honestly that video was surprising on how safe zinc is. I mean he went so beyond anything close to a reasonable dose. bro was eating tubes of dental paste.
asveikau · 2h ago
This is a weird video to see after one of my son's doctors told me I should supplement him with zinc. Of course I'm following dosage recommendations.
burnt-resistor · 1h ago
If there's a real deficiency, it should be managed with blood tests.
Growing up and recently, I've been anemic (iron deficient) without any obvious medical cause. That requires supplementation with an unusual amount of iron.
Also, I'm vitamin A deficient at baseline and have to take large amounts, around 15k IU/day, to stay within the "normal" range. (50% above ordinary UL.)
ggm · 2h ago
In cell cultures. So nothing about topical, or digestive pathways. Just, expose cells to vitamin c rich medium.
How would topical application work, and what kind of homeostasis effect, from ingestion.
If you are low on vitamin c in your diet, sure. If not, you may not get much benefit from having more.
woleium · 3h ago
So possible treatment for age related thinning of the skin.
kanbankaren · 3h ago
Well, there are already multiple skin creams with Vitamin C. They have been available for a long time, but they are expensive for what it provides.
Just taking a 500mg x 2 Vitamin C supplements should provide enough for skin repair.
inkyoto · 2h ago
Let's not engage in quakery and resort to knowledge instead.
Oral and transdermal (topical) application of Vitamin C (and other molecules in general) follow completely different routes with different absorption rates and accompanying nuances.
Oral intake. Absorption rate is dosage dependent:
– At moderate doses (≤ 250 mg/day): 70–90 per cent of ascorbate is absorbed into the bloodstream. Bloodstream means just that – Vitamin C will be distributed throughout the entire body, which includes tissues, internal organs and skin. Active absorption takes place in the small intestine predominantly by SVCT1 and SVCT2 sodium-ascorbate co-transporters.
– At high doses (≥ 1g a day): passive diffusion takes over and also takes place in the small intestine although now via GLUT transporters that become saturated and absorption efficiency drops to 50 per cent or lower.
The half-life of Vitamin C taken orally is approximately four hours anyway, after which any excess of it still circulating will be rapidly excreted via the renal route (kidneys). Studies report that significantly less than 0.1 per cent makes into the epidermal (skin) layer.
Transdermal (topical) application. Depends on the concentration and several factors, but a 20% concentration serum (not a cream) can achieve a > 80% absorption rate through the skin into receptor fluid after 24 hours. Half-life of Vitamin C applied topically is approximately 4 days.
Recap: less than < 0.1 % / 4 hours half-life for the oral route vs more than 80 % / 4 days half-life for the transdermal route.
kanbankaren · 2h ago
Is the 80% absorbed Vitamin C through transdermal route cross the epidermis & dermis layers?
MangoToupe · 3h ago
Therapy is another option
ch4s3 · 2h ago
Red light, or something more chemical?
MangoToupe · 2h ago
Ah I should have said "psychotherapy" to get the joke across better
deadbabe · 3h ago
This is why you need to include a good vitamin C serum in your daily skincare routine.
m463 · 1h ago
"I always use an after-shave lotion with little
or no alcohol because alcohol dries your face out and makes
you look older. Then moisturizer, then an anti-aging eye
balm, followed by a final moisturizing "protective" lotion..."
Bateman stares into the mirror. The masque has dried,
giving his face a strange distorted look as if it has been
wrapped in plastic. He begins slowly peeling the gel masque
off his face.
ipnon · 23m ago
“Looking good doesn’t affect your success” is one of those pernicious anti-advices like “elite university degrees don’t matter” and “family connections are worthless in our meritocratic society.”
https://youtu.be/oeyt2zVqCG8
Growing up and recently, I've been anemic (iron deficient) without any obvious medical cause. That requires supplementation with an unusual amount of iron.
Also, I'm vitamin A deficient at baseline and have to take large amounts, around 15k IU/day, to stay within the "normal" range. (50% above ordinary UL.)
How would topical application work, and what kind of homeostasis effect, from ingestion.
If you are low on vitamin c in your diet, sure. If not, you may not get much benefit from having more.
Just taking a 500mg x 2 Vitamin C supplements should provide enough for skin repair.
Oral and transdermal (topical) application of Vitamin C (and other molecules in general) follow completely different routes with different absorption rates and accompanying nuances.
Oral intake. Absorption rate is dosage dependent:
The half-life of Vitamin C taken orally is approximately four hours anyway, after which any excess of it still circulating will be rapidly excreted via the renal route (kidneys). Studies report that significantly less than 0.1 per cent makes into the epidermal (skin) layer.Transdermal (topical) application. Depends on the concentration and several factors, but a 20% concentration serum (not a cream) can achieve a > 80% absorption rate through the skin into receptor fluid after 24 hours. Half-life of Vitamin C applied topically is approximately 4 days.
Recap: less than < 0.1 % / 4 hours half-life for the oral route vs more than 80 % / 4 days half-life for the transdermal route.
Bateman stares into the mirror. The masque has dried, giving his face a strange distorted look as if it has been wrapped in plastic. He begins slowly peeling the gel masque off his face.