Written by the Nuvirox Research Team
Short answer: yes, and it's a combination of at least four separate structural changes, not one single cause. Jowls and neck sagging result from collagen and elastin decline in the skin itself, migration of facial fat pads, weakening of the ligaments that anchor tissue to the jaw, and even measurable resorption of the jawbone — all happening on overlapping but different timelines.
- Jowl and neck laxity come from four interacting processes: dermal collagen/elastin loss, fat pad descent, retaining ligament weakening, and jawbone resorption.
- Dermal collagen density declines roughly 1% per year starting in the mid-20s, while elastin (made mostly in childhood) isn't meaningfully replaced in adulthood.
- Oral collagen peptide trials show real but modest effects on skin hydration and texture; effects on elasticity specifically are less consistent across studies.
What actually causes jowls and a sagging jawline?
Facial anatomy research has identified four largely independent processes that combine to create visible jowls: dermal collagen and elastin loss (making skin thinner and less able to spring back), descent and deflation of the discrete facial fat compartments that used to sit higher on the cheek, weakening of the retaining ligaments (particularly the mandibular septum) that normally hold fat pads above the jawline, and resorption of the jawbone itself in the prejowl region, which removes the skeletal support the soft tissue used to rest on.
None of these processes alone fully explains why jowls often seem to "appear" fairly suddenly in the late 40s or early 50s — each has usually been progressing quietly for years, and what changes is that their combined effect crosses a visible threshold at roughly the same time.
How much of this is collagen loss specifically?
A meaningful share. Dermal collagen density is estimated to decline by about 1% per year starting in the mid-20s — a slow, steady erosion rather than a single event. Elastin, the protein that lets skin snap back into place, is produced mostly during childhood and isn't meaningfully replenished in adulthood, so once it degrades, that particular contribution to firmness doesn't recover on its own. This is the piece of the puzzle most oral and topical interventions target.
What actually helps
Sun protection is the single most consistently recommended preventive measure across dermatology sources, since UV exposure accelerates collagen breakdown. For active intervention, retinoids have a real evidence base for increasing dermal collagen density over months of consistent use. Topical energy-based devices (radiofrequency, microneedling, ultrasound) create controlled micro-injury that stimulates a collagen response, though results are described as requiring maintenance and plateauing over 1–2 years. For more advanced structural laxity — particularly bone resorption and ligament weakening — dermatology literature is fairly direct that surgical approaches address the mechanical causes most completely, while non-invasive options offer real but more modest results.
What human studies actually show
A randomized, double-blind, placebo-controlled trial of low-molecular-weight collagen peptide (PMC6073484, n=64, 12 weeks) found significant improvements in skin hydration and wrinkle-related measures compared to placebo, alongside reduced activity of collagen-degrading enzymes (MMP-3, MMP-13).
A separate RCT of oral collagen peptides (PubMed 33774639, n=99 Japanese women, 12 weeks) found real increases in skin water content and natural moisturizing factor — but explicitly reported that skin elasticity and skin thickness remained unchanged, a useful honest counterweight to marketing claims that collagen supplements firm skin.
A 2026 meta-analysis of oral and topical peptides for skin aging concluded that while hydration, roughness, and wrinkle severity showed the most consistent improvements, effects on elasticity specifically were more modest and heterogeneous across studies — suggesting collagen supplementation is not a reliable standalone fix for structural sagging.
What this won't fix
Bone resorption and ligament laxity — two of the four mechanisms described above — are structural changes that topical or oral interventions are not positioned to reverse. If jowling appears suddenly, asymmetrically, or is accompanied by other new facial changes, that's worth a medical evaluation rather than assuming it's routine aging, since sudden or one-sided changes can occasionally reflect other conditions.
The jawbone piece most people don't know about
Of the four mechanisms, jawbone resorption is probably the least intuitive and the most overlooked in general conversation about facial aging, since most people assume it's purely a soft-tissue issue. Longitudinal anatomical studies have confirmed the mandible measurably loses volume with age, particularly in the anterior and lateral regions near the chin and jawline. As bone in the prejowl area resorbs, a subtle depression (the prejowl sulcus) deepens just beside the chin, and the mandibular angle itself recedes — removing the underlying skeletal shelf that soft tissue used to rest on. This is part of why estimates about jowl treatment are honest about scope: even when skin quality and collagen are directly addressed, if the bony support beneath has genuinely changed, topical approaches are working against a moving structural target rather than a fixed one.
FAQ
Can facial exercises get rid of jowls?
The evidence for facial exercises specifically improving jowls is sparse and low-quality; one small trial suggested modest midface improvements but had significant methodological limitations and hasn't been replicated.
Do collagen supplements actually work for sagging skin?
Trials show real, measurable improvements in hydration and some wrinkle measures, but the effect on elasticity and firmness specifically is more inconsistent — it's a genuine but modest tool, not a substitute for treatments targeting the structural (bone and ligament) causes.
Why do jowls seem to appear overnight in my late 40s?
They don't actually appear overnight — collagen loss, fat migration, ligament weakening, and bone resorption have usually been progressing separately for years before their combined effect becomes visually obvious.
Is sun exposure really that important?
Yes — UV-driven collagen breakdown is one of the most consistently cited accelerants of jowl formation across the dermatology literature, making daily sun protection one of the few genuinely preventive measures.
Does smoking make jowls worse?
Yes — beyond the repetitive facial muscle movement involved, cigarette smoke contains compounds that directly damage collagen and elastin, and smoking also limits the skin blood circulation needed to maintain healthy tissue.
Does genetics play a role in how pronounced jowls become?
Family history is commonly cited as a meaningful predictor — the degree of jowling in a person's parents is often described by dermatologists as a reasonable indicator of what to expect, on top of the shared lifestyle and sun-exposure factors that also run in families.
From Nuvirox
Why we formulated NAD+ Restore
NAD+ Restore is formulated around ingredients studied for their role in cellular energy metabolism, backed by a 60-day money-back guarantee — long enough to actually evaluate it the way the research says you should. We're currently reformulating the product, so we're keeping this section general rather than listing specific ingredients or dosages that are about to change.
Learn more about NAD+ Restore →The bottom line
Jowls and neck sagging come from at least four distinct processes working together, not simply "loose skin." Collagen-supporting approaches can meaningfully help hydration and texture, but the fair reading of the evidence is that they're a modest piece of a larger structural picture.
You might also find our coverage of the related shift in body fat distribution useful.
References
- Revitalizing the lower face: jowl rejuvenation. J Cosmet Dermatol, 2024.
- How to Get Rid of Jowls: mandibular septum and bone resorption anatomy research summary.
- Oral Intake of Low-Molecular-Weight Collagen Peptide Improves Hydration, Elasticity, and Wrinkling. PMC6073484, Nutrients 2018.
- Oral Supplementation of Collagen Peptides Improves Skin Hydration by Increasing NMF. PubMed 33774639.
- Oral and topical peptides for skin aging: systematic review and meta-analysis. Frontiers in Medicine, 2026.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.