#uv-a

High animal-low plant, seasonal keto, walking/rucking, lift weights, sprint/HIIT, get cold, get hot, get sun, avoid blue light at night, avoid PUFA’s, especially linoleic//omega-6’s

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紫外線とお肌の関係が以下です。 UV-Aは、肌の奥まで到達してシワ、たるみの原因になります。 UV-Bは、肌の表面に作用してシミ、肌荒れ、日焼けを起こします。   日焼け止めの防止効果については UV-Aは、PA UV-Bは、SPF で表示されます。それぞれ数値が大きいほうが効果が高いです。 PA++++ SPF50+ などのように表記されています。 楽天【日焼け止め☆売れ筋ランキング】 アマゾン【日焼け止めまとめ】     波長について UV-Aは、300ぐらいから400nmあたりまで。 UV-Bは、300ぐらい以下   地表面に届く量としてはUV-BよりUV-Aのほうが多いです。 UV-Aの防止効果の表記はPAです。PAが大きいほうが安心ですね。   さて、ガラスやアクリルはどれぐらい紫外線を遮断してくれるのでしょうか。 以下がそのグラフです。 ガラスやUVカットのアクリル…

https://www.ncbi.nlm.nih.gov/pubmed/31170016/

“Morning exposure to sunlight increases core body temperature, alerting, cognition and brain serotonin levels which enhance mood and vitality. As the day progresses, peak cognition occurs commensurate with maximal core body temperature. By evening, SCN actively inhibit cortisol secretion for recovery from the morning surge and initiate pineal secretion of the hormone melatonin which reduces alertness and decreases core body temperature. As sleep ensues, its slow wave stages and SCN suppression reduce cortisol to a healthy daily nadir as SCN orchestrate a nightly surge of melatonin and other sleep-related hormones.”

https://bjo.bmj.com/content/92/11/1439.full

https://www.ncbi.nlm.nih.gov/m/pubmed/11801266/

https://www.ncbi.nlm.nih.gov/pubmed/16494083/

https://www.ncbi.nlm.nih.gov/pubmed/15585546/

In the presence of UV-A and IR light, melatonin is produced in the eye in combination with Tryptophan, the aromatic amino acid.

Only after 3-4 hours of total darkness (read: no 495–570nm light) is this melatonin loosed from your Pineal Gland and into your body to begin sleep.

So what does this mean?

MISS THE SUNRISE, YOU MISS THE MELATONIN

It's that simple.

You can synthesize some during the day as the full solar spectrum contains UV-A and IR light, but it is the proportion and time of day that matters.

The morning Sun pours its goodness into your body via the eye and you release this magical sleep serum via blue blockers at night.

Blue blockers weren't necessary until electric lighting became ubiquitous.

You know what else became common after electric lighting?

Nearly every disease plaguing modern man.

Especially cancer. Melatonin inhibits tumor metastasis. According to the statistics, if you're going to die from cancer, it's due to the metastasis.

Make time for sunrise. It might just save your life.