SPF Is Not Enough

A Holistic Summer Skin Protocol for Women

Every school holiday growing up looked the same. Packed suitcases, long journeys, and arriving somewhere that felt like both a foreign country and the most familiar place in the world — because that is what happens when your entire family emigrated as immigrant workers, built a life somewhere else, and then returned home again. You end up with roots in multiple soils, and I have always considered that one of the great gifts of my life. I can call more than one place on this earth home, and there is something quietly expansive about that.

But those holidays also meant the beach. Long, golden, glorious days at the beach — and my mother appearing at regular intervals with a bottle of SPF 50 that she applied to every visible centimetre of my body with the focused determination of someone who was not taking any arguments. The result was the kind of thick, white, oily cast that dried chalky on brown skin and clung to everything — sand, fabric, hair — for the rest of the day. I hated it with the particular intensity that only a child who wants to run into the water immediately can hate something.

I understand it now, completely. I am 28, and I look back at my mother standing on that beach with her SPF and her vigilance and I see exactly what it was: love, dressed as inconvenience. The urge to protect your children from damage — from the sun, from anything — does not require explanation. It comes from a place so instinctive it barely even counts as a decision.

What I also understand now, though, is that the story she was working with — the one most of us were handed — was incomplete. SPF is essential. It is the foundation, and I will defend it always, partly out of loyalty to every bottle my mother ever pressed into my reluctant skin. But it is not the whole protocol. Not even close.

And the more I have learned about what actually happens to skin under UV exposure — hormonally, nutritionally, biochemically — the more I've understood that what most of us are doing is roughly equivalent to locking the front door and leaving every window wide open.

Here is what the full picture looks like.

What Sunscreen Actually Does — And What It Doesn't

Let's start with an honest accounting of your SPF.

Sunscreen works by absorbing or reflecting UV radiation before it penetrates the skin. A broad-spectrum SPF 50 filters out approximately 98% of UVB rays — the ones responsible for sunburn and a significant portion of DNA damage — and, if it's genuinely broad-spectrum, offers meaningful UVA protection as well. UVA rays are the longer-wavelength rays that penetrate more deeply, driving collagen degradation and photoaging even when you can't feel them burning.

What sunscreen does not do is neutralise the free radicals that UV exposure generates inside the skin itself. UV radiation triggers a cascade of reactive oxygen species — unstable molecules that damage cell membranes, fragment DNA strands, degrade collagen and elastin, and activate the enzymes responsible for photoaging. Some of this oxidative damage happens even before the UV ray is fully blocked. Some unfolds in the minutes and hours after exposure, as the inflammatory response runs its course. Topical SPF intercepts the initial hit; it doesn't manage the biochemical aftermath.

This is why internal protection matters. And this is where diet, antioxidants, and lifestyle enter the protocol as genuine science — not wellness mythology.

A Brief Word on What's Inside Most Sunscreens

Before we go further, there is something that needs to be named — because it is one of the more uncomfortable paradoxes of modern skincare.

Many of the most widely used chemical sunscreen filters have raised serious questions in recent years. Oxybenzone, octinoxate, homosalate, and octisalate are among the most common. Research has found that several of these ingredients are absorbed into the bloodstream at concentrations that exceed the FDA's thresholds for safety without further study — meaning we do not yet have the long-term human data to fully assess their systemic effects. Oxybenzone in particular has shown endocrine-disrupting activity in cell and animal studies, and has been detected in breast milk, urine, and blood samples after topical application.

This is not a reason to abandon sunscreen. UV damage is real, cumulative, and serious. But it is a reason to be selective about what you put on your skin daily, and to understand that not all SPF formulas are equal.

The full breakdown of which ingredients to look for, which to put back on the shelf, and what the current research actually says — that deserves its own post, and it is coming. So stay close if you are curious about that, because the difference between a sunscreen that protects you and one that quietly adds to your toxic load is worth knowing. For now: mineral sunscreens based on zinc oxide and titanium dioxide are the most inert, well-researched, and endocrine-safe options available, and they are the ones I default to and will always recommend as a starting point.

Internal Sun Protection: The Science of Eating for Your Skin

The concept of dietary photoprotection has been quietly building in the research literature for years. A comprehensive review established that micronutrients — specifically carotenoids, vitamins E and C, and polyphenols — contribute to endogenous photoprotection by scavenging reactive oxygen species and modulating the inflammatory signalling triggered by UV exposure [1].

The critical caveat: minimum intervention periods of ten weeks were required before measurable photoprotective effects appeared in human studies [1]. This is not a "take this on Monday, protect your skin by Wednesday" situation. Internal sun protection is a slow build — a sustained investment in your skin's baseline resilience. Which means the time to start is now, before the high-UV season is at its most relentless.

Lycopene and tomatoes

The most robustly researched dietary photoprotective compound is lycopene — the carotenoid that gives tomatoes, watermelon, and red peppers their colour. A 2024 systematic review and meta-analysis of 21 human intervention trials found that tomato and lycopene supplementation was associated with measurable reductions in UV-induced skin redness, decreased markers of photoaging, and reduced pigmentation changes [2]. Notably, the whole-food tomato complex consistently outperformed isolated synthetic lycopene — a reminder that food matrix matters, and that eating a tomato is not the same as taking a pill.

Cooked tomatoes deliver significantly more bioavailable lycopene than raw. Tomato paste, roasted tomatoes with olive oil (fat increases absorption), watermelon, pink grapefruit — these are foods that taste like the season anyway. Let them do double duty.

Vitamins C and E

Both vitamin C and vitamin E have well-established roles in UV defence, and they work synergistically. Vitamin C is water-soluble and scavenges free radicals in the aqueous compartments of cells; vitamin E is fat-soluble and protects cell membranes from lipid peroxidation. Together, they cover more biological ground than either does alone, and vitamin C also regenerates oxidised vitamin E, effectively recycling your protection [1, 3].

Vitamin C is also essential for collagen synthesis. UV exposure both generates oxidative stress that depletes vitamin C stores and directly damages collagen. Dietary vitamin C from whole foods — kiwi, strawberries, peppers, citrus, leafy greens — provides more sustained tissue-level delivery than high-dose supplements, which are largely excreted beyond a certain threshold.

Polyphenols: green tea, resveratrol, and beyond

Polyphenols are the plant kingdom's own UV defence system — compounds produced by plants specifically to protect against solar radiation. When we eat them, they offer analogous protection in our own tissue. A well-cited review confirmed that green tea polyphenols, grape seed proanthocyanidins, and resveratrol all demonstrate photoprotective effects through anti-inflammatory, antioxidant, and DNA-repair mechanisms [4]. Matcha, dark berries, red grapes, dark chocolate with minimal sugar, and extra virgin olive oil are the foods to lean into — not as a supplement stack, but as the sustained, rhythmic background of a skin-supportive diet.

Omega-3 fatty acids

UV radiation triggers an inflammatory cascade in skin tissue, and omega-3 fatty acids modulate that cascade at the cellular level, reducing the production of pro-inflammatory prostaglandins triggered by UV exposure. They also support the structural integrity of cell membranes, making them more resilient to oxidative damage. Fatty fish, walnuts, flaxseed, chia seeds — think of omega-3s as the anti-inflammatory cushion under everything else.

The Hormonal Dimension: What Your Cycle Does to Your UV Sensitivity

This is the part of the conversation that gets left out almost everywhere. And for women, it changes the protocol in ways that matter.

Estrogen directly stimulates melanin production. It does this by activating tyrosinase — the rate-limiting enzyme in melanin synthesis — and by upregulating a receptor on melanocytes, the pigment-producing cells of the skin [5]. When estrogen is high, your skin's melanin machinery is running at higher output. This is the mechanism behind pregnancy mask, behind the facial darkening some women experience on the pill, and behind the subtle pigmentation shifts some women notice mid-cycle without ever connecting them to hormones.

Research found that women in the late luteal phase of their cycle — roughly the week before menstruation, when estrogen and progesterone are shifting — showed increased UV sensitivity and greater susceptibility to developing hyperpigmentation from sun exposure [5]. The skin barrier is weaker in this window, and melanocytes are more reactive to light-induced activation.

This is not a reason to fear your cycle. It is a reason to adjust your protocol. In the luteal phase, particularly in the final stretch before your period, the case for higher SPF, more rigorous reapplication, and avoiding peak UV hours — typically between 11am and 3pm — is stronger than at any other point in the month.

For women on estrogen-containing contraception, this heightened melanocyte sensitivity is essentially constant. If that is you, your hyperpigmentation risk in the sun is elevated compared to a naturally cycling woman, and your protocol should reflect that — more consistent internal antioxidant support, more consistent topical protection, and more awareness of the cumulative UV exposure you're building.

The Topical Protocol: What a Holistic Routine Actually Looks Like

SPF is the foundation. Non-negotiable, always. But the layers around it are where you move from basic protection to genuine skin health.

Morning

An antioxidant serum before SPF meaningfully enhances your protection. Vitamin C — L-ascorbic acid, ideally at 10–20% in a stable formulation — applied to clean skin before sunscreen neutralises free radicals at the surface level that SPF doesn't catch, and works synergistically with the vitamin E present in many modern SPF formulas. Apply it, let it absorb for a few minutes, then layer your SPF over the top.

Choose mineral SPF 50 as your default. Apply it generously — most people apply about 25–50% of the recommended quantity, which dramatically reduces the stated protection factor. And reapply every two hours if you are outdoors. SPF mists and powder SPFs exist precisely to make this realistic over makeup.

Evening

Your skin does its most significant repair work overnight. Support this with a retinoid — tretinoin if prescribed, retinaldehyde or retinol for over-the-counter options — to accelerate cell turnover and collagen production. Niacinamide (vitamin B3) is one of the most evidence-backed ingredients for reducing hyperpigmentation, supporting barrier function, and calming UV-induced inflammation.

If you're prone to pigmentation or in a hormonally sensitive phase of your cycle, a dedicated brightening ingredient — tranexamic acid, azelaic acid, or alpha arbutin — targets melanin synthesis enzymatically, working at the source rather than just at the surface.

Finish with a ceramide-based moisturiser to seal the lipid barrier that UV and environmental stress continually degrade. A compromised barrier means more UV penetration, more irritation, and more pigmentation risk. The moisturiser is not the indulgent last step. It is the seal on everything else.

The Lifestyle Pillars Nobody Frames as Skincare

Sleep is a skin issue. UV-induced oxidative stress generates a DNA damage load that the skin processes overnight. Sleep deprivation elevates cortisol, which suppresses the immune surveillance that clears damaged cells and disrupts the collagen synthesis that repairs photoaged tissue.

Stress is a skin issue. Elevated cortisol impairs barrier function and increases systemic inflammation — the same inflammation that UV exposure is already driving. A stressed skin is a more permeable, more reactive, more pigmentation-prone skin.

Hydration is a skin issue in a way most people underestimate. UV exposure increases transepidermal water loss. Dehydrated skin is more vulnerable, slower to repair, and less capable of mounting an effective antioxidant response. Water, hydrating foods, electrolytes in warm weather — these support the skin from the inside in ways no topical can fully substitute.

Coming Back to That Beach

My mother was right. She was always right, in the way that parents who are paying close attention tend to be right even when they can't fully articulate why.

She couldn't have told you about reactive oxygen species or melanocyte sensitivity or estrogen-driven hyperpigmentation. She just knew that the sun was powerful, that her children's skin needed protecting, and that she was going to do what she could. Every application of that white, sticky, sand-attracting SPF 50 was a small act of informed love.

What I'm doing now is building on what she started. The SPF is still there — better formulated, less chalky, infinitely more pleasant to wear — and around it is everything she didn't have access to: the dietary protocol, the cycle awareness, the evening repair routine, the understanding of what the sun is actually doing inside the skin and not just on its surface.

The beach is still one of my favourite places on earth. The sun still feels like something close to magic when it hits your face after a long stretch of grey days. I'm not interested in avoiding it. I'm interested in meeting it with everything I have — and making sure that twenty years from now, my skin still reflects a life lived in the light.

Your SPF is the starting line. Everything else is the race.

References

[1] Stahl, W., & Sies, H. (2004). Nutritional protection against skin damage from sunlight. Annual Review of Nutrition, 24, 173–200. https://doi.org/10.1146/annurev.nutr.24.012003.132320

[2] Zhang, X., Zhou, Q., Qi, Y., Chen, X., Deng, J., Zhang, Y., Li, R., & Fan, J. (2024). The effect of tomato and lycopene on clinical characteristics and molecular markers of UV-induced skin deterioration: A systematic review and meta-analysis of intervention trials. Critical Reviews in Food Science and Nutrition, 64(18), 6198–6217. https://doi.org/10.1080/10408398.2022.2164557

[3] Fernández-García, E. (2014). Skin protection against UV light by dietary antioxidants. Food & Function, 5(9), 1994–2003. https://doi.org/10.1039/c4fo00280f

[4] Afaq, F., & Mukhtar, H. (2010). Skin photoprotection by natural polyphenols: Anti-inflammatory, antioxidant and DNA repair mechanisms. Archives of Dermatological Research, 302(2), 71–83. https://doi.org/10.1007/s00403-009-0951-0

[5] Dlova, N. C., & Mosam, A. (2017). Catamenial hyperpigmentation: A review. Journal of Clinical and Aesthetic Dermatology, 10(12), 30–34. https://jcadonline.com/catamenial-hyperpigmentation/