Methylene Blue Serum: Morning or Night?
One of the most common questions about methylene blue serums is when to put them on. The short version is that timing is flexible. What matters more is where it sits in your routine and what else you're using.
In short: you can use a methylene blue serum in the morning, at night, or both. It is not a photosensitiser, so it doesn't need to be kept to evenings like a retinoid. Morning use pairs naturally with SPF as part of daytime antioxidant protection; if you also use a retinoid or strong acid, keep those at night and methylene blue in the morning. Apply it after cleansing and before moisturiser.
Where it goes in your routine
Cleanse
Leave skin slightly damp. Water-based serums spread and absorb better that way.
Methylene blue serum
Two to three drops pressed into face and neck. Give it about a minute.
Moisturiser
Seals in the serum and supports the barrier.
SPF 30+ (morning only)
Always the last step in the morning.
Which routine suits you
| Your routine | Morning | Night |
|---|---|---|
| No other actives | Methylene blue, moisturiser, SPF | Methylene blue, moisturiser (optional) |
| Using a retinoid | Methylene blue, moisturiser, SPF | Retinoid, moisturiser |
| Using vitamin C | Either vitamin C or methylene blue, then SPF | Methylene blue, moisturiser |
| Using exfoliating acids | Methylene blue, moisturiser, SPF | Acid on its nights; methylene blue on the others |
| Sensitive skin, just starting | Nothing new yet | Methylene blue every other night for a week |
For more on combinations, see methylene blue vs vitamin C, methylene blue vs retinol and how to use Skintervene.
Frequently asked questions
Should I use methylene blue in the morning or at night?
Either, or both. It isn't a photosensitiser. Morning use pairs well with SPF; if you use a retinoid or strong acid, keep those at night and methylene blue in the morning.
Can I use methylene blue twice a day?
Yes, once your skin is used to it. If your skin is sensitive, start with every other evening for a week.
Do I need SPF with methylene blue?
Methylene blue doesn't make skin more sun-sensitive the way retinoids can, but daily SPF 30 or above is still the single most important step for skin ageing.
Does methylene blue go before or after moisturiser?
Before. Apply serums to clean skin, then moisturiser, then SPF in the morning.
General information about cosmetic use, not medical advice.
Formulated on what the evidence supports
One serum. Nine actives. Methylene blue at cosmetic concentration. Made in London.
Shop the serumThis page is general information about cosmetic ingredients and is not medical advice.