

Best Practices for Layering

If you are looking to incorporate both into your regimen, consider these observations:

* Wait Times: Some users suggest that you should wait 20–30 minutes between applications. However, others argue that vit c then peptides is ineffective regardless of the wait time if the chemical conflict exists.

* Alternative Timing: Since vitamin c stays in the skin after application for up to 48-72 hours, you can easily alternate days. This is often the best way to ensure you aren't sacrificing the efficacy of either.

* Formulation Matters: Peptides are generally fine with vitamin c if you use stable derivatives that don't require an extreme acidic environment.

* Avoidance: Many brands explicitly advise against using peptides with their vitamin c products that utilize L-ascorbic acid, so always check the manufacturer's guidance.

Personal Experience and Observations

In my own journey, I have Peptides & vitamin c? : r/30PlusSkinCare found that peptides are better overall than vit c for certain skin goals, while others prefer the brightening effects of vitamin C. If you are prone to sensitivity, remember that using these two acids together can cause irritation.

I have experimented with vitamin c + coq10 peptides in a single routine, but only when the vitamin C was a non-acidic derivative. If you are still confused about how to layer a vitamin c serum, start by observing how your skin reacts. If you notice pilling or redness, it is a sign that the combination may not be working in harmony.

Conclusion

Ultimately, while vitamin c will denature the peptides and make them ineffective if the pH is too low, t Where to add Vit C and Peptides? : r/30PlusSkinCare he two are not inherently enemies. By understanding that these two shouldn't be used together in their most aggressive, acidic forms, you can balance your routine effectively. Whether you choose to alternate mornings and nights or rely on stable derivatives, the goal is to ensure that both vitamin c and peptides have the opportunity to perform their functions without interference. Always prioritize the stability of your products to get the most out of your investment.

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